| Title |
Fluid Dynamic Performance in a Hot-Water Heating System with a Variable-Flow-Rate Balancing Valve |
| Authors |
허전(Jurn Hur) ; 이석종(Suk-Jong Lee) ; 성재용(Jae-Yong Sung) ; 이명호(Myeong Ho Lee) |
| Keywords |
가변유량 밸런싱밸브 ; 분배기 ; 캐비테이션 ; 온수 난방시스템 Variable-flow-rate balancing valve ; Distributor ; Cavitation ; Hot-water heating system |
| Abstract |
A variable-flow-rate balancing valve has been developed and optimized to apply to a distributor in a hot-water heating system. Fluid dynamic performance of the system was evaluated by comparing the results with the previous pressure difference control valve (PDCV) system. In view of the variations of pressure drop and flow rate according to the sequential closing of the control valves, the present system which is named “smart system distributor”, is very stable without a certain flow rate concentration. The level of pressure drop variation is also low as compared with the previous system with a PDCV. In view of the occurrence of cavitation, the present system is quite superior to the previous system because the instantaneous pressures at all sections are much higher than the vapor pressure. On the other hand, the previous system has a possibility of cavitation when one or more control valves are closed. |