We often say that the solar drying performance in the solar water heater project is that the solar collector and the solar hot water engineering system do not inject heat transfer medium and only non-mechanically driven air, receive solar radiation without damage and aging. The ability to detect by air test. The following describes the detection of two solar water heaters.
1 Flat-plate solar collectors are installed outside the collector according to the orientation and inclination of the working operation. There should be no liquid heat transfer medium in the collector. The ambient temperature is >15 °C, and the collector lighting plane is accepted. Under the condition that the accumulated solar radiation amount is >16747kJ/m2 throughout the day, after the Id is placed, the damage and deformation of the collector are checked.
2 All-glass vacuum solar collector tube The air-drying performance parameter A/a)/G shall be tested in accordance with the national standard GB/T 17049-2005 “All-glass vacuum solar collector”. The test conditions are solar irradiance G≥800W/m2, ambient temperature 8°C≤fa≤30X:, “The air drying temperature when the all-glass vacuum solar collector tube uses air as the heat transfer medium.
3 The working medium of the vacuum tube type solar collector collector is air. Except for leaving the exhaust port, the other interfaces are sealed. Under the condition of ambient temperature ≥15°C and accumulated solar radiation ≥17000kJ/m2 throughout the day, the set will be set. After the heater is placed with the Id, the damage and deformation of the collector are checked.
4 Solar water heating project system There should be no liquid heat transfer working fluid in the solar water heating engineering system. Except for leaving the exhaust port, the other interfaces are sealed. At ambient temperature ≥15°C, the cumulative solar radiation amount is ≥17000kJ/m2 throughout the day. Under the condition, after the solar water heating system is placed for 2 days, the damage and deformation of the hot water system are checked.