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首届京津地区太阳能热水器测评会于1990年5月20日至6月8日在北京中国农村能源研究培训中心举行。参评单位有京津地区的16个太阳能热水器生产厂家。中国农村能源研究培训中心承担这次评比的测试工作。这次送评的热水器共31台,类型有:自然循环式、混合式、闷晒式等;取材有:铜管铜板、铜管铝板、板芯和镀锌管、镀锌板;工艺主要采用铜铝复合焊接;面积有一平方米和两平方米两种。通过测评表明,目前国内生产的热水器质量有所提高(参评的31台热水器,热效率高于50%的占80%;低于国家标准45%的仅一台),在外观和工艺上都有较大改进,但也存在不少问题,如热水器
The first Beijing-Tianjin area solar water heater assessment and assessment meeting was held in Beijing China Rural Energy Research and Training Center from May 20 to June 8, 1990. The participating companies have 16 solar water heater manufacturers in Beijing and Tianjin. The China Rural Energy Research and Training Center undertakes the testing of this competition. The total number of water heaters sent to the review was 31, including: natural circulation type, hybrid type, and boring type. The materials are: brass copper plates, copper tubes, aluminum plates, plate cores, galvanized tubes, and galvanized plates; Copper-aluminum composite welding; area has one square meter and two square meters. According to the assessment, the quality of domestic water heaters has been improved (31 water heaters, 80% with a thermal efficiency higher than 50%, and only one with a 45% lower national standard). Great improvement, but there are also many problems, such as water heaters