A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Method for achieving hydraulic balance in typical Chinese building heating systems by managing differential pressure and flow
Abstract Hydraulic unbalance is a common problem in Chinese district heating (DH) systems. Hydraulic unbalance has resulted in poor flow distribution among heating branches and overheating of apartments. Studies show that nearly 30% of the total heat supply is being wasted in Chinese DH systems due to a lack of pressure and flow control. This study investigated using pre-set radiator valves combined with differential pressure (DP) controllers to achieve hydraulic balance in building distribution systems, and consequently save energy and reduce the emissions. We considered a multi-storey building modelled in the IDA-ICE software, along with a self-developed mathematical hydraulic model to simulate its heat performance and hydraulic performance with various control scenarios. In contrast to the situation with no pressure or flow control, this solution achieves the required flow distribution and close-to-design room temperatures, as well as 16% heat savings, 74% pump electricity savings, and proper cooling of supply water. The energy consumption savings would therefore have positive environmental impacts, and be reflected in seasonal reductions of 2.1 kg/m2 CO2, 0.02 kg/m2 SO2, and 0.01 kg/m2 NO x for 3rd step energy efficiency buildings in Beijing.
Method for achieving hydraulic balance in typical Chinese building heating systems by managing differential pressure and flow
Abstract Hydraulic unbalance is a common problem in Chinese district heating (DH) systems. Hydraulic unbalance has resulted in poor flow distribution among heating branches and overheating of apartments. Studies show that nearly 30% of the total heat supply is being wasted in Chinese DH systems due to a lack of pressure and flow control. This study investigated using pre-set radiator valves combined with differential pressure (DP) controllers to achieve hydraulic balance in building distribution systems, and consequently save energy and reduce the emissions. We considered a multi-storey building modelled in the IDA-ICE software, along with a self-developed mathematical hydraulic model to simulate its heat performance and hydraulic performance with various control scenarios. In contrast to the situation with no pressure or flow control, this solution achieves the required flow distribution and close-to-design room temperatures, as well as 16% heat savings, 74% pump electricity savings, and proper cooling of supply water. The energy consumption savings would therefore have positive environmental impacts, and be reflected in seasonal reductions of 2.1 kg/m2 CO2, 0.02 kg/m2 SO2, and 0.01 kg/m2 NO x for 3rd step energy efficiency buildings in Beijing.
Method for achieving hydraulic balance in typical Chinese building heating systems by managing differential pressure and flow
Zhang, Lipeng (author) / Xia, Jianjun (author) / Thorsen, Jan Eric (author) / Gudmundsson, Oddgeir (author) / Li, Hongwei (author) / Svendsen, Svend (author)
Building Simulation ; 10 ; 51-63
2016-07-22
13 pages
Article (Journal)
Electronic Resource
English
district heating , hydraulic balance , differential pressure controller , pre-set radiator valve , pressure and flow control , IDA-ICE Engineering , Building Construction and Design , Engineering Thermodynamics, Heat and Mass Transfer , Atmospheric Protection/Air Quality Control/Air Pollution , Monitoring/Environmental Analysis
Seismic performance evaluation of typical dampers designed by Chinese building code
| Online Contents | 2019
| British Library Conference Proceedings | 2003
Compensation for differential energy balance across a building incorporating solar energy systems
| Online Contents | 2011