Researches on a Novel Gas Heat Pump with Multi-Stage Transmission Ratios

Abstract:

This study reviews current researches on gas heat pumps (GHP) in which the gas engine and the compressor are connected with a single-stage or fixed transmission ratio (engine’s speed/compressor’s speed). A novel concept of gas heat pump with multi-stage transmission ratios is presented in this paper. Compared with conventional GHP with a fixed transmission ratio, the novel GHP renders its engine to operate with a higher efficiency under more heating/cooling operation conditions to enhance the primary energy ratio (PER) further. Advantages from multi-stage transmission ratio connection, such as PER improvement and running speed extension of compressor are theoretically analyzed. Results show that GHP with multi-stage transmission ratios has a higher PER and broader compressor speed range, and in particular, through transmission ratio switch under different load conditions, it is beneficial for engine to run with higher efficiency during a whole-year operation.

• Periodical: Applied Mechanics and Materials (Volume 318)
• Pages: 7-10
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.318.7
• Online since: May 2013
• Authors: Hai Bo Zhao
• Keywords: Gas Engine, Gas Heat Pump, Transmission Ratio

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