TABLE OF CONTENTS - The Professional Green Building Council

Theme C: Education and Market TransformationYear Total Heating and Cooling Load300002500020000KWh150001000050000Room 1 Room 2 Room 3 TotalBasecase GCHS Model I GCHS Model IIChart 09: Annual Heating and Cooling Load.4. CONCLUSIONSThis study is an attempt to tackle sustainable concepts in new buildings byintroducing new and reliable means of passive techniques, such as naturalventilation system.The use of computation tool i.e. WinAir and HTB2 can predict complex CFDsimulations and energy performance of the ground cooling/heating systemsrespectively, allowing the comparison of results and the assessment of differentsolutions for final decision-making.The CFD analysis pointed out that controllable underground channel can generatewind channelled effects, acting efficiently in the improvement of wind flow inexternal areas, necessary to increase the thermal comfort levels of pedestrians.Alongside with these results, this system can be upgraded with turbines andproduce wind energy, with capacity to provide from 300 to 1,600kwh per year.The ground cooling/heating simulation results indicate that by introducing GCHSModel I, the building can reduce the energy consumption for heating/cooling by17.3%, by introducing GCHS Model II, the reduction will reach 23.3%. Theannual savings on heating and cooling energy are 4,480kwh for GCHS Model Iand 6,032kwh for GCHS Model II.636