Seawater Central Heating HYY Ground Sourced Heat Pump System for Rebuilding the Central Heating Project in a Middle School of Dalian

Abstract

This is first one in China to use seawater medium-ground sourced heat pump system for rebuilding the Central Heating Project in a Middle School of Dalian. The system takes the seawater as a thermal medium to collect the low grade thermal energy from the shallow rock soil layer near the Sea and around the heat exchange well. The seawater temperature in the well can reach the shallow ground temperature of about 15°C. HYY (Heng You Yuan Co.) ground sourced heat pump system is used to provide the winter heating for the building. The operation result of the system in the last winter season proves to have a very good coefficient of performance COP = 3.19 and the Renewable energy resource use of ? = 68.7%. The room temperature in the classrooms in the daytime in the winter is 18-23°C. The average heating expenses (electric fee) in the heating season is $1.7USD/m2. The local heating standard fee is $3.8USD/m2 in the heating season, so the system only used 44.3% of this fee. The system saves a coal of 192 ton per year. During the system operation, there is no CO2, SO2 and particles emitted. The system can perfectly protect the seawater, groundwater and rock-soil layer from pollution. This successfully project is a good example to spread the system application in Dalin area and along the coast of China in the future.