Application of solar energy-valley electric energy storage heating systems in Beijing

In order to make reasonable use of low-valley electric energy, develops a set of solar energy-valley electric energy storage heating system. Taking a project in Beijing as an example, analyses the operation status and benefits of the system. The results show that solar collectors using phase-change energy storage materials can better solve the intermittent problem of solar energy utilization. The solar energy guarantee rate is basically maintained at about 20% in sunny days, and the environmental temperature has little effect on the solar energy guarantee rate relative to weather conditions. The use of solar energy-valley electric energy storage heating system reduces operating costs by 52.4% compared with coal-fired boiler systems, and can save 203.94 tons of standard coal annually. The utilization rate of valley electric in the system is 97.4%, which has the effect of peak shaving and valley filling.