| Title |
The Experimental Study of the Heat Flux and Energy Consumption on Variable Flow Rate for Secondary Side of DHS |
| Authors |
Seong-Ki Hong ; Sung-Hwan Cho |
| DOI |
http://dx.doi.org/10.6110/KJACR.2015.27.5.247 |
| Keywords |
지역난방 시스템 ; 설정치제어 ; 외기보상 제어 ; 예측/최적제어 ; 난방제어 ; 실내온도제어 District heating system ; Set point control ; Outdoor reset control ; Predictive optimal control ; Heating control ; Indoor air temperature control |
| Abstract |
The presented work demonstrates the effects of flow rate on the secondary side of DHS (District Heating System). Increasing flow rate at the secondary side of DHS decreases energy consumption and time to reach the set-point of the heated room while increasing heat flux on the floor in the heating space. When flow rate increases, the overall heat transfer rate of radiant floor also increases. However, the results also show overall heat transfer rateto not increased linearly and thus the existence of an optimal flow rate for the secondary side of DHS. Control of the radiant floor with hot water may be more effectively accomplished with a combined control strategy that includes heat flux and a temperature set-point. This experimental analysis has been performed using a lab-scaled DHS pilot plant located at Jeonju University in Korea. |