Study On Ground-coupled Heat Pump Combined With Ice Storage Air-conditioning System

With the development of economy, energy shortages have become increasingly prominent, new requirements are proposed on the building's air-conditioning. Ground-coupled heat pump combined with ice storage air-conditioning system is becoming more and more focus of the world's attention because it has the advantages of ground-coupled heat pump system and ice storage system. In order to popularize and apply this technology better, put up many advantages of ground-coupled heat pump system and ice storage system in the actual engineering, achieve better social and economic benefits, the accurate and logical design method of ground-coupled heat pump combined with ice storage air-conditioning system is needed.This thesis has designed a ground-coupled heat pump system for a given building of Jinan, analyzed the energy consumption and the economical quality of the system.First of all, the hour by hour air-conditioning load of the building is calculated in a whole year by the DEST software. On the basis of this, the monthly cooling and heating loads and the annual air-conditioning load are calculated. For the determination of system design, energy analysis and economic comparison, the typical design day hourly cooling load,75% of the typical design day hourly cooling load and 50% of the typical design day hourly cooling load are calculated.Secondly, according to load conditions, a ground-coupled heat pump system for the given building is designed. The system's operating strategy, process configuration, control strategy and optimization of heat exchanger design is analyzed and a optimal design is established.The mathematics mode has been established of the heat pump. Using GeoStar V3.0 and other auxiliary software, the annual power consumption of heat pump unit is calculated when the system operating 15 years. The running costs are calculated by the basis of Shandong Province TOU.The mathematics mode has been established of the pump. The power consumption and the running costs of the pumps are calculated.Finally, This thesis analyzes and compares the economical quality of the four systems: the chiller+urban heat supply network system, the ice storage+urban heat supply network system, ground source heat pump system and ground-coupled heat pump combined with ice storage air-conditioning system, by tow methods:payback period of investment and the average annual operating cost. The results show that the ground-coupled heat pump combined with ice storage air-conditioning system has suitable payback period of investment and the lowest average annual operating costs.