“直接替代”一词已经迁移到现在的R22阶段。目前,已有超过20种基于HFC的R22系统改造用制冷剂。然而,HFC不与矿物油混溶,而是通常需要使用合成润滑剂,如PAG、POE(多元醇酯)或PVE(聚乙烯醚)润滑剂。此外,R22系统改造用制冷剂型都是混合制冷剂,其在所有情况下的表现都不会与R22这样的单组分制冷剂相同。 一些制冷剂...
K.V. Sharma et.al.: Prediction of pressure drop of refrigerants for two phase flow inside a horizontal tube using CFD analysis, ARPN Journal of Engineering and Applied Sciences, Vol. 4,No. 9, November 2009, pp 64-71.Bhramara P. et al 2009. Prediction of pressure drops of refrigerants ...
Several refrigerants have emerged as substitutes to replace R22, the most widely used fluorocarbon refrigerants in the world. These include the environment... V Jain,SS Kachhwaha,RS Mishra - 《International Journal of Energy & Environment》 被引量: 17发表: 2011年 Exergy analysis of a Vapour ...
Reliable and comprehensive predictive tools for the frictional pressure drop (FPD) are of particular importance for systems involving two-phase flow condensation. However, the available models are only applicable to specific operating conditions and chan
Working under high reduced pressure conditions, CO2 and some novel substitute refrigerants, such as R404a and R410a, are known as the “high-pressure” fluids. One significant feature of these refrigerants is that their vapour densities are higher than those of the conventional refrigerants, such ...
Water cooling unit drop in cool room units condensing unit refrigeration Product Features This condensing unit uses advanced European technology, making it perfect for cold storage, food processing, cold chain logistics, etc. It features eco-friendly refrigerants, excell...
measured data and those predicted by the correlation were testified with AARE of 9.51%. Jige et al36. estimated the two-phase multiplier using their experimental data for condensation of four different refrigerants in multiport mini-channels, and obtained a reasonable accuracy with AARE of 9.6%....
The thermodynamic analysis of direct expansion solar-assisted heat pump system working with R290 as a drop-in substitute for R22 was carried out under the metrological conditions of Calicut, India. A prototype of a DXSAHP system consists of a compressor, an air-cooled condenser with evaporator–...
Outdoor cold room condensing unit cool room drop in units cooling unit for cold room Product Features This condensing unit uses advanced European technology, making it perfect for cold storage, food processing, cold chain logistics, etc. It features e...
T., 1996a, “Pressure Drop of Pure HFC Refrigerants and Their Mixtures Flowing in Capillary Tubes,”Int. J. Multiphase Flow, Vol. 22, No. 3, pp. 551–561.MATHView Article Chang, S. D., and Ro, S. T., 1996b, “Flow Characteristics of Refrigerant Mixtures with R32 in a Capillary...