TABLE OF CONTENTS - The Professional Green Building Council

Theme C: Education and Market Transformationprovide from 300 to 1,600kwh per year, if considered a maximum efficiency forelectricity generation of 28% in this system and 30% of the day with thisprevailing wind direction.3. THE GROUND COOLING/ HEATING SYSTEMPERFORMANCE SIMULATIONThe area where the Art College locates has a climate pattern of hot summer (up to34.8 o C) and cold winter (as low as -9.0 o C) as given in Table1. The demand onusing coal or electricity for heating in winter and cooling in summer could beconsiderable, so it is important to find ways to reduce the building energyconsumption. A Ground Cooling/ Heating System (GCHS) is recommended hereto provide passive heating and cooling services to minimize energy requirementand to provide thermal comfort [8].The system's basic concept takes advantage of the earth's constant temperature,approximately 12 degrees, to preheat or cool the air entering the building thusreduce heating and cooling energy demand. A GCHS usually consists of air inlet,underground pipes and air outlet. The external air is collected into the air inletlocated outside the building, channelled through air pipes planted under ground toexchange heat, and the air then is collected at the outlet before it enters thebuilding (Fig. 17). Usually a nearby large open area (e.g. parking lot or openground) is needed to plant the pipes. In this project, the buildings are surroundedby green space, so it is not difficult to find a spot for underground pipes.Figure 17: Ground Cooling/Heating System.632