A new ground source heat pump system combined with radiant heating/cooling is proposed, and the principles and the advantages of the system are analyzed. A demonstration of the system is applied to a rebuilt building...A new ground source heat pump system combined with radiant heating/cooling is proposed, and the principles and the advantages of the system are analyzed. A demonstration of the system is applied to a rebuilt building： Xijindu exhibition hall, which is located in Zhenjiang city in China. Numerical studies on the thermal comfort and energy consumption of the system are carded out by using TRNSYS software. The results indicate that the system with the radiant floor method or the radiant ceiling method shows good thermal comfort without mechanical ventilation in winter. However, the system with either of the methods should add mechanical ventilation to ensure good comfort in summer. At the same level of thermal comfort, it can also be found that the annual energy consumption of the radiant ceiling system is less than that of the radiant floor system.展开更多
The Iraqi climate is extremely hot and arid zone covers a belt between latitude （29°N to 36°N）. The energy required for air conditioning of Iraqi buildings is about 60% of the entire energy consumption in ...The Iraqi climate is extremely hot and arid zone covers a belt between latitude （29°N to 36°N）. The energy required for air conditioning of Iraqi buildings is about 60% of the entire energy consumption in buildings. This research deals with the possibility of using different technics for the reducing energy consumption in buildings by blocking or eliminates the effect of direct solar radiation in summer season. This study deals with different local insulation materials which were added to the south face of walls surface of Iraqi buildings, as well as built water spray system upon the exterior roof surface to minimize the effect of incident solar radiation upon the roofs and wall surfaces. The results showed that thermal conductivity of local insulation materials （papyrus） are very low, also the results showed that when using water spray roof system, gives good indication to use this method in hot arid rejoins.展开更多
基金The National Natural Science Foundation of China(No. 51036001 )the Natural Science Foundation of Jiangsu Province(No. BK2010043)
文摘A new ground source heat pump system combined with radiant heating/cooling is proposed, and the principles and the advantages of the system are analyzed. A demonstration of the system is applied to a rebuilt building： Xijindu exhibition hall, which is located in Zhenjiang city in China. Numerical studies on the thermal comfort and energy consumption of the system are carded out by using TRNSYS software. The results indicate that the system with the radiant floor method or the radiant ceiling method shows good thermal comfort without mechanical ventilation in winter. However, the system with either of the methods should add mechanical ventilation to ensure good comfort in summer. At the same level of thermal comfort, it can also be found that the annual energy consumption of the radiant ceiling system is less than that of the radiant floor system.
文摘The Iraqi climate is extremely hot and arid zone covers a belt between latitude （29°N to 36°N）. The energy required for air conditioning of Iraqi buildings is about 60% of the entire energy consumption in buildings. This research deals with the possibility of using different technics for the reducing energy consumption in buildings by blocking or eliminates the effect of direct solar radiation in summer season. This study deals with different local insulation materials which were added to the south face of walls surface of Iraqi buildings, as well as built water spray system upon the exterior roof surface to minimize the effect of incident solar radiation upon the roofs and wall surfaces. The results showed that thermal conductivity of local insulation materials （papyrus） are very low, also the results showed that when using water spray roof system, gives good indication to use this method in hot arid rejoins.
