Improvement of compressor efficiency using the alternative refrigerant is demanded strongly to reduce CO2 emission, which causes the global warming. Especially the compressor using in frozen temperature level has long lifetime, and the correspondence to above-mentioned is one of the most important subjects. The scroll compressor is the promising structure to solve this problem. A technical poin...

Abstract. The observations acquired during the full mission of Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) instrument, aboard European Space Agency Environmental Satellite (Envisat), have been analysed with version 8.22 Optimised Retrieval Model (ORM), originally developed as scientific prototype ESA level-2 processor MIPAS observations. results analyses included into 8 (l...

In Japan, the refrigerant used in room air-conditioners has been changed from HCFC-22 (R-22) to R-410A, a blend of HFC-32 and HFC-125 (50/50 vt%), in order to protect the ozone layer. Generally, the miscibility between the refrigerant and refrigeration oil must be assured, because the oil needs to return to the compressor from the refrigeration cycle and lubricate the sliding parts. Alternative...

The experimental investigation of a centrifugal compresso r is carried out to improve HCFC123 compression performance. A CFCll c ompressor applying HCFC123 shows a lowered adiabatic head rise, efficie ncy, and volume flow. Another CFC!l compressor with HCFC123 and a modifie d impeller shows a result comparable to the CFCll compression case. A tan dem impeller is designed to cover the volume flo...

In this paper the results of both modeling and testing a representative 3-ton air-to-air heat pump running with the baseline refrigerant (HCFC-22) and zero ODP alternative refrigerants will be presented. Alternative refrigerant simulation runs are made with two pure fluids (HFC-134a and HFC-152a) and an azeotropicmixture (60/40wt%) ofHFC-32 and HFC125 (Allied-Signal Inc. U.S. Patent 4,978,467)....

An inventory study of the energy use in cold storage installations in The Netherlands showed that frozen storage and combined chilled storage and distribution are responsible for a substantial part of the energy consumption of the sector. Two reference complexes including a standard number of refrigerated rooms can represent these two categories of plants. These reference complexes are used to ...