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Effect of Colored Absorbers on the Performance of a Built-In-Storage Type Solar Water Heater

机译：彩色吸收剂对储存型太阳能热水器性能的影响

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Four built-in-storage solar water heaters (BSWH) of equal volume, equal projected area are tested simultaneously under identical working conditions for their performance comparison in terms of efficiency and heat energy absorb ability. Three of the heaters of BSWH are painted with three different colors (black, blue and red brown) and one is left colorless. The BSWH with different colors are used to heat 138 liters of water. Maximum temperature of water is achieved while the heater is painted black. In the month of March, temperature of water is achieved 54°C for black absorber absorbing 542 W/m~2, 500C for blue absorber absorbing 448 W/m~2, 43°C for red brown absorber absorbing 341 W/m~2 and 41°C for colorless absorber absorbing 336 W/m~2. Monthly average efficiency of BSWH with black absorber is 57% in February and 56.5% in March, with blue absorber is 53% in February and 50% in March, with red brown absorber is 41% in February and 40% in March and with colorless absorber is 35% in February and 35% in March respectively.
机译：在相同的工作条件下，在效率和热能吸收能力方面的相同工作条件下同时测试四个内置储存的太阳能热水器（BSWH）等体积相等的投影区域。 BSWH的三个加热器用三种不同的颜色（黑色，蓝色和红色棕色）涂上，一个是无色的。用不同颜色的BSWH用于加热138升水。在加热器涂成黑色时，实现了最高温度。在3月份，为黑色吸收器吸收54°C的温度为54°C，为蓝色吸收器吸收448W / m〜2，43°C为红色棕色吸收器吸收341W / m〜用于无色吸收器的2和41°C吸收336W / m〜2。 2月份BSWH的月平均效率为3月份的57％，3月份56.5％，2月份为53％，3月份50％，红褐色吸收剂是2月份的41％，3月份40％，无色吸收剂分别在2月份35％和35％。

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