成果報告書詳細
管理番号20130000000714
タイトル*平成24年度中間年報 再生可能エネルギー熱利用計測技術実証事業 地中熱利用計測技術
公開日2013/10/22
報告書年度2012 - 2012
委託先名新日鉄住金エンジニアリング株式会社
プロジェクト番号P11012
部署名新エネルギー部
和文要約
英文要約Research project of calorimetric measurement technique of renewable energy
Annual report
NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD.
Summary of research project

This project aims at establishment of calorimetric measurement techniques for the ground thermal energy system. The techniques can measure or estimate the calorie of ground thermal energy utilized for heating or cooling. In order to accomplish the target of project, two kinds of the measurement techniques will be developed.
The first one is the measurement technique using temperature sensors and ultrasonic flow meter placed the pipe outside surface. Another is the calorimetric estimation technique utilizing measurement values of refrigerant temperature in the heat pump unit.
In this year, the precision of temperature sensors and ultrasonic flow meter placed the pipe outside surface was verified by using the field test apparatus. First, the flow rates measured by the ultrasonic flow meter were compared to the one measured by the electromagnetic flow meter. The result showed that the error between the flow rates measured by the ultrasonic flow meter and the electromagnetic flow meter was less than the specific measurement error of ultrasonic flow meter. This indicates that the maximum measurement error of ultrasonic flow meter is estimated as 6.7 %. Next, the temperatures measured by using the temperature sensor attached on the surface of pipe were compared to the temperatures by using the temperature sensor installed in the pipe. As the result, the differences between the temperatures measured by the temperature sensor attached on the surface of pipe and the temperature sensor installed in the pipe were less than 0.62 oC. Consequently, the error of amount of heat estimated with the measurement technique using temperature sensors and ultrasonic flow meter placed the pipe outside surface is less than 20 %.
Additionally, the amounts of heat estimated by the calorimetric estimation technique utilizing measurement values of refrigerant temperature in the heat pump unit were compared to the amount of heat estimated by the measurement technique using the temperature sensors and electromagnetic flow meter installed in the pipe. The relative errors between the amounts of heat were 2.0 ~ 12.3 %.
Basis on the field test result, the measuring and computing instruments were created and installed equipped in the GSHP system installed in the building in Kitakyushu city.
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