Numerical Investigation on Energy Efficiency of a Serial Pipe-Embedded Window System Operated in Summer Considering Water Temperature Change in Pipeline
- 241 Downloads
Pipe-embedded window with low-grade energy can significantly reduce the cooling load of buildings. However, previous studies are generally based on the same water temperature for all the pipes, which is equivalent to parallel pipe-embedded window (PPW) and results in a very small temperature difference between inlet and outlet of pipes. A numerical model of serial pipe-embedded window (SPW) is developed, and the load reduction potential and performance of the SPW considering water distribution are studied in this paper. The results show that: (1) the SPW still has a satisfactory load reduction effect which is slightly less than that with the PPW; (2) the COP of the SPW system is far higher than that of the PPW system after considering water distribution; (3) the water temperature affects the indoor load more than the outdoor air temperature, and natural sources with temperature below 38 °C can be utilized effectively by a SPW for energy saving.
KeywordsNatural energy Pipe-embedded window Numerical simulation Building energy efficiency Space cooling
The project is supported by the China National Key R&D Program (No. 2016YFC0700302) and the China National Natural Science Foundation (Nos. 51578306 and 51638010).
- 7.Ministry of Housing and Urban-Rural Development: Technical Code for Ground-Source Heat Pump System (GB50366–2005). Beijing, China (2009)Google Scholar