太阳能集热系统储热水箱分层特性的实验分析

摘要

Water storage tank is an important component in solar hot water heating system. The stratification characteristic of water storage tank has a direct influence on the efficiency of solar hot water heating system and hot water discharge amount. A new water storage tank is put forward in this paper; the temperature distribution during discharge process is got, and the temperature in different position in the tank, stratification number, the thickness of thermocline and mix number are analyzed under the conditions of two different flow rates of 1.60 L/min and 4.87 L/min. The use of new stratifier leads to a good stratification effect in two flow rates and the stratification effect in the flow rate of 1.60 L/min is better than that in the flow rate of 4.87 L/min.%储热水箱是太阳能集热系统中的重要部件，储热水箱的分层特性直接影响太阳能集热系统的效率和热水出水量。本文研究了一种新型的储热水箱，在1.60 L/min和4.87 L/min两种流量下，得到了储热水箱出水过程温度分布和水箱各温度测点温度、分层数、斜温层厚度、混合数的变化趋势。新型的分层器在两种流量下均具有较好的分层效果，1.60 L/min流量下的分层效果相较于4.87 L/min流量下分层效果更好。