But the solar energy has intermittent and instability characteristics, so the heat storage material must be used to improve the utilization of solar energy to reduce the cost.

但是太阳能具有间歇性和不稳定性的特点，必须使用蓄热材料来提高太阳能的利用率、降低使用成本。

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The solar heat supply system improves the utilization rate of solar heat and reduces the utilization cost of the solar heat.

本发明提高太阳热的利用率，降低太阳热利用的成本。

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The energy consuming and the economic cost of the normal heat pump air-conditioning system and the solar air conditioning system are figured out.

本文还对常规空调系统与太阳能空调系统做了能耗比较和经济性分析。

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And the cost curve of the collection technology solar panels, small and large wind turbines, geothermal heat pumps, small hydro, tidal and wave technology, biomass converters is following the same cost curve dynamics as when we went from centralized mainframe computers to desktop computers and from centralized telephone communication to distributed cell phone networks.

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For example, if you plan to add geothermal heat pumps, residential small wind turbines or solar energy systems, the credit is equal to 30% of the cost with no upper limit.

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