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82 articles for “Refrigeration effect”
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Enhancement in the COP of Thermoelectric Cooler Used for Cooling of Small Electronic Circuits
Abstract: Amidst growing environment concern, the need for alternative methods of cooling is on the rise, demanding higher intervention of technological advances. Conventional cooling systems working on CFC refrigerant pose threat to environment. The present work deals with performance investigation of thermoelectric cooler based on Peltier effect. Air cooling and water cooling systems are studied involving several parameter modifications. From the experimental work it is evident that optimum cooling is achieved …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 6, Issue 3, 2019 · pp. 20–23 Read article
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Design, Fabrication and Testing of Ejector for Solar Thermal Cooling System
Abstract: The Solar Thermal Cooling System mainly comprises of Solar Panels, Generator, Condenser and Evaporator. In addition an ejector is mounted in the existing system to improve the performance of the system. The Ejector is having a primary and secondary inlet nozzle. In the primary flow nozzle the motive refrigerant will flow with high pressure which comes from generator. The area of the ejector is reduced to increase the pressure by …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 7, Issue 1, 2020 · pp. 12–20 Read article
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Evaporative Cooling By Using Different Porous Materials
Abstract: The method of evaporative cooling involves raising the air temperature by causing water vapour in an airstream to evaporate. Waterneeds the latent heat of vaporisation to evaporate, and this heat is produced by ambient air and a drop in air temperature. A porousmedium is necessary for both direct and indirect evaporative cooling in order to allow heat and mass transfer between the medium'swater and the air moving through it, or …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 9, Issue 2, 2022 · pp. 29–37 Read article
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A Review: Hybrid Air-Conditioning System
Abstract: Abstract Science is universal but technology depends upon local conditions. The world is facing on a large scale, potentially devastating global energy crisis. It has been realized that traditional resource such as oil and gas energy reservoirs cannot meet the rising energy demand. Integrated design is one of the today’s buzzwords in green and sustainable HVAC design approaches and solutions; that are important for achieving good indoor air quality with …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 3, Issue 1, 2016 · pp. 4–10 Read article
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Performance Enhancement of Vapour Compression Refrigeration System by Using Solar Thermoelectric Sub-Cooler
Abstract: Abstract Refrigeration plays a crucial role in many aspects of human life, due to energy crisis it is essential to improve the performance of a refrigerator for given inputs and need to satisfy the environmental challenges with respect to ozone depletion and global warming, R-134a as a refrigerant has a unique thermal characteristics such as low viscosity, good heat transfer coefficients, non-toxic, non-corrosive and environmental benefits in comparison with conventional …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 4, Issue 2, 2017 · pp. 27–37 Read article
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Studying the Effects of Reheat on R134A Cycle Performance using Industrial Air-Conditioning Training Equipment
Abstract: This paper presents an apparatus-based experiment for teaching air conditioning and refrigeration in undergraduate engineering hands-on based learning curricula. Results for an R134A based refrigeration and air conditioning performance are shown in this paper illustrating the effects of re-heat on the COP of the cycle as well as the use on a LabView interface to extract test data. The primary use of this equipment is to show various “what-if” scenarios. …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 1, Issue 2, 2014 · pp. 1–6 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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Exergy Analysis of Vapor Compression Refrigeration System with Refrigerants R134a, R152a, R290 and R32
Abstract: Abstract This paper pressents exergy analysis of vapour compression refrigeration system with refrigerants R134a, R152a, R290and R32. This analysis helps to understand the effect of irreversibility on thermodynamic processes. It shows exergy losses in different components of the system and hence leads to improve the performance of different components of the system. A computational model has been developed to study the effects of evaporator temperature and condenser temperature on COP, …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 2, Issue 3, 2015 · pp. 11–19 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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Study of technical and economic assessment of solar-assisted and thermoelectric air-conditioning technologies
Abstract: This study presents an integrated technical and economic assessment of solar-assisted absorption and thermoelectric air-conditioning technologies for residential cooling applications. A comprehensive methodology combining mathematical modelling, experimental characterization of thermoelectric modules, numerical simulation, and economic optimization was developed to evaluate the performance of both cooling systems. The solar-assisted system employs single-effect LiBr–H₂O absorption chillers operating under water-cooled and air-cooled configurations, simulated using TRNSYS and Engineering Equation Solver (EES), while the …
Published in International Journal of Energy and Thermal Applications · Vol. 4, Issue 2, 2026 Read article
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Efficient Cooling with Peltier Modules: A Guide to Air Cooler Design
Abstract: The average annual temperature is rising due to the daily rise in global warming, which makes life more difficult and stressful for those who live in load-shedding-affected areas. Modern cooling technologies, such as air conditioners and coolers, are useless during the hottest parts of the day because they don't use inverters to generate backup electricity. In order to address the issues of portability, economy, and cost-effectiveness, the idea of alternative …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 10, Issue 2, 2023 · pp. 42–47 Read article
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The Scope of Internet of Things (IoT) for development of tier-2 cities
Abstract: AbstractNow a day’s emphasis is on developing Tier – Cities and people wish that the world would be in their hands. It opens a new market for the computing and smart environment. Citizens also want to effectively communicate with non-living objects like air conditioners, refrigerators, other home appliances, furniture, and clothes etc [1-3]. Technologies already exist for interaction among living things but to communicate with non-living things , Internet of …
Published in Journal of Web Engineering & Technology · Vol. 5, Issue 3, 2018 · pp. 15–19 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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Optimization Strategies for Finned-Tube Gas Coolers in CO2 Heat Pump Systems: A Review
Abstract: In order to reduce CO2 emissions through increased energy use flexibility, this article examines existing energy solutions. It focuses on demand-side management tools such as electric vehicles and heat pumps, as well as storage possibilities. The aim is to shift to sustainable energy sources by striking a balance between non-renewables (coal, gas) and renewables (solar, wind). This is demonstrated by the notable decrease in the usage of oil-fired boilers and …
Published in Journal of Energy, Environment & Carbon Credits · Vol. 14, Issue 3, 2024 · pp. 11–20 Read article
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Study and Influence of heat transfer Characteristics in a Heat Exchanger by using Nanofluids: A Review
Abstract: AbstractHeat transfer play an important role in various applications like Radiator in Automobiles, Refrigerators, Electronic equipment’s etc. Therefore, heat transfer effectiveness can limit the related power utilization. The method for increasing heat exchanger effectiveness is to build higher conductivity of working liquid. The endeavor of this review summarizes the different research work articles on the improvement of the various heat transfer characteristics in heat exchangers utilizing nanofluids on two categories. …
Published in Journal of Thermal Engineering and Applications · Vol. 5, Issue 3, 2018 · pp. 24–29 Read article
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Designing and CFD Analysis of Table Top Refrigerator Hexagonal Coil Crossection
Abstract: In the Present study CFD analysis has been performed on evaporator unit. Tabletop refrigerators are the common house hold unit used in almost all houses. Evaporator and Condenser unit is the main functioning unit of refrigerator system used for the cooling applications. With the increase of modernization use of refrigerator system has rapidly increases due to the reason a lot of researches are prevailing on refrigerator systems. With the updating …
Published in Journal of Thermal Engineering and Applications · Vol. 6, Issue 2, 2019 · pp. 34–51 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
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Exergetic Analysis of Single Effect LiBr-Water Absorption Cooling System
Abstract: Abstract This paper presents the exergy analysis of single effect LiBr-Water absorption cooling system. The work is committed to the study, the evaluation and distribution of the destroyed exergy for each component constituting this kind of system. The thermodynamic models, derived using the first and second laws of thermodynamics, are employed in a computer program using the engineering equation solver (EES) software to perform the calculations. Influence of various operating …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 3, Issue 2, 2016 · pp. 41–48 Read article
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Development of Low-GWP Refrigerants for Future Air Conditioning and Refrigeration Applications
Abstract: The growing concern over global warming and the need to mitigate climate change has propelled significant research into the development of low-GWP (Global Warming Potential) refrigerants for air conditioning and refrigeration systems. Traditional refrigerants, such as hydrofluorocarbons (HFCs), have been widely used in the HVAC&R (Heating, Ventilation, Air Conditioning, and Refrigeration) industry but contribute significantly to global warming due to their high GWP values. As a result, global regulations, including …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 11, Issue 3, 2024 · pp. 35–39 Read article
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Effective efficiency of return flow solar air heater
Abstract: In this paper, the effective efficiency of a return flow solar collector with artificial roughness in the form of V shaped ribs is presented as a function of parameters pertaining to roughness like angle of attack (α), and relative roughness height (e/D) and other relevant operating parameters. Analytical methods were used & governing energy balance equations are used to evaluate results. Plots on these aspects have been presented and discussed …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 4, Issue 3, 2017 · pp. 27–32 Read article