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Performance enhancement and optimization of residential air conditioning system in response to the novel FAl2O3-POE nanolubricant adoption [PDF]
Heliyon, 2023 This paper aims to evaluate residential air conditioning systems' performance enhancement and optimization by adopting a novel functionalized Al2O3 (FAl2O3)–Polyolester (POE) nanolubricant.
A. Nugroho +5 more
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Energies, 2021 The detection and diagnosis of faults is becoming necessary in ensuring energy savings in heat pump units. Faults can exist independently or simultaneously in heat pumps at the refrigerant side and secondary fluid flow loops. In this work, we discuss the
Samuel Boahen +4 more
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Refrigerant Charge Prediction of Vapor Compression Air Conditioner Based on Start-Up Characteristics
Applied Sciences, 2021 Refrigerant charge faults, which occur frequently, increase the energy loss and may fatally damage the system. Refrigerant leakage is difficult to detect and diagnose until the fault has reached a severe degree.
Yechan Yun, Young Soo Chang
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Fault detection model for a variable speed heat pump
Journal of Engineering and Applied Science, 2023 The impact of the COVID pandemic has resulted in many people cultivating a remote working culture and increasing building energy use. A reduction in the energy use of heating, ventilation, and air-conditioning (HVAC) systems is necessary for decreasing ...
Samuel Boahen +6 more
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Experimental Study of an Air-Conditioning System in an Electric Vehicle with R1234yf
Energies, 2023 R134a, a vehicle refrigerant used in the vehicle heat pump system, is regulated according to the Montreal Protocol. Refrigerants such as R1234yf, R744, and R290 in vehicle heat pump systems are being investigated to identify their alternatives.
Jeonghyun Song +8 more
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Energies, 2021 With the rapid increase of heat flux and demand for miniaturization of electronic equipment, the traditional heat conduction and convective heat transfer methods could not meet the needs.
Nianyong Zhou +7 more
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Refrigerant Charge Fault Detection and Diagnosis Algorithm for Water-to-Water Heat Pump Unit
Energies, 2019 Refrigerant charge faults have a great adverse effect on the performance of heat pumps and must therefore be detected and diagnosed early in real time. In this study, the effect of refrigerant charge faults on a water-to-water heat pump is experimentally
Samuel Boahen +2 more
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Experimental Study on Heat Transfer Performance of Closed-loopSpray Cooling Using R134a
Zhileng xuebao, 2021 In this study, an R134a closed-loop spray cooling system was built to investigate the effects of flow rate, subcooling degree, and refrigerant charge on the steady spray cooling heat transfer performance.
Zhou Nianyong +5 more
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Energies, 2017 Besides compressor rotary speed and parameters of water flowing through gas cooler and evaporator, refrigerant charge amount and electronic expansion valve (EEV) opening are two important parameters that have significant effects on the performance of a ...
Ze Zhang +4 more
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Performance comparison of the single-refrigerant cascade refrigerating system
Energy Reports, 2022 In the food refrigeration industry, the single-stage compression refrigerating system cannot meet the operating conditions of a high-pressure ratio when the evaporating temperature decreases.
Zhili Sun +11 more
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