{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,24]],"date-time":"2026-04-24T18:50:08Z","timestamp":1777056608594,"version":"3.51.4"},"reference-count":31,"publisher":"MDPI AG","issue":"22","license":[{"start":{"date-parts":[[2021,11,16]],"date-time":"2021-11-16T00:00:00Z","timestamp":1637020800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"State Grid Jiangsu Electric Power Co., Ltd. Marketing Service Center","award":["S(GJSYF00LJJS2000148)"],"award-info":[{"award-number":["S(GJSYF00LJJS2000148)"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>How to perform accurate calculation of heat balance and quantitative analysis of energy efficiency for building clusters is an urgent problem to be solved to reduce building energy consumption and improve energy utilization efficiency. This article proposes a method for the heat balance calculation and energy efficiency analysis of building clusters based on enthalpy and humidity diagrams and applies it to the energy management of building clusters containing primary return air systems and heating pipe networks. Firstly, the basic structure and energy management principle of building clusters with a primary return air system and a heating pipe network were given, and the heat balance calculation and energy efficiency analysis method based on i-d diagram was proposed to realize the accurate calculation of heat load and the quantification of energy utilization. Secondly, the energy management model of the building cluster with a primary return air system and a heating pipe network was established to efficiently manage the indoor temperature and the heating schedule of ASHP, HN and HI. Finally, the proposed method was validated by calculation examples, and the results showed that the proposed method is beneficial for improving the energy economy and energy efficiency of building clusters.<\/jats:p>","DOI":"10.3390\/s21227606","type":"journal-article","created":{"date-parts":[[2021,11,17]],"date-time":"2021-11-17T09:16:11Z","timestamp":1637140571000},"page":"7606","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Heat Balance Calculation and Energy Efficiency Analysis for Building Clusters Based on Psychrometric Chart"],"prefix":"10.3390","volume":"21","author":[{"given":"Shihai","family":"Yang","sequence":"first","affiliation":[{"name":"State Grid Jiangsu Electric Power Co., Ltd. Marketing Service Center, Nanjing 210019, China"},{"name":"College of Energy and Electrical Engineering, Hohai University, Nanjing 210098, China"},{"name":"State Grid Electric Power Demand Side Coordinated Control Technology Joint Laboratory, Nanjing 210019, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Huiling","family":"Su","sequence":"additional","affiliation":[{"name":"State Grid Jiangsu Electric Power Co., Ltd. Marketing Service Center, Nanjing 210019, China"},{"name":"State Grid Electric Power Demand Side Coordinated Control Technology Joint Laboratory, Nanjing 210019, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xun","family":"Dou","sequence":"additional","affiliation":[{"name":"College of Electrical Engineering and Control Science, Nanjing TECH University, Nanjing 211816, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mingming","family":"Chen","sequence":"additional","affiliation":[{"name":"State Grid Jiangsu Electric Power Co., Ltd. Marketing Service Center, Nanjing 210019, China"},{"name":"State Grid Electric Power Demand Side Coordinated Control Technology Joint Laboratory, Nanjing 210019, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yixuan","family":"Huang","sequence":"additional","affiliation":[{"name":"State Grid Jiangsu Electric Power Co., Ltd. Marketing Service Center, Nanjing 210019, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,11,16]]},"reference":[{"key":"ref_1","unstructured":"(2021, October 10). The International Energy Agency: The World Energy Brief Statistics in 2012. Available online: http:\/\/www.trqgy.cn\/report\/201303\/23344.html."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"337","DOI":"10.1016\/j.apenergy.2012.10.047","article-title":"A case study on energy consumption and overheating for a UK industrial building with roof lights","volume":"104","author":"Wang","year":"2013","journal-title":"Appl. Energy"},{"key":"ref_3","unstructured":"US DOE (2021, October 10). 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