{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,28]],"date-time":"2026-03-28T11:51:23Z","timestamp":1774698683125,"version":"3.50.1"},"reference-count":43,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2019,1,15]],"date-time":"2019-01-15T00:00:00Z","timestamp":1547510400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Inventions"],"abstract":"<jats:p>In this work, HVAC (Heating, Ventilation and Air Conditioning) systems applied in university buildings with control based on PMV (Predicted Mean Vote) and aPMV (adaptive Predicted Mean Vote) indexes are discussed. The building\u2019s thermal behavior with complex topology, in transient thermal conditions, for summer and winter conditions is simulated by software. The university building is divided into 124 spaces, on two levels with an area of 5931 m2, and is composed of 201 transparent surfaces and 1740 opaque surfaces. There are 86 compartments equipped with HVAC systems. The simulation considers the actual occupation and ventilation cycles, the external environmental variables, the internal HVAC system and the occupants\u2019 and building\u2019s characteristics. In this work, a new HVAC control system, designed to simultaneously obtain better occupants\u2019 thermal comfort levels according to category C of ISO 7730 with less energy consumption, is presented. This new HVAC system with aPMV index control is numerically implemented, and its performance is compared with the performance of the same HVAC system with the usual PMV index control. Both HVAC control systems turn on only when the PMV index or the aPMV index reaches values below \u22120.7, in winter conditions, and when the PMV index or the aPMV index reaches values above +0.7, in summer conditions. In accordance with the results obtained, the HVAC system guarantees negative PMV and aPMV indexes in winter conditions and positive PMV and aPMV indexes in summer conditions. The energy consumption level is higher in winter conditions than in summer conditions for compartments with shading, and it is lower in winter conditions than in summer conditions for compartments exposed to direct solar radiation. The consumption level is higher using the PMV control than with the aPMV control. Air temperature, in accordance with Portuguese standards, is higher than 20 \u00b0C in winter conditions and lower than 27 \u00b0C in summer conditions. In Mediterranean climates, the HVAC systems with aPMV control provide better occupants\u2019 thermal comfort levels and less energy consumption than the HVAC system with PMV control.<\/jats:p>","DOI":"10.3390\/inventions4010003","type":"journal-article","created":{"date-parts":[[2019,1,16]],"date-time":"2019-01-16T03:09:13Z","timestamp":1547608153000},"page":"3","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["HVAC Systems Applied in University Buildings with Control Based on PMV and aPMV Indexes"],"prefix":"10.3390","volume":"4","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5963-2107","authenticated-orcid":false,"given":"Eus\u00e9bio Z. E.","family":"Concei\u00e7\u00e3o","sequence":"first","affiliation":[{"name":"Faculdade de Ci\u00eancias e Tecnologia, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal"},{"name":"CINTAL, Campus de Gambelas, 8005-139 Faro, Portugal"}]},{"given":"Ant\u00f3nio F. M.","family":"Sousa","sequence":"additional","affiliation":[{"name":"CINTAL, Campus de Gambelas, 8005-139 Faro, Portugal"}]},{"given":"Jo\u00e3o M. M.","family":"Gomes","sequence":"additional","affiliation":[{"name":"CINTAL, Campus de Gambelas, 8005-139 Faro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6308-8666","authenticated-orcid":false,"given":"Ant\u00f3nio E.","family":"Ruano","sequence":"additional","affiliation":[{"name":"Faculdade de Ci\u00eancias e Tecnologia, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal"},{"name":"CINTAL, Campus de Gambelas, 8005-139 Faro, Portugal"},{"name":"IDMEC, Instituto Superior T\u00e9cnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2019,1,15]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"394","DOI":"10.1016\/j.enbuild.2007.03.007","article-title":"A review on buildings energy consumption information","volume":"40","author":"Ortiz","year":"2008","journal-title":"Energy Build."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"515","DOI":"10.1016\/j.apenergy.2013.05.040","article-title":"On variations of space-heating energy use in office buildings","volume":"111","author":"Lin","year":"2014","journal-title":"Appl. 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