A Long Term Measurement and Annual Simulation on Domestic Hot Water Supply System

本研究的目的是对热水供应能耗进行长期测量和年度数值模拟。(1)长期测量结果的整理：从？通过建立判断浴缸热水张力的计算方法，以及浴缸水的再加热和自动保暖的计算方法，对测量结果进行了分析。在2002年10月至2003年9月的一年中，约有20%的热水供应能耗被用于再热和自动保暖，与以往的研究结果大体相当。根据测量结果，分析了浴缸、淋浴龙头、厨房和卫生间每种情况下的热水温度。季节差异显着，有必要继续分析。在对再热自动保温能耗预测方法的研究中，发现热水供应系统的热源效率对系统能耗的影响很大，需要与热水供应时间相同的计算模型。(2)热水机的建模与验证：采用燃气快速热水机最详细的计算模型对测量居住单元的系统进行建模。年度模拟：利用管道系统的计算模型、2002年10月至2003年9月的测量数据和热水机计算模型，在相同的条件下进行年度模拟。燃气即时供气机热水供应系统的总效率约为75%。

The aim of this research is a long term measurement and annual numerical simulation on energy consumption for hot water supply.(1)Arrangement of a long-term measurement result : it analyzed from? survey result by establishing the calculating method for distinguishing the hot water tension of a bathtub, and reheat and automatic keeping warm of bathtub water. In one year from October,2002 to September,2003,about 20% of the whole hot-water supply consumption energy was used for reheat and automatic keeping warm, and it was comparable as the past research result in general. From the measurement result, hot-water temperature of each use of a bathtub, a shower faucet, a kitchen, and a washroom was analyzed. A remarkable seasonal difference is seen and it is necessary to continue analysis further. In examination of the method of predicting the consumption energy by reheat and automatic keeping warm, it turned out that it is greatly dependent on the heat source efficiency of a hot-water supply system, and it turned out that the same calculation modeling as the time of hot-water supply is required.(2)Modeling and verification of a hot-water supply machine : the system of the dwelling unit for survey was modeled using the most detailed calculation model for the gas instant hot-water supply machine. Although some tuning was required, it was able to hold down to less than about 1% of error by one hot-water supply period.(3)Annual simulation : using the calculation model of a piping system and the measurement data from October, 2002 to September, 2003, and a hot-water supply machine calculation model, the annual simulation was carried out on the same condition. Total efficiency of the hot water supply system was about 75% in gas instant supply machine.