Experimental Analysis on Phase-Change Heat Storage Materials PG and PE

A study on the thermal physical property of kind of phase-change heat storage materials is carried out to explorer the feasibility in the solar thermal storage area. Using the compacting-melting-absorbing-cooling method, the composite material of PE, PG and expanded graphite are made, the thermal conductivity of which is tested by the laser thermal conductivity tester. The results show that rising the content of the expanded graphite in the composite material will increase the heat conductivity coefficient in different directions respectively. This paper describes the preparation method and physical property test of the PE/PG- expanded graphite composite phase change material. The test results shows that the thermal conductivity in each direction of the material rises with the increase of the content of the expanded graphite in the composite.