Life Cycle Cost Analysis Of Solar Groud-source Heat Pump System

The hybrid solar-ground source heat pump system(HSGSHPS)is a new kind of building energy-using technology which combines the solar and the shallow layer geothermal source.It has theoretically superiority of energy-saving and emission-reduction for the system optimizes the advantage between the solar and the ground source heat pump and this system can solve the problem of the heating and cooling load imbalance in the GHEs which leads to the deterioration of the performance of the ground source heat pump system.For the complex of the HSGSHPS,it is necessary to use the whole life cycle cost analysis method to analyse the economical of the HSGSHPS.In this paper,the author puts the HSGSHPS in Hebei University of Technology as the object of study and establishes the chiller-gas boiler air conditioning system and the ground source heat pump-auxiliary electric heater air conditioning system as the comparable schemes.By collecting datas,simulating energy consumption and extensive field research,the author analysises the ecomomical performance of HSGSHPS though comparing the initial cost,operation cost and environmental cost between the HSGSHPS and the comparable schemes.At different equipment grades,the results shows that the initial cost of the HSGSHPS is always more than the comparable schemes,while its operation cost is always less than the comparable schemes.By comparing the environment cost between the HSGSHPS and the comparable schemes,the auther fides the HSGSHPS have advantage on emission-reduction for its CO2 emission is the lowest among the systems.In this paper,the author also uses the way of the trade-off analysis to analyse the operation cost and the initial cost of the HSGSHPS.The results show that: controling the initial cost of the HVACs,the HSGSHPS's opration cost should be below 1.95 and 1.11 at high-grade,2.54 and 1.17 at mid-grade,3.14 and 1.26 at low-grade of the comparable schemes.While controlling the opration cost of the HAVAs,the HSGSHPS's initial cost should be lower than 0.54 and 0.36 at high-grade,0.67 and 0.59 at mid-grade,0.67 and 0.59 at low-grade of the comparable schemes.