There is a danger of output suppression of high‐penetration residential photovoltaic systems due to voltage increase. It is necessa1ry to install new technology to prevent the occurrence of such phenomenon. Therefore, we focused our attention on heat‐pump water heaters (HPWHs). HPWHs are usually used to heat water during nighttime because electricity prices are cheaper than during the daytime for the load leveling in Japan. So they can be used as a countermeasure without additional cost if they are operated during the daytime. However, HPWHs do not have sufficient capacity to absorb inverse energy at each residence. Thus, HPWH operation must be optimized to minimize output suppression loss. In this research, we selected four typical sunny days in spring, summer, autumn, and winter. The optimal HPWH operation was calculated by numerical simulation. The optimal monthly HPWH operation was investigated using the weather forecast assuming actual operation in each season.
Prevention of Output Suppression through Heat Pump Water Heaters for High‐Penetration Residential PV Systems for Long‐Term Operation
Electrical engineering in Japan ; 201 , 2
2017
Aufsatz (Zeitschrift)
Englisch
Indirect Solar-Assisted Heat Pump Hot Water Heaters for the Canadian Environment
British Library Conference Proceedings | 1998
|STABILIZING LOOP HEAT PIPE OPERATION WITH CONTROL HEATERS
TIBKAT | 2019
|Heat exchanger for solar water heaters
NTRS | 1977
|