Assessment of energy efficiency in electric storage water heaters
Assessment of energy efficiency in electric storage water heaters
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DOI：
10.1016/j.enbuild.2008.06.007
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发表时间：
2008
影响因子：
6.7
通讯作者：
D. S. Sowmy;R. Prado
中科院分区：
文献类型：
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作者：
D. S. Sowmy;R. Prado
现在有几种方式供应热水的淋浴在住宅楼。其中之一是使用电储水式热水器（锅炉）。该设备利用电阻产生的热量提高蓄水池（水箱）中的水温。这种设备在巴西的行为仍然是一个研究对象，该国没有一个标准来规范其效率。在此背景下，进行了一项旨在收集功耗数据以评估其性能的实验计划。锅炉经历一个操作循环以模拟使用条件，旨在收集用于计算效率的参数。该1天循环由以下阶段组成：热水回收、再加热和备用热损失。该方法允许识别有关锅炉工作的不同参数，如：24小时内的备用热损失，热水提取率，再热时间和能源效率。获得的平均能源效率为75%。锅炉2的效率最低为62%，锅炉9的效率最高为85%。
Nowadays there are several ways of supplying hot water for showers in residential buildings. One of them is the use of electric storage water heaters (boilers). This equipment raises the water temperature in a reservoir (tank) using the heat generated by an electric resistance. The behavior of this equipment in Brazil is still a research object and there is not a standard in the country to regulate its efficiency. In this context, an experimental program was conducted aiming to collect power consumption data to evaluate its performance. The boilers underwent an operation cycle to simulate a usage condition aiming to collect parameters for calculating the efficiency. This 1-day cycle was composed of the following phases: hot water withdrawal, reheating and standby heat loss. The methods allowed the identification of different parameters concerning the boilers work, such as: standby heat loss in 24h, hot water withdrawal rate, reheating time and energy efficiency. The average energy efficiency obtained was of 75%. The lowest efficiency was of 62% for boiler 2 and the highest was of 85% for boiler 9.