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This paper proposes a new positive displacement compressor.
In this study, we propose an electrochemical compressor for the vapor compression refrigeration cycle running with ammonia or carbon dioxide as its working fluids.
Finally, a useful general equation for compressor designers is proposed to calculate the refrigerant leakage for a large range of operation conditions.
The simplified model is capable of evaluating linear compressor performance with refrigerants.
This paper presents a novel design method for an inherent capacity modulated linear compressor that uses R600a for application in household refrigerators.
Refrigerant injection is an effective method to improve the performance of the scroll compressor and its system under high compression ratio working conditions.
The developed model shows potential average savings of 59.3% in daily electricity costs while maximizing compressor life through minimization of compressor cycling.
This shows that the unit with digital scroll compressor is well adapted to the variable air volume running and good for the economical and reliable operation of the ducted AC unit.
The proposed model is detailed enough to account for the important phenomena influencing the suction and discharge mass flow rates and the electrical power drawn by the compressor, but simple enough to be usable for different reciprocating compressor designs with readily available data from manufacturers.

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