2. Energy Conservation Technology for Buildings
Reducing the Transfer Power of Pumps
Reducing the Transfer Power of Pumps
| (1) | Adding an inverter to large, continuous-operation
pumps Operate chilled water and cooling water
pumps at 40 Hz rather than 50 Hz Flow rate 80%, head 64%, electrical power
51% |
| (2) | Control of the number of pumps by making the flow rate variable in the heat source piping system Change the 3-way valve control of the chilled water system to 2-way valve control, and control the number of pumps by varying the flow rate |
| (3) | Change the open circuits of the thermal storage tank to closed circuits Reduce the power by replacing the high-head circulating pump of the open water thermal storage tank with a low-head pump along with changing to a closed circuit on the secondary side and using a water-water heat exchanger. |
