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82 articles for “Refrigeration temperature”
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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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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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Molecular Interaction Study of Glycine in Aqueous Lactose Solution Using Volumetric, Acoustic and Viscometric Methods at Different Temperatures
Abstract: Normal 0 false false false EN-US X-NONE X-NONE Density, viscosity, sound speed and refractive index of glycine in aqueous lactose solution at varying concentrations from 0.1035 to 1.0345 m at 298, 308, and 318 K have been determined using precalibrated bycapillary pycnometer, Ostwald’s viscometer and single frequency ultrasonic interferometer at 2 MHz frequency respectively. The derived acoustic parameters like apparent molal volume( ), apparent molal compressibility( ), specific acoustic impedance …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 3, Issue 1, 2012 · pp. 17–27 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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Heat Transfer in Single Effect Solar Assisted LiBr-H2O Absorption Refrigeration Cycle
Abstract: This paper describes the heat transfer model of LiBr-H2O vapour absorption cooling system implemented in engineering equation solver (EES). The detailed first law analysis of the system is presented. Effects of operating temperature and pressure on the heat load in various components, coefficient of performance (COP), and circulation ratio of the system have been carried out. Impact of solution heat exchanger effectiveness on system performance is also studied. The study …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 7, Issue 2, 2016 · pp. 1–11 Read article
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Experimental and CFD Analysis on a Hybrid Cooler
Abstract: AbstractSince the invention of air conditioners, it has been used widely all over the world. The harmful effects of ACs cannot be ignored as far as the environment is concern. AC being widely used, needs a suitable alternative for sustainable goals to be achieved. Air conditioning with the help of forced ventilation system is studied in this research work. Its implementation and effects on the room temperature is studied in …
Published in Journal of Thermal Engineering and Applications · Vol. 6, Issue 3, 2019 · pp. 1–8 Read article
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Mathematical Study and Steady-State Modeling of Simple Vapour Adsorption Refrigeration System
Abstract: Abstract This paper discusses the mathematical formulation for various heats involved during different processes of a simple vapour adsorption refrigeration cycle having activated carbon and methanol as the active working pairs. This formulation is further used and a detailed analysis of the cycle’s performance is studied based on a steady-state model prepared on the FORTRAN77 platform compiler. The analysis includes effects of the input parameters of the cycle such as …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 3, Issue 3, 2016 · pp. 1–13 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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Refrigeration System Performance and Energy Optimization in Food Preservation and Cold Chain Logistics
Abstract: A vital part of the food preservation sector, refrigeration guarantees the durability, security, and quality of perishable food items in the supply chain. The food cold chain, which encompasses the refrigeration systems used during storage, transportation, and distribution, is integral to maintaining food safety and minimizing waste. However, as the global demand for food increases and sustainability concerns rise, energy consumption in refrigeration systems presents a major challenge. Efficient refrigeration …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 12, Issue 1, 2025 · pp. 22–29 Read article
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Evaluating the Performance of a Smart VCR System Using Python for Data Analysis Based on IoT
Abstract: Commercial buildings use a significant amount of electricity, with around 60% to 80% being attributed to the HVAC system. Implementing IoT and smart sensors can help reduce this consumption by 10% to 30%. To lower the electricity usage of air conditioners, a study has proposed an IoT-based smart VCR system with sensors, meters, gateway, and cloud computing modules. This system is designed to collect data and regulate the VCR system …
Published in Journal of Control & Instrumentation · Vol. 15, Issue 2, 2024 · pp. 7–23 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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Phase Change Material in the Heat Exchanger for Improved Performance of Latent Refrigeration Storage Systems
Abstract: Using phase change materials (PCMs) in conjunction with a latent cool storage system is an efficient method of storing cool energy. It has the advantage of storage process with isothermal nature and storage of high energy density. Within last few years it has been inspected that in cool storage applications, PCM’s have been widely used. PCM’s are melted and solidified at wide ranges and temperatures and hence are attractive in …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 10, Issue 2, 2023 · pp. 19–29 Read article
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Solar Humidity Control Unit with Hot Water Generation
Abstract: Abstract Our country lying in tropical region predominantly has high humidity in air in nearly three-fourth span of a year. Maintaining indoor comfort conditions in these conditions become expensive. This paper presents the design of an all-in-one solar-powered humidity control unit which will also provide hot water in the building. The configuration consists of indoor and outdoor units provided with evaporative coolers and desiccant units. The outdoor unit is coupled …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 2, Issue 3, 2015 · pp. 5–10 Read article
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HVAC Design by Using Green Building Norms
Abstract: An HVAC system can be describing as a system which removes the heat from a desired space by pumping the heat from one place to another which result a cooling effect, also by lowering the temperature. HVAC work for a good indoor air quality by using latest filtering technologies. The major components of the HVAC system are, Heat exchanger, Evaporator coil, Thermostat, Refrigerant lines, Condensing unit, drain piping system, electrical …
Published in Journal of Production Research & Management · Vol. 11, Issue 3, 2021 · pp. 1–10 Read article
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Automation of Heat Exchanger System using DCS
Abstract: Heat exchangers are built for efficient transferring heat from one fluid to another. They have an extensive demand in areas such as petroleum, refineries, chemical plants, petrochemical plants, natural gas processing, refrigeration, power plants, air conditioning, space heating and process industry. Automation of Heat exchange can be done optimally using PID Block. Using PID function block the outlet fluid temperature can be maintained as desired. The automation of Shell and …
Published in Journal of Control & Instrumentation · Vol. 5, Issue 1, 2014 · pp. 22–28 Read article
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Design of Ducts: An Industrial Perspective
Abstract: Central Air Conditioners working is a complex and cumbersome topic which takes a lot of time and effort. It’s a difficult task to explain the entire parts, its working and maintenance. Here an effort is made to explain about the designing of Ducts used in a central A/C. A Commercial building is taken for reference and each floor’s Duct designing is explained. The ground floor is designed with supply air …
Published in Journal of Production Research & Management · Vol. 10, Issue 1, 2020 · pp. 18–24 Read article
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Zero Energy Cool Chamber (ZECC): A Unique Low-cost Food Preservation System
Abstract: Zero energy cool chamber (ZECC) is an environment friendly or eco-friendly and low-cost post-harvest technology which can be made up with locally available low-cost materials like brick, sand etc. For this reason, it can easily be constructed in rural and remote areas. It is mainly used to store fruits and vegetables. It does not need any electricity, that is why it also saves energy. Temperature and humidity are two important …
Published in Research & Reviews : Journal of Agricultural Science and Technology · pp. 16–22 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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Dynamic Simulation of Load-Responsive Vapor Compression Refrigeration Systems
Abstract: Because of their dependable operation and effectiveness, vapor compression refrigeration systems, or vapor compression refrigeration (VCRS), have become popular in commercial, industrial, and residential settings. However, under different thermal loads, classic vapor compression refrigeration (VCR) systems may perform less well in that they are usually built for steady-state conditions and run at consistent speeds. In order to improve a load-responsive VCR system’s flexibility, energy efficiency, and response to changing cooling …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 12, Issue 2, 2025 · pp. 32–37 Read article
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A Review Paper on Performance Evaluation and Enhancement of Cooling Tower
Abstract: Abstract Cooling towers are commonly used to reject heat from condenser water, heat exchanger, and other processing equipment. A cooling tower cools the hot water by a combination of heat and mass transfer. Energy and mass transfer through cooling tower play significant roles in cooling water temperature. Specifically, the work aims to conduct a detailed analysis of the heat and mass transfer processes in a natural draft wet cooling tower, …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 3, Issue 2, 2016 · pp. 37–40 Read article