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

生活热水供应系统的长期测量和年度模拟

• 批准号: 13650660
• 负责人: IWAMOTO Shizuo
• 金额: $ 2.18万
• 依托单位: Kanagawa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650660/
• 关键词: domestic hot water supply; measurement in Residence; used hot water volume; hot water temperature in use; gas instant water heater; gas consumption; numerical simulation; ガス給湯機

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.

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：分析自？通过建立判别浴缸热水压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。 2002年10月至2003年9月一年内，整个热水供应消耗能量的20％左右用于再热和自动保温，与以往的研究结果总体相当。根据测量结果，分析浴缸、淋浴龙头、厨房和盥洗室各用途的热水温度。可见季节性差异显着，有必要继续进一步分析。在对再热和自动保温消耗能量预测方法的检验中，发现它很大程度上依赖于热水供应系统的热源效率，并且需要与热水供应时间相同的计算模型。(2)热水供应机的建模和验证：采用最详细的燃气即时热水供应机计算模型对调查的住宅单元系统进行建模。虽然需要进行一些调整，但能够将一个热水供应周期的误差控制在1%左右。 (3)年度模拟：利用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。燃气即供机热水供应系统总效率约为75%。