Solar water heater quality appraisal

Solar water heater is a device that uses solar energy to heat water. It consists of a collector, water tank, pipeline and control system. It uses solar energy as energy, converts solar energy into thermal energy through a collector, and then conducts the thermal energy to the water in the water tank to heat the water.
solar water heater has the advantages of energy saving, environmental protection, easy installation, stability and reliability, and long service life. It is widely used in family life, commercial and industrial fields. But it also has the disadvantages of being affected by weather and having higher cost.
In the case of solar water heater quality appraisal, Zhongke Testing can provide solar water heater quality appraisal services.

can be divided into: vacuum glass tube solar water heater and flat plate solar water heater from the heat collection part.
can be divided into ordinary solar water heaters and split solar water heaters from a structural point of view.
can be divided into pressure-bearing solar water heaters and non-pressure-bearing solar water heaters according to the pressure of the water tank.
can be divided into: circulating type, direct flow type and integral solar water heater according to its water flow direction.
can be divided into according to the access method: According to the access method, it can be divided into: sun-drying type, flat plate type, vacuum tube type, heat pipe type, split type (wall-mounted type) {can be divided into pressure-bearing type and non-pressure-bearing type according to the pressure-bearing capacity}, and embedded.

GB/T 29724-2013 Energy monitoring of solar water heating system
GB/T 35606-2017 Green product evaluation Solar water heating system
GB/T 19141-2011 Technical conditions of household solar water heating system
GB/T 24798-2009 Rubber seals for solar water heating systems
GB/T 23888-2009 Household solar water heating system controller
GB/T 30532-2014 All-glass heat pipe household solar water heating system
GB/T 30724-2014 Technical specifications for solar water heating systems for industrial applications
GB/T 28746-2012 Technical requirements for water storage tanks in household solar water heating systems
GB/T 28745-2012 Test methods for water storage tanks in household solar water heating systems
GB/T 25966-2010 Technical requirements for household solar water heating systems with electric auxiliary energy
0GB/T 25969-2010 General technical conditions for material selection of main components of household solar water heating systems
1GB/T 34377-2017 Technical specifications for application design, installation and acceptance of household solar water heating systems
2GB/T 26970-2011 Technical conditions for household split dual-circuit solar water heating systems
3GB 26969-2011 Energy efficiency limit value and energy efficiency grade of household solar water heating system
4GB/T 23889-2009 Technical conditions of household air source heat pump assisted solar water heating system
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was entrusted by the court to conduct an appraisal and analysis on "whether there are quality problems" with the solar water heater involved in the case.
appraisal analysis results:
appraisal analysis expert group discussed the relevant information and on-site investigation of the solar water heater involved and made a comprehensive quality and technical analysis, and made the following suggestions and conclusions:
1. When the solar irradiation is 17MJ/㎡, the temperature at the end of the heat collection in the hot water storage tank reaches 53℃ (standard requirement ≥45℃), this appraisal is qualified; 2. The daily solar radiation amount is 17MJ/㎡, and the daily useful heat gain is 8.0MJ/㎡ (standard requirement ≥7.7MJ/㎡), this item is qualified;
3. The average heat loss factor is 17W/(m3.K) (standard requirement ≤16W/(m3.K), this item is unqualified.
inspection conclusion: After inspection According to the inspection, the "average heat loss factor" in the thermal performance item tested by this sample does not meet the standard requirements of GB/T19141-2011 "Technical Conditions for Household Solar Hot Water Systems", and the inspected items are unqualified. According to the requirements of GB/T19141-2003 "Technical Conditions for Household Solar Hot Water Systems", the average heat loss factor of this inspection is qualified.