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181 articles for “Refrigerant.”
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Ejector Refrigeration Technologies: an Overview
Abstract: The objective of this paper is to provide an overview on ejector refrigeration systems and to provide useful guidelines regarding background and operating principles of ejector. The development history and recent progress in ejector refrigeration systems discussed. For these reasons, the research activities in this sector are still getting higher and higher to solve the essential points that make these systems which are not yet reached to compete with the …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 6, Issue 2, 2019 · pp. 6–21 Read article
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Experimental Investigation on Performance of Vapor Compression Refrigeration System using Nanorefrigerant (R134a+Al2O3) with/without Evaporative Condenser
Abstract: In traditional refrigeration system the main focus of researchers is always to improve its performance by reducing work of compression and enhancing the heat transfer rate in different heat exchangers and this can be achieved by adopting suitable technique. In this research work experiment is carried out on vapor compression refrigeration test rig using nanorefrigerant of R134a as base refrigerant and nanoparticles of aluminium oxide Al2O3 in different concentration so …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 7, Issue 3, 2020 · pp. 1–8 Read article
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Solar Refrigeration using Peltier Module
Abstract: AbstractIn the ongoing year, vitality emergency and condition corruption because of the expanding CO2 emanation and ozone layer consumption has become the essentially worry to both created and creating nations. Sun based refrigeration utilizing Peltier module needn't bother with any sort of refrigerant and mechanical gadget like blower, prime mover and so on for its activity. Our venture uses the sun-oriented vitality for its activity. Sunlight based refrigeration utilizing Peltier …
Published in Journal of Instrumentation Technology & Innovations · Vol. 10, Issue 1, 2020 · pp. 30–34 Read article
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A Review on Ejector Based Refrigeration System
Abstract: Abstract Development of industry and increasing living quality, there is a continuous increase in demand of energy which has led to serious environmental issues like global warming, air pollution, production of toxic gases, ozone layer depletion, etc. High oil prize is motivating the researchers to search into renewable energy alternatives. Energy supply to the refrigeration and air conditioning system constitutes a significant role in the world. So, it is very …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 3, Issue 2, 2016 · pp. 8–36 Read article
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Use of Refrigerating Technologies in Cold Chain Solution: A State-of-the-Art
Abstract: This paper reviews the development of cold thermal storage technology. In this work, a review has been carried out of the operating strategies, management and thermal load, cold storage types and storage media, current and alternative possible technology for food transport refrigeration and thermoelectric cooling and power generation used in the cold chain. Conservation and transport of temperature-sensitive materials and applications are discussed. This paper lists over 89 references.Keywords: Cold …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 3, Issue 2, 2012 · pp. 39–60 Read article
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A Numerical Study on Static and Dynamic Characteristics of Electromagnetic Air Compressor used in Household Refrigerators
Abstract: With the development of high-strength magnetic material, moving magnet linear compressors have been gradually introduced in the fields of refrigeration and cryogenic engineering, especially in Stirling. This paper presents computational investigations on the static and dynamic characteristics of a moving magnet. Equivalent magnetic circuits and finite element approaches have been used to model the moving magnet linear motor. In this paper an electromagnetic air compressor is used, where the piston …
Published in Journal of Experimental & Applied Mechanics · Vol. 5, Issue 3, 2014 · pp. 8–15 Read article
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Evaluation and Optimization of an Aqua-Ammonia Vapor-Absorption Refrigeration System
Abstract: The process parameters of ammonia-water absorption system were optimized in terms of temperatures of generator and condenser and heat ratios of generator-to-condenser and generator-to-absorber. The iteration method was used to get the variation in generator and condenser temperatures with coefficient of performance (COP) for the fixed evaporator temperature. The sizing of generator, absorber and condenser was found from the variation of heat ratios of generator-to-condenser and generator-to-absorber for the fixed …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 1, Issue 1, 2014 · pp. 9–17 Read article
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Experimental Evaluation of Environmental Friendly and Low Global Warming Refrigerants as an Alternative Option for Window Air Conditioning System
Abstract: This paper presents an experimental evaluation and performance comparison of window air-conditioning system with R-410A and R32 and to compare with HCFC-22 refrigerant. The base line test is performed with 2 “Ton of Refrigeration” (TR) capacities air conditioner, with evaporator temperature of 7.2 °C and condenser temperature of 54.4 °C. The coefficient of performance (COP) of the refrigerants R32, R22 and R410A are 3.81, 3.15 and 2.17 respectively simulated; it …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 1, Issue 3, 2014 · pp. 7–13 Read article
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Experimental Analysis of Capillary Tube in a Vapor Compression Refrigeration System
Abstract: Abstract A capillary is an essential deice of a vapor compression refrigeration system. It is used to reduce the condenser pressure to evaporator pressure. The refrigerant is expanded enthalpically, the reduction in pressure also reduces corresponding saturation temperature. This paper presents the analysis of expansion device accounting for three different sizes of capillary tubes. The investigations are carried out for different length of capillaries measuring 3, 3.5 and 4 m …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 3, Issue 1, 2016 · pp. 32–34 Read article
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Performance Evaluation of Solar Refrigeration System Using the Numerical Methods
Abstract: Abstract Nonconventional sources of energy are main alternate resources which can provide a solution for the faster rate of depletion of fossil fuels. All renewable energy comes ultimately from the sun. We can use the sun directly (as in solar heating systems) or indirectly (as in hydroelectric power, wind power, and power from biomass fuelsetc.).Directly, the solar energy can be used to the maximum extent in ice making industries, air-conditionings, …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 4, Issue 1, 2017 · pp. 1–12 Read article
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Solar Assisted Half Effect Refrigeration System
Abstract: Solar assisted half effect refrigeration system has been studied comprehensively. The effect of various parameters on overall performance of the system has been done quantitatively. In addition to this, solar thermal calculations are performed and its contribution in saving energy is also assessed.
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 6, Issue 2, 2019 · pp. 27–31 Read article
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Thermodynamic Analysis of an Adsorption Refrigeration System
Abstract: In this paper, thermodynamics analysis of an adsorption refrigeration pair (activated carbon and methanol) at adsorption equilibrium conditions has been proposed. Similar analyses have been done by different scientists for different combinations of adsorbent-adsorbate pairs. Adsorption refrigeration processes normally occurs in physical adsorption condition and activated carbon molecules being non-polar in nature, micropores approach of adsorption (Polanyi’s micropores theory and D-A equation) has been followed here. Analysis of the adsorption …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 1, Issue 1, 2014 · pp. 30–37 Read article
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Ecological Optimization of Irreversible Carnot Magnetic Refrigerator
Abstract: Abstract An irreversible Carnot Cycle model is analyzed, with the help of various irreversibility factors, such as finite time analysis and heat leakage. In which, several important performance parameters, such as the cooling rate, coefficient of performance (COP), power input, exergy output rate, entropy generation rate, and ecological function are derived, with taking the assumptions like, heat leakage and the time of the isothermal processes in account. Ecological optimization factor …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 3, Issue 2, 2016 · pp. 61–68 Read article
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Piezo-electrically driven Thermoacoustic Refrigerator
Abstract: Thermoacoustic refrigeration is an emerging field of technology. This technology uses sound waves to pump heat across a temperature gradient and the sound waves are produced using piezoelectric material. The main aim of this idea is to reduce the usage of harmful refrigerants which are great threat to the global warming. The study focuses technically on using the piezo-electric materials to get the desired refrigeration effect. Moreover, the added advantage …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 5, Issue 3, 2018 · pp. 43–47 Read article
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Energy and Exergy Analysis of Ammonia Water Operated Vapour Absorption Refrigeration System Using Artificial Neural Network Approach
Abstract: In this study, energy and exergy analysis have been performed of the ammonia-water operated vapour absorption refrigeration (VAR) system. Authors have trained artificial neural network (ANN) for predicting thermodynamic properties (specific enthalpy and specific entropy) of working fluid (ammonia-water). Authors have achieved coefficient of multiple determination (R2) value 0.9999 and the root mean square error (RMSE) value 0.00211 for input data set of saturated liquid and R2 value 0.999999 and …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 2, Issue 1, 2015 · pp. 7–20 Read article
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Thermodynamic Analysis of Single Effect, Double Effect and Multi Effect LiBr/H2O Vapour Absorption Refrigeration Cycle
Abstract: Abstract Energy is most important parameter in any industry. If energy is not saved, it would go waste. Vapour absorption refrigeration system is the best solution for waste heat utilization. The vapour absorption cycle has low COP compared to vapour compression cycle. So, study of thermodynamic analysis on cycle is required. In this study, COP and heat required for different cycles is compared. The COP of single effect, double effect …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 4, Issue 1, 2017 · pp. 43–55 Read article
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Vortex Tube Refrigeration System under Different Working Parameters: A Study
Abstract: AbstractThe vortex tube is a small, likable, and marvelous mechanical device used as refrigeration machine. Vortex tube is a device having no moving parts that separates the high pressure stream flow into two streams namely hot and cold at defined pressure. At the separation of two streams, one stream rejects the heat and becomes colder while the other receives the rejected heat and becomes hotter as compared to previous one. …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 4, Issue 3, 2017 · pp. 7–12 Read article
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Application of Refrigerator and Heat Pump Operated by Solar Photovoltaic Modules for Room Air Conditioning in Kolkata City
Abstract: India is a hot climatic country there is an urgent need for refrigeration mainly in May (the hottest month),March, and September (moderate hot), and also a heating requirement for cold weather (January). The present work deals with the air refrigeration in Kolkata city of a room maintained at 15oC in May(hottestmonth)(with evaporator temperature (12oC), condenser temperature (38oC)), at 20oC in March (with evaporator temperature (18oC), condenser temperature (36oC)) ,at 22oC …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 9, Issue 2, 2022 · pp. 11–23 Read article
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Modelling and finite element analysis of thermo acoustic refrigerator
Abstract: In this work, the standard modified thermo-acoustic refrigerator (TAR) is created. It has a stack, heat exchanger, thermocouple, resonator tube, and an acoustic driver (loudspeaker). The effects of a few design factors were investigated for a thermo-acoustic refrigerator system, including wave patterns, frequency, and heat exchanger. It was discovered that a sine wave pattern produced better cooling results than the other wave patterns examined. The heat exchanger's addition greatly increases …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 9, Issue 3, 2022 · pp. 31–46 Read article
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Analytical Design of 1 kW Capacity Lithium Bromide/Water Absorption Refrigeration System
Abstract: AbstractIn current era, the energy scarcity is the key concern. In this context, new alternative environment-friendly energy resources have to be explored. The researchers are focusing more on effective and efficient use of energy. The difference in demand and production of energy opens a new arena of heat recovery systems. Vapour absorption refrigeration systems (VARS) are one of the prominent heat recovery systems powered by heat, and can be powered …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 8, Issue 3, 2017 · pp. 36–49 Read article