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)长期测量结果的安排：从？建立了区分浴缸热水张力的计算方法，以及浴缸水的再加热和自动保温的测量结果。在2002年10月至2003年9月的一年中，整个热水供应消耗能量的20%左右用于再加热和自动保温，与以往的研究结果大致相当。根据测量结果，分析了浴缸、淋浴龙头、厨房和卫生间每次使用的热水温度。季节性差异显著，有必要进一步分析。通过对再热自动保温能耗预测方法的考察，发现再热自动保温能耗预测对供热系统热源效率的依赖程度较大，且需要采用与供热时间相同的计算模型。(2)热水供应机的建模与验证：采用燃气即热水供应机最详细的计算模型对调查住宅单元系统进行建模。虽然需要进行一些调整，但它能够在一个热水供应周期内将误差控制在1%以下。(3)年度模拟：利用某管道系统计算模型和2002年10月至2003年9月的测量数据，以及某热水供应机计算模型，在相同条件下进行年度模拟。燃气即供机的热水供应系统总效率约为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.