International Journal of Current Engineering and Technology
The International Journal of Current Engineering and Technology (IJCET) is a peer-reviewed, open access scholarly journal established in 2010 with the objective of promoting excellence in engineering research and technological innovation. The journal publishes original research articles, review papers and technical communications across all major disciplines of engineering and applied sciences, providing an international platform for academicians, researchers and industry professionals to share high-quality contributions. E-ISSN: 2277-4106 (Online) P-ISSN: 2347-5161 (Print) Frequency: Bimonthly: Jan/Feb, Mar/Apr, May/Jun, Jul/Aug, Sep/Oct, Nov/Dec Editorial Office: editor.ijcet@evegenis.org, editorial.ijcet@gmail.com All submissions undergo a rigorous double-blind peer review process to ensure originality, technical soundness and academic relevance. The journal encourages interdisciplinary research and aims to support the dissemination of innovative solutions addressing contemporary engineering challenges. Aim and Scope IJCET aims to promote cutting-edge research and industrial innovation in the field of engineering and technology. The journal covers, but is not limited to, the following areas: ■ Mechanical, Civil, Electrical and Electronics Engineering ■ Computer Science, Information Technology and Artificial Intelligence ■ Communication Systems, Signal Processing and Embedded Systems ■ Materials Science, Manufacturing and Industrial Engineering ■ Renewable Energy, Sustainable Technologies and Environmental Engineering ■ Robotics, Automation, Internet of Things (IoT) and Smart Systems Key Commitments ■ Global Reach: The journal maintains an international perspective, welcoming submissions and catering to an audience from all corners of the world. ■ Current Relevance: A strong emphasis is placed on research that addresses contemporary global issues, emerging trends, and recent developments across various disciplines. ■ Quality Assurance: All submitted manuscripts undergo a rigorous double-blind peer-review process to ensure the highest standards of academic validity, originality, and excellence.
Artificial Intelligence-Driven Prediction of Hotel Booking Demand for Revenue Optimization
The rising competitiveness in the hospitality industry requires proper and smart forecasting models to maximize the hotel booking demand and revenue management plans. The proposed study is a hybrid CNN-Bi-LSTM model to predict the canceling of hotel bookings based on the Kaggle hotel booking demand dataset. An organized preprocessing system adopted, such as the missing value imputation, the treatment of ADR outliers, the encoding of labels, feature engineering, correlation-based feature importance analysis and, to enhance the model's dependability and data quality, the class balancing performed using SMOTE. The architecture proposed combines Convolutional Neural Networks (CNN) to obtain meaningful feature representations and Bidirectional Long Short-Term Memory (Bi-LSTM) networks to learn temporal patterns of booking. The applied approach has proven to be effective based on the results of performance evaluation with the help of confusion matrix-based measures 98.95% accuracy (acc), 98.82% precision (prec), 99.91% recall (rec), and 98.90% F1-score (F1). A comparative analysis indicates that the hybrid CNN-Bi-LSTM is much better than the classical models, which include Decision Tree, Random Forest, and standalone XGBoost. The results affirm the soundness, generalization and applicability of the suggested framework regarding the intelligent hotel booking demand forecasting and decision-making
Hotel Industry, CNN-Bi-LSTM, Revenue Management, Demand Predictions, Hospitality Sector
Copyright (c) 2026 International Journal of Current Engineering and Technology
Typology of Housing and Household Energy Behaviors in Cameroon: Diagnosis for better Energy Efficiency
This research analyzes the determinants of domestic energy efficiency in Cameroon through a quantitative study of 333 households in Douala, Yaoundé, and Ngaoundéré. Using Chi-square χ^2independence tests, the study explores correlations between sociodemographic factors, housing characteristics, and installed energy capacity. Key Results include: Material Inertia: A strong geographical dependence exists between cities and construction materials p < 0.001. Adobe bricks with cement mortar, dominant in Ngaoundéré, offer under-exploited thermal efficiency potential compared to the cement-dominated metropolitan areas of Douala and Yaoundé. Generational Transition: Refrigeration equipment follows a life cycle, with a critical acquisition phase between ages 25 and 35, identifying this as the pivot segment for introducing high-performance technologies. The Performance Paradox: Analysis demonstrates that physical size and equipment type are not reliable indicators of installed power. Only the Energy Class (A+, A++) allows for a real and significant reduction in power demand < 50 kW. Information Deficit: A major obstacle was identified: 69% of users are unaware of their appliance's energy class, a technical ignorance that increases with the surface area of the dwelling.
Habitats, Behaviors, Households; Diagnosis, Energy Efficiency
Typologie of housing and household Energy behaviors in Cameroon : diagnosis for better Energy efficiency.
This research analyzes the determinants of domestic energy efficiency in Cameroon through a quantitative study of 333 households in Douala, Yaoundé, and Ngaoundéré. Using Chi-square independence tests, the study explores correlations between sociodemographic factors, housing characteristics, and installed energy capacity. Key Results include:Material Inertia: A strong geographical dependence exists between cities and construction materials p < 0.001. Adobe bricks with cement mortar, dominant in Ngaoundéré, offer under-exploited thermal efficiency potential compared to the cement-dominated metropolitan areas of Douala and Yaoundé.Generational Transition: Refrigeration equipment follows a life cycle, with a critical acquisition phase between ages 25 and 35, identifying this as the pivot segment for introducing high-performance technologies.The Performance Paradox: Analysis demonstrates that physical size and equipment type are not reliable indicators of installed power. Only the Energy Class (A+, A++) allows for a real and significant reduction in power demand < 50 kW.Information Deficit: A major obstacle was identified: 69% of users are unaware of their appliance's energy class, a technical ignorance that increases with the surface area of the dwelling.<!-- [if gte vml 1]><v:shapetype id="_x0000_t75" coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f"> <v:stroke joinstyle="miter"/> <v:formulas> <v:f eqn="if lineDrawn pixelLineWidth 0"/> <v:f eqn="sum @0 1 0"/> <v:f eqn="sum 0 0 @1"/> <v:f eqn="prod @2 1 2"/> <v:f eqn="prod @3 21600 pixelWidth"/> <v:f eqn="prod @3 21600 pixelHeight"/> <v:f eqn="sum @0 0 1"/> <v:f eqn="prod @6 1 2"/> <v:f eqn="prod @7 21600 pixelWidth"/> <v:f eqn="sum @8 21600 0"/> <v:f eqn="prod @7 21600 pixelHeight"/> <v:f eqn="sum @10 21600 0"/> </v:formulas> <v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect"/> <o:lock v:ext="edit" aspectratio="t"/> </v:shapetype><v:shape id="_x0000_i1025" type="#_x0000_t75" style='width:15.75pt; height:18pt' o:ole=""> <v:imagedata src="file:///C:\Users\SIMOK~1\AppData\Local\Temp\msohtmlclip1\01\clip_image001.wmz" o:title=""/> </v:shape><![endif]--> <!-- [if gte mso 9]><xml> <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1025" DrawAspect="Content" ObjectID="_1834224128"> </o:OLEObject> </xml><![endif]-->
Habitats; Behaviors; Households; Diagnosis; Energy Efficiency
Design and Modification of Thermoelectric Tube using Different Materials
By using thermoelectric generators it is possible to develop independent electric energy source in burning and heating systems – in households and industrial heating. With this energy source it is possible to provide with electricity systems appliances, lightening and other consumers. Potential placements for generators are on furnace walls, on flue way walls, on flue pipe walls after furnace. Generators can improve efficiency of combustion, because there is amount of waste heat that leaves through flue pipe in burning process. There are no boundaries for combining elements in system as just the space for their placement. As more elements are linked in chain, as much electric energy is produced. This is one of methods to develop a cogeneration process in domestic boiler house or industrial heating, or burning systems. In research thermoelectric element current, voltage, power and efficiency are defined in different temperature differences.
Water as a Refrigerant for Heat Pump Technology: A Review
Even though water (R718) is one of the oldest refrigerants, it is very difficult to use it in compression refrigeration cycle due to its low molecular mass, high boiling point, low specific cooling capacity and a relatively higher value of kinematic viscosity. This paper gives us a glimpse about one of the technique which can be used to use water in compression cycle and also compares its theoretical analysis with the conventional refrigerants already being used. This paper can study the effect on various parameters under similar operation conditions for the comparative study of water and other refrigerants.
Cold Testing of IC Engines using Solar Energy
Cold testing of IC engines is becoming essential with the growing demand for environment friendly testing processes. This paper explains the processes of hot and cold testing and gives an example of sample calculations needed to energise a test bed using solar energy.
Mathematical Analysis for Small-Scale Osmotic Power Generation
According to the ‘Guardian’ the rise in the carcinogens and other harmful compounds are on rise since 1971. The increase have been noted to be 2% per year. United States contribute to 10% increase between 1999 and 2011. Harnessing energy from various renewable sources is the need of the hour and this paper puts forward a method which is in research stage at Statkraft*. The paper gives a mathematical investigation for it’s use for small scale applications and the methodology is further generalized. The results obtained can be used for respective applications as they are largely pertinent.
The paper aims in improvisation of the grinding process for elastic materials like rubber, plastic, composites, metals, waxes etc. Nowadays, we find a lot of wastage of these materials. Some of them like plastic, artificial rubber composites are very much harmful for our environment. This research will basically help in cautious use of the above mentioned pollutants. For example, Thermoplastics are difficult to grind small sized particle at ambient temperature because they are soften adhere in lumpy masses and clog screens. In cryogenic grinding when thermoplastic is chilled by dry ice, liquid carbon dioxide or liquid nitrogen they can be finally grounded to powder suitable for electrostatic spraying and other powder processes. Advantages of these processes are to increase productivity through optimized particle size, elimination of caking product within the mill, increases protection from the fire and product oxidation due to inert milling atmosphere..
Cryogenic system for High Temperature Superconducting Power Cable-A Review
Materials which shows superconductivity above liquid nitrogen temperature are known as high temperature superconductors. J.G. Bednorz and K.A. Mueller were awarded noble prize for discovering high temperature superconductors in 1987. Since last 3 decades there has been significant augmentation in the field of superconductivity. The primary advantage of HTS power cable over conventional cable is the ability to carry more power per circuit with lower energy cost per megawatt delivered. Power transmission is loosely defined as the transfer of electrical energy from source to a load over conductors that carry relatively large currents, while being maintained at large voltage. In order to achieve liquid nitrogen temperature, efficient cryogenic system is required. Hence, it is integrated with HTS power cables. Several HTS cables have been designed, developed and operated in various parts around the world. Most of them are used for experimentation purpose. Very few of them are used in electrical grids. Use of high temperature superconductivity in electrical grids will have a major positive impact on power system operation and control. HTS power cable is placed into heat-insulated pipe which is filled with cryogen. Circulation of cryogen removes heat seeping through the insulation. HTS power cables with different design considerations can be used for transmission of AC and DC.
Review on Effective Utilization of Electric Energy for Water Heating by Water Changing Property
Electricity is major parameter in our life which having wide application. By survey we use maximum electric energy for comfort life. In during various application of domestic we use hot water. To heat a water use various equipment which based on electric energy. In this experiment pH of water will be changes by using natural resources by observe what will be effect on heating purpose. Energy important and major source use in industries as well as Domestic purposes. This project will give one idea about how will improve efficiency and to save energy of heating coil which are used in industry and domestic for to heat water. We know that now days we concentrated on to saving energy because one day all natural energy sources will be end. So now we concentrate on saving energy in any field and to utilize energy so it span time will increase. In America they are used shell gases which are new technique but one day it will be vanish. If we survey in world there are so many energy required to produce electricity and every person used electric energy so we need highest energy efficiency equipment. In boiler there is convention and non -convention method also some time we used coal but with considering time is money so they change input from coal to electric energy. This experiment we get best utilization of nature resource for to save energy. There will be getting best method to reduce electric energy so whenever coil or electric furnace boiler used there will be water treated process will conduct. There is hypothesis is if change in pH of water due to that electricity required to heat water is also vary.
Review on Heat Transfer Enhancement of a Plate Fin Type Heat Exchanger by Different Shapes of Fins
Heat transfer enhancement techniques as passive, active or a combination of passive and active methods are commonly used in areas such as process industries, heating and cooling in evaporators, thermal power plants, air- conditioning equipment, refrigerators, radiators for space vehicles, automobiles (in tracked vehicle it plays very important roll), etc. Passive techniques, where inserts, extended surfaces like fins of various shapes and sizes are used in the flow passage to enhance the heat transfer rate, are benefited compared with active techniques, because the insert manufacturing process is easier and it can be easily applied in an existing heat exchanger. In design of compact heat exchangers, passive techniques can play an important role if a proper passive configuration/combinations can be selected according to the heat exchanger working condition (both flow and heat transfer conditions). Ribs, fins, dimples, Vortices etc., are the most commonly passive heat transfer enhancement devices. In this paper, major emphasis is given to work with different shapes of fins, and their arrangement because, these are found effective heat transfer enhancement tools.
Review on Optimization of Tilt Angle for Solar CSP for effective steam generation
Ample of Solar power is available in universe . It can be used for various applications . One of them is steam generation . Parabolic shaped dishes Concentrating Solar Power (CSP) technology can be found one of the most important option for generating renewable electricity at the required scale .The paper presented here , we have tried to do the optimization of tilt angle of Solar concentrators by using Taguchi Method . This is a statistical approach to optimize the variable process parameters and improve the quality of concerned components that are manufactured. The objective of this study is to illustrate the procedure adopted in using Taguchi Method to find best tilt angle for CSP . First, a Taguchi experiment was used to perform an efficient experimental design and analyzed the robustness of the tilt angles for fixed south-facing PV modules. The objective is to maximize the steam generated from the modules .
Solar driers applied for drying of agricultural and foodproductswitha retrospective study
Solar drying has several advantages over the traditional drying method and it has been now modernized and developed for drying various agricultural and food products. Solar energy drying which is proven to be an environment friendly and economically viable in the developing countries. The working condition with respective to design of various solar driers with thermal drying factors has been reviewed.
Performance investigation of centrifugal pump by varying blade angles of the Impeller–A Review
Centrifugal pumps are probably among the most often used machinery in industrial facilities as well as in common life. Centrifugal pump is widely used as a universal machine, so improving hydrodynamic performances of the centrifugal pump is important for energy saving. With the development of computational fluid dynamics (CFD), numerical simulation has become the main method for performance prediction and structure design of the pump. The impeller is the most important part in a centrifugal pump since it is the place where the mechanical energy is converted into hydraulic energy. Hence the parameters related to the impeller are directly affecting the performance of the pump. One of them is the blade exit angle; if it is not correctly designed, it can negatively affect the head and the hydraulic efficiency of the pump. The previous research suggests that a larger blade angle is suitable. Also, exit blades angle variation contributes more in the performance.
Experimental Investigation of Solar Adsorption Refrigeration System using Activated Charcoal-Methanol Working Pair
The extensive effort has made to develop the intermittent solid adsorption system that promises good alternative for solar refrigeration. Most research methods have used activated carbon–methanol for working pairs, and this has been considered as the most suitable working pair for solar solid adsorption Refrigeration. Going through the existing literature, it is revealed that there are no investigations on the simultaneous use of water cooled condenser, bypass way for adsorption process. Many researchers studied on TIM (transparent insulation material) for increasing the efficiency of solar collector. But, in this study, it is analyzed the solar powered refrigerator using polycarbonate glass, water cooled condenser with natural conduction, bypass way for adsorption to enhance the performance of solar adsorption system. Using this cyclical process it is possible to obtained cooling temperature of 11˚C. For increasing the effectiveness of solar heating, polycarbonate glass is used to achieve generator temperature up to 114˚C. In this system two valves with provision for bypass is made for easy operation and maintaining the flow of methanol during day and night. The solar powered activated charcoal-methanol paired system gives the cooling temperature up to 11˚Cfor 6kg water and achieve system COP=0.02.
Methanol-Activated Charcoal Refrigeration
Geometry optimization of exhaust manifold using CFD
It is well known that a appropriately designed Exhaust manifold is important for the optimal performance of an IC engine. Though, the intake system is dominant on the cylinder filling process, the exhaust manifold has ability to influence the gas exchange process in various important aspects, like the piston work done during the exhaust stroke, the short-circuit of fresh charge from the intake into the exhaust. We know that if the back pressure of Exhaust gases is higher, it reduces efficiency of the engine. So aim should be to reduce the back pressure of the engine. Also amount of pressure drop is equal to back pressure. So ultimate goal is to reduce its pressure drop by changing its geometry, reducing friction in the manifold . In this paper only Geometry optimization is done. This paper presents 3-D simulation of Exhaust manifold of 4 cylinder, 4 Stroke, turbocharged diesel engine(4G11 Greaves Engine) of generator by using ANSYS-CFX code and results are discussed. A Steady state CFD simulations have been accomplished and experimental results are compared for validation. The CFD results gives an idea for changing its geometry.
Implementation of Bharat Stage VI norms for small and medium duty CI engines
The emissions from the internal combustion engine are a major threat to the environment and thus needs to be controlled and kept a close watch on. India has decided to jump directly to BS VI after BS IV leapfrogging BS V. This paper mentions a few methods by which the target can be achieved and newer and better methods to achieve BS VI target. The changes that can be made to meet the stringent norms are either in the engine architecture, air handling system, after-treatment devices etc. But a sure shot method for the conversion of existing engines is still not present and is a major gap in the study and requires immediate attention.
Effects of Splitter Blades on Centrifugal Pump Performance - A Review
In turbomachinery design like pumps and compressors impeller is a crucial part. Centrifugal pump design is well facilitated by the use of Computational Fluid Dynamics (CFD). Opportunities do exist to improve the pump performance. This improvement can be achieved by making geometrical changes in design of an impeller like blade inlet & outlet angles, impeller inlet & outlet diameter and number of blades. Increase in number of blades increases the head and in addition causes the efficiency to decrease. This decrease in efficiency is due to the blockage of the fluid due to reduced area and increased friction inside the casing. Addition of splitter blades decreases the clogging at impeller inlet resulting in increase in pump performance. In this paper overview of various works by previous researches & their finding about study of effect of splitter blades on the centrifugal pump performance are done. And it is observed that as the splitter blade length increases; the flow rate and power increases, the efficiency decreases as well as hydraulic performances are improved, pressure fluctuations are reduced, and operating range is extended.On the other hand, the additional splitter blades will have positive effect on the cavitation performance due to the changes at the impeller inlet channel.
Analysis of gas diffusion in closed space: A Review
The hydro-chloro-fluorocarbon (HCFC) and hydro- fluorocarbon (HFC) are common refrigerant used for room air conditioner (RAC). But these are restricted due to a serious environmental issues owing to the high global warming potential (GPW). The replacement with low-GPW refrigerant such as R1234yf, R1234ze, R290 and R32 can be possible. R290 (propane) has major environmental and thermo-physical properties. But it is a flammable substance, thereby posing additional risks. When refrigerant leak into space, it may ignite if the concentration is higher than low flammable limit (LFL), there is always a region where the refrigerant concentration is higher than the LFL because the refrigerant concentration is 100% near the outlet from the air conditioner. Thus, understanding the refrigerant diffusion phenomena of low-GWP refrigerants is important to acquiring sufficient information for developing safety standards to assess the risks of using these refrigerants. In this study, diffusion phenomena were analyzed when a refrigerant leaked slowly from a room air conditioner (RAC) into a closed space.
Heat Transfer Enhancement in Shell and Tube Condenser
To increase the efficiency of the heat exchanger, the heat transfer enhancement techniques are utilized. This can be achieved once the heat transfer power of a given device is magnified or once the pressure losses generated by the device are reduced. Heat transfer enhancement is require to achieve a high heat transfer rate using minimum pumping power, to make the equipment compact, to minimize cost of energy and material, to get high heat transfer effectiveness, to increase efficiency etc. Condensers are primarily heat exchangers within which the refrigerant undergoes a phase transition which have various designs and come in many sizes. Shell and tube condenser is the most common type of condenser used in systems from 2 TR up to thousands of TR capacity. The Condensation of steam on single horizontal copper tube in a shell and tube condenser has been investigated using experimental and theoretical ways during this study. The outer surface of the tube was changed by brazing it with a copper wire lengthwise and helically to enhance the heat transfer constant. The result of varied the pitch of the helically brazed wire was studied with twenty five millimeter and thirty five millimeter pitch. Lengthwise Wire Brazed (LOWIB) and Helically Wire Brazed (HEWIB) Copper tubes with pitch twenty five millimeter and thirty five millimeter were found to extend the heat transfer constant by an element of about 1.5, 2 and 1.2 severally.
Effect of Different types of Baffles on Heat Transfer Pressure Drop of Shell and Tube Heat Exchanger: A review
Diverse sorts of heat exchangers are broadly utilized as a part of many design applications, for example, petroleum refining, refrigeration, cooling, nourishment industry, and so forth. Among various sorts of heat exchangers, manufacturing of shell and-tube heat exchanger is easy and multi-reason application conceivable outcomes for vaporous and fluid media in an extensive temperature and pressure territory. This paper manages a survey of exploratory research work that plans to look at the impacts of various baffles sorts on pressure loss and heat transfer in heat exchanger. Baffle is one of the basic part considered in design of STHE. Confuses, having an essential piece of STHE, offer help to keep of support tubes in bundle and as shell side it also helps to maintain the speed of stream. Different sorts of baffles are utilized as a part of STHEs. For example segmental, flower, ring, trefoil hole, plate and doughnut sort and helical. Be that as it may, conventional HX with segmental baffle indicate low heat exchange proficiency and extensive pressure loss. From the present review it can be inferred that helical baffles fill in as an all the more encouraging innovation due to having less loss of pressure in shell, better heat exchange execution, less fouling and less liquid incited vibration.
Design of Heliostat Field for Small Scale Central Receiver System
Central receiver system (CRS) is one of the type of concentrated solar power (CSP) technology which consists of heliostat field, receiver and power generation unit. Heliostats are nothing but the mirrors which concentrate solar radiation at one point on receiver which is located at the top of a high tower. Out of the total cost of system heliostat field contributes 50% and leads to about 47% of the annual energy losses. So placing of heliostats in field is most important in order to minimize optical losses and indirectly minimizes energy losses. In this Paper work, heliostat field is designed for no shadowing, blocking losses and optimized cosine efficiency for small field area specifically for Pune location. An algorithm is developed for heliostat distribution in heliostat field as per design using a MATLAB.
Enhancing Heat Extraction Rate in Automobile Radiator with the Help of Al 0 Based Nano-Fluid. 2 3
Nanofluids are a relatively new classification of fluids which consist of a coolant with nanosized particles of metal oxides (1-100 nm) mixed within them. These addition of metal oxides increase conduction and convection coefficients, so heat transfer rate is increases .In an automobile sector, lot of heat is generated due to the combustion. If this heat is not removed from the engine, temperature becomes too high which causes overheating and decrease in viscosity of the lubricating oil, wear of the parts of engine, failure of engine components may occurs due to high thermal stresses. The automobile engine uses a heat exchanger device, called as radiator to remove the heat from the engine. But for removing heat, area increasing is the limitation. To avoid this increasing area, we can use the nanofluids which increases the heat transfer rate in engine
Comparing Cooling Performance of Radiator With Cu O Based Nanofluid. 2
In an automobile lot of heat is produced due to the combustion, If this excess heat is not removed, the engine temperature becomes too high which results in overheating and viscosity breakdown of the lubricating oil, wear of the engine parts, due to thermal stress of the engine components failure may occurs in engine. The automobile engine utilizes a heat exchanger device, termed as radiator, in order to remove the heat from the cooling jacket of the engine. But for removing heat, area increasing is the limitation. To avoid this increasing area, we can use the nanofluids. Nano fluid is a fluid containing nanometer-sized particles, called nanoparticles which consist of a coolant with nanosized particles of metal oxides added within them. These addition of metal oxides increase conduction and convection coefficients, so that there is increase in the heat transfer rate. Among all the metal oxides copper oxide nanomaterials have unique thermal properties
Phenomenon of Deflagration to Detonation in Pulse Detonation Engine
A self-sustained wave of chemical reaction propagating through a gaseous explosive mixture is one of the most basic manifestations of gaseous combustion and hence the central issue of interest in combustion science. The phenomenon in which the wave of flame front travels at sub-sonic velocity due to combustion is called Deflagaration while the phenomenon in which the propagation of flame front takes place at high speed due to sudden auto ignition in the combustion chamber is called Detonation. This both terms Deflagration and Detonation are of great interest for researchers as both can produce energy in efficient way . A large number of theoretical , Experimental study has taken place in order to understand basic mechanism of transition from Deflagration to Detonation.
Fabrication and Performance testing of Evaporative Air Cooler with Solar Liquid Desiccant Dehumidification
The extensive effort has made to fabricate and analyze the evaporative cooler with liquid-desiccant regeneration process. A temperature drop of around 4 degrees and a humidity reduction of around 14-16 percent as compared to direct contact evaporative cooler achieved. The enhanced average cooling efficiency of the evaporative cooler is41.828 % achieved with Average dehumidification capacity obtained at different concentrations of desiccantare: At 20% concentration of desiccant = 4.3695 lph, At 30% concentration of desiccant = 5.4845 lph, At 40% concentration of desiccant = 6.391 lph
Heat Transfer Augmentation of Heat pipe using Nanofluids
A new way to enhance the heat transfer rate of heat pipe by going above the already existing heat transfer rate is the use of Nanofluids. This talks about the various researches done on heat pipes with the aid of nanofluids inside it as working fluids. The high impact of characteristics and mass concentrations of nanoparticles on the thermal behaviour and enrichment in various types of heat pipes with various base fluids under number of operating conditions have been studied. In the tested heat pipes the impact of enhancement as well as degradation is explained. A comparative study of the newly designed system with the earlier system by showing the relative degradation is mentioned.
Comparison of Performance and Exhaust Emissions of Jatropha, Palm and Calophyllum Inophyllum Biodiesel: A Review
The world is facing serious issue of environmental pollution and warming. Also, crude oil can become rare and faces severe shortfall within the close to future. Hence, this offers rise to researchers to seek out different fuel sources as alternate energy sources. Biodiesel is the fuel that has been thought of the best substitution for petroleum-diesel fuel as a result of it may be employed in any diesel-engine without any need of modification. Biodiesel is that the renewable fuel and additionally it's having sensible exhaust emissions as compare to diesel. Jatropha biodiesel, palm biodiesel and Calophyllum Inophyllum biodiesel falls within standard quality limits, hence they may be used as the alternative to diesel oil. The performance and exhaust emissions of Jatropha, palm and Calophyllum Inophyllum biodiesel are reviewed in this paper. Among the numerous biofuels available, vegetable oil is foremost economical in case of farmland usage, potency and productivity as it is the crop having oil carrying tendency. The problem associated with edible-vegetable biodiesel is that there's competition among oil as source of fuel or food. This makes edible oil not a perfect feedstock for production of biodiesel. Hence, more consideration is towards different non- edible oils like Jatropha oil, Calophyllum Inophyllum oil. Calophyllum Inophyllum oil may be being thought of as a possible fuel by following transesterification. However in comparison with Jatropha and vegetable oil biodiesel productions, biodiesel from Calophyllum Inophyllum continues to be in an exceedingly analysis state. Hence, long analysis and experimental studies got to be dole out previously considering this oil primarily based biodiesel as an alternate fuel to crude diesel.
A Review on Rock Bed Thermal Energy Storage System for Thermal Stratification and Heat Extraction
The paper discusses about rock bed Thermal Energy Storage System (TES).Solar energy fluctuations are so much that it cannot be used continuously i.e. availability of solar energy varies in summer and winter. Integration of Thermal Energy Storage (TES) with solar energy has the potential to make solar energy available on demand. In TES heat can be stored using rocks in a packed bed. During charging of rock bed, temperature stratification takes place in the bed. For the thermally stratified systems, the quantity of heat extracted depends on whether it is used immediately or not. This paper reviews the technology involved in heat extraction from a charged bed. The effect of heat flow rate on quantity of heat stored and extracted.
In our analytical design, we used 24 blades of a horizontal axis windmill. Each blade has a radius of 1.5 m gives a solidity of 1.018. The torque output of the windmill is 74.24 Nm and this is enough to withstand the desired flow rate of (2.31 X 10-4) m3 per second with a maximum head of 28m.