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59 articles for “Co-efficient of performance (COP).”
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Waste Heat Driven Hybrid Refrigeration System: A Review
Abstract: The objective of this paper is to describe a newly-developed hybrid refrigeration system .This hybrid refrigeration system , combination of a vapor compression refrigeration system driven by the high grade electrical energy and heat driven an absorption refrigeration system .Absorption system activated by waste heat available from the condenser of vapour compression system to produce the required necessary temperature in generator to vaporize refrigerant. However an electrical heater in the …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 7, Issue 2, 2020 · pp. 49–57 Read article
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Analysis of Earth Air Heat Exchanger (EAHE) for Storage system
Abstract: Geothermal energy is one of the potential alternative sources of energy which has been successfully catering to both industrial and domestic energy requirements. The temperature of earth at a certain depth about 2 to 5 m the temperature of ground remains nearly constant throughout the year. This constant temperature is called the undisturbed temperature of earth (EUT) which remains lower than the outside temperature in summer. In this research, a …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 5, Issue 1, 2018 · pp. 1–9 Read article
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Efficiency improvement in aerothermal household heating systems
Abstract: This paper shows a new method to improve the aerothermal household heating system. The development bases the design on a forced convection assistance unit attached to the water radiators used for heating the house. The proposed design applies to any household heating system with wall radiators powered by an aerothermal unit. The household heating protocol is enhanced thanks to a quicker rate of room temperature rising, which allows setting up …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 10, Issue 3, 2023 · pp. 1–15 Read article
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Compact PV-PCM System with Heat Recovery Unit for Cogeneration System
Abstract: This paper studies the feasibility of developing a compact system based on a photovoltaic panel with a heat exchanger embedded in a phase change material (PCM) attached to the rear side of the panel. The system generates electric energy at the PV panel, and thermal energy using the removed heat from the panel. The paper analyzes the improvement in PV panel efficiency and the Coefficient of Performance (COP) of the …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 14, Issue 1, 2024 · pp. 13–24 Read article
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Exploring the Applications and Advancements of Copper and Copper Alloys in Modern Manufacturing Processes
Abstract: For industrial uses, copper represents one of the greatest technical materials offered. This review paper discusses on the history of copper and copper alloys, salient features of wrought and cast copper alloys, physical and chemical characteristics of copper alloys, classification of copper alloys, design for manufacturing of copper alloys, mechanical properties of cast copper alloys, role of lead in copper alloys and applications of copper alloys in various engineering industries. …
Published in International Journal of Industrial and Product Design Engineering · Vol. 1, Issue 2, 2023 · pp. 1–9 Read article
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An Exergetic based Assessment of Biogas as an Energy Source in a Hybrid Refrigeration System
Abstract: The analysis of biogas operated Ammonia-Water vapor compression absorption (hybrid) refrigeration system was carried out based on computational model being developed and the thermodynamic properties of working fluids have been used from the computer code. The variation of performance parameters such as exergy loss, COPCOOLING, COPHEATING and Exergy efficiency are studied with varying generator temperature, evaporator temperature, condenser and absorber temperature. The results indicate that maximum COP cooling as well …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 1, Issue 2, 2014 · pp. 31–40 Read article
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Cogeneration System in Concentrated Photovoltaic Panels
Abstract: This study analyses the behavior of hybrid systems composed of photovoltaic panels (PV) and phase-change materials (PCM) under solar concentration conditions, aiming to generate electric and thermal energy in water simultaneously (cogeneration). This work looks for system performance improvement while increasing the generated power and energy by the PV panel and the thermal system in unison. The study shows the increase in power and energy delivered by the prototype compared …
Published in Journal of Thermal Engineering and Applications · Vol. 11, Issue 2, 2024 · pp. 1–14 Read article
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Indoor Room Air Conditioning Using External Enclosure
Abstract: This paper presents a new air conditioning system using an external air chamber enclosure. The system is based on evaporative refrigeration technique humidifying hot air from the environment by means of a new design humidifier. Temperature at the air chamber is set up according to the required comfort conditions. The air chamber plays the role of a heat collector from indoor room radiative energy. This new system avoids thermal gradient …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 7, Issue 2, 2020 · pp. 7–21 Read article
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Energetic and Exergetic Investigation on Vapor Compression Refrigeration System Using Ag₂O-R134a Nanofluid as Refrigerant
Abstract: This paper experimentally explored energetic and exergetic performance investigation of VCR System using Ag₂O-R134a Nanofluid as Refrigerant. The integration of silver oxide (Ag₂O) nanoparticles within polymer and composite materials offers promising avenues for enhancing the thermal and physical properties of advanced systems. The energetic and exergetic performance study of VCR were investigated with test parameters including compressor power consumption, cooling capacity, coefficient of performance (COP), discharge temperature, irreversibility in the …
Published in Journal of Polymer & Composites · Vol. 14, Issue 1, 2026 · pp. 279–287 Read article
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Design and Investigation of Peltier Technology for Automobile Air-Conditioning Unit
Abstract: AbstractIn recent years, market of heating, ventilation and air-conditioning system (HVAC) has escalated a lot. These units provide cooling and conditioned atmosphere to automobiles, buildings, cold storage etc. HVAC units are very reliable and effective but they produce some adverse impact on environment. This paper proposes the use of solar energy with thermoelectric (Peltier) technology. In order to determine the efficiency of solar energy assisted thermoelectric module, it is necessary …
Published in Journal of Microelectronics and Solid State Devices · Vol. 6, Issue 3, 2019 · pp. 37–42 Read article
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Recent Advances to Compare the Performance of Domestic Refrigerator Using New Eco-friendly Refrigerants
Abstract: This paper presents the performance comparison of new eco-friendly refrigerants in domestic refrigerator with respect to energy and exergetic analysis. To make an alternative arrangement of R12 or R134a, and for comparing the performance of new refrigerants some factors and technologies are important which is required to be considered likes their thermodynamics properties, GWP, ODP, energy and exergy analysis, TEWI analysis. In the ongoing work many experimental investigations were made …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 8, Issue 3, 2021 · pp. 18–29 Read article
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Effect of ETL layer thickness on perovskite (CH3NH3PbI3) solar cell
Abstract: Abstract: Thickness of ETL (Electron transport layer) shows important role in term of stability and efficiency of perovskite solar cells. In this paper the numerical simulation and extensive modeling have been performed on perovskite solar cell using perovskite material such as methyl ammonium lead Iodide (MAPbI3, MA=CH3NH3) with the help of SCAPS tool. The electrical properties of the MAPbI3 material used as active layer, have been calculated for different parameter …
Published in Trends in Opto-electro & Optical Communication · Vol. 9, Issue 1, 2019 · pp. 32–37 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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An Experimental Study to Determine Optimum Machining Conditions for Electrical Discharge Machining of the Heat Treatable Steel 42CrMo4 (Din 1.7225)
Abstract: Electric discharge machining (EDM) is a well-established machining option and a non-traditional machining process, in many manufacturing-related industries worldwide. It is found to be capable of machining geometrically complex or hard material components, which are specific and difficult-to-machine. In this study, the electrical discharge machining of 42CrMo4 with different electrode materials namely, copper, aluminum and tungsten carbide and process parameters was performed to explore the influence of EDM parameters on …
Published in Journal of Mechatronics and Automation · Vol. 2, Issue 2, 2015 · pp. 23–32 Read article
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Rotation Invariant Copy-Move Image Forgery Detection Using a Method Based on Fuzzy-Zernike Moments
Abstract: AbstractWithout leaving any visual clue, digital images are easy to manipulate due to the availability of countless editing software packages. Any image manipulation can become a forgery. Copymove forgery is a very common method of creating forge images by copying some part of the image and pastes it on the same image. In this paper, we propose a copy-move digital image forgery detection method using Fuzzy-Zernike Moments. The proposed method …
Published in Journal of Computer Technology & Applications · Vol. 7, Issue 2, 2016 · pp. 58–68 Read article
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Enhancing the Performance of Evacuated Tube Heat Pipe Solar Collector Using CuO Nanofluid
Abstract: Renewable energy is an important component of sustainable development technologies that meet current demands without risking future generations' ability to meet their own. Due to fast expanding energy consumption and environmental concerns, many international scholars are seeking an alternate approach to fulfill future energy demand. Due to its abundance and pure nature, solar energy appears to be the most enticing option in this case. Because of their ease of use, …
Published in Journal of Polymer & Composites · Vol. 11, Issue 8, 2023 · pp. 393–407 Read article
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Performance Analysis of FLC-NR based Loss Minimisation Algorithm for BLDC Motor
Abstract: Brushless DC motors are increasingly used in industry due to their high power density and ease of control. Efficiency of BLDC motor is reduced due to various losses like copper loss, core loss and switching loss. A fuzzy logic based loss minimisation algorithm is described in this study. Selective harmonic elimination-based pulse-width modulation to optimise both the converter switching losses along with machine core and copper losses is done based …
Published in Trends in Electrical Engineering · Vol. 8, Issue 3, 2018 · pp. 51–59 Read article
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Optimization of Performance Parameters for Material Removal Rate in Side Flushing Form of Die Sink EDM
Abstract: In the present scenario, electrical discharge machining (EDM) is a well-established machining option for manufacturing geometrically complex or hard material parts that are extremely difficult to machine by conventional machining processes. EDM researchers have explored a number of ways to improve the efficiency including some unique experimental concepts. The operating performance measures of side flushing type of electrical discharge machining process on EN-31 die steel using copper electrode are being …
Published in Trends in Mechanical Engineering & Technology · Vol. 2, Issue 1, 2012 · pp. 7–14 Read article
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Investigation of Exergy and Energy with Fibre Reinforced Plastic Composite (FRP) Tube Based Solar Still using PCM material via Theoretical and Computational Approach
Abstract: A FRP (Fibre Reinforced Polymer) material-based solar still is an advanced design approach in solar desalination systems, where the traditional construction materials (like metal or concrete) are replaced or enhanced with FRP composites. A FRP composite material tubular solar still is a lightweight desalination equipment with a substantial condensing area in comparison to other types of solar stills. Nonetheless, their effectiveness is often limited by fluctuating climatic circumstances. This study …
Published in Journal of Polymer & Composites · Vol. 14, Issue 1, 2026 · pp. 66–78 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