The main equipments include: CPC collector array, heat storage facility, gas boiler, turbine generator unit, and condenser, water circulating pump, valves and pipelines.
This paper designs a solar-heated generation system with
10kW of electricity generation. The steam temperature at the
inlet of turbomachine is 250? with the inlet pressure is
The analysis of four typical working processes under the
different weather conditions is as follows:
(1) When the weather is fine, the steam at the outlet of
collector with high temperature can satisfy the request of
steam admission. Then open the valve V1, V2, and parts of
steam required enter the turbomachine for generating, while
the other steam enter the heat storage facility and deposited.
The boiler is out of work, and the valves V3, V4 are both
(2) When the weather is not good enough, the steam or
water at the outlet of collector can not satisfy the request of
steam admission of turbomachine. Now open the valve V2
and V4, and close the valve V1 and V3. The fluid at the
collector outlet enters the heat storage facility directly,
mixed with the original water in the container. The
preheated water enters the gas boiler, for heating to the
required steam of turbomachine for generating.
(3) When the weather is bad or it’s at night, the CPC
collector arrays are out of work nearly. Now close the valve
V1, V2, and open the valve V3, V4. The circled water is
delivered to the heat storage facility directly and is mixed
with the original hot water, and then enters the gas boiler.
This method can reduce the resistance loss when the water
flows through the CPC collector array.
(4) When the volume of saturated water in the heat
storage facility reaches to the 90% of the designed and the
temperature reaches to the saturation temperature, close the
valve V2 and open the blow-off valve, emptying the
redundant steam for protecting the heat storage facility. This
kind of state is rare, it appears only in several hottest weeks
The electricity generation flow processes of this paper can
ensure the system keeps generating steady under four typical
work conditions above in conjunction with the switch of