Since the temperature is lower than Yangzi river basin or Yellow river basin which is 20 degree below zero. We had better use heat pipe solar collector because heat pipe solar collector features consists working under -50 degree. Flat plat type solar collector and vacuum pipe solar collection can't bear this low temperature. Industrial water consumption is big which need a large area of solar collector and require the collector is not easily damaged. For industrial use hot water, had better choose flat solar collector. The vacuum pipe collector is not suitable, for example, average of 8 ‰, breakage and a tube burst will lead to paralysis of the whole system.