H-18 The Development of Geothermal Air-conditioning System Using Ground Heat Exchanger utilizing Building's Cast-in-place Concrete Pile Foundation : (Part 12) The Development of the Performance Design Program to Improve Water-to-water Heat Pump Performance

Abstract

High performance water-to-water heat pump for ground source application was developed by using a plate heat exchanger, a new type of compressor and refrigerant cycle with a liquid-gas heat exchanger. First, the performance design program to compute the refrigerant cycle with a liquid-gas heat exchanger was created. The simulating program could predict heating/cooling capacity, electric power and COP by deciding surface area of heat exchangers, compressor efficiency, compressor displacement, etc. Secondly, the real heat pump was designed according to the result of the program and created and tested on performance to compare with the simulation.