The Advisability of Employment of Renewable Energy Sources in DHW Systems in the Kindergarten

Dorota Krawczyk , Antonio Rodero , Agata Witkowska , Bernadetta Wądołowska


This research aims to show the advisability of usage of selected renewable energy sources for domestic hot water (DHW) installations in buildings located in Poland and Spain. The analysis was conducted for a typical kindergarten, an example of buildings with high density of people and stable profile of usage, as opposed to schools which are closed during summer holidays. We took into account national regulations to estimate heat demand. Then applying solar collectors and heat pumps to use as a monovalent energy sources were considered. The total cost of the system with solar collectors in Poland was found to be 1.4 times higher than in Spain, whereas the difference in a case of air heat pumps was 18%. Moreover efficiency of solar collector and heat pump systems were found as 49.56% for Warsaw, 52.29% for Madrid with coefficient of performance (COP) 2.2 and 2.55 respectively, therefore simple payback time (SPBT) of investment was estimated in a range between 6–12 years for solar collectors and 5–6 years for heat pumps.
Author Dorota Krawczyk (FCEE / HVAC)
Dorota Krawczyk,,
- Heating, Ventilation, Air Conditioning Department (HVAC Department)
, Antonio Rodero
Antonio Rodero,,
, Agata Witkowska
Agata Witkowska,,
, Bernadetta Wądołowska
Bernadetta Wądołowska,,
Journal seriesProceedings, ISSN , e-ISSN 2504-3900, (0 pkt)
Issue year2019
Publication size in sheets0.3
ConferenceInnovations-Sustainability-Modernity-Openness Conference (ISMO'19), 22-05-2019 - 23-05-2019, Białystok, Polska
Keywords in Englishheat pumps; solar collectors; renewable energy; DHW
Internal identifierROC 19-20
Languageen angielski
LicenseJournal (articles only); published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)5
Score sourcejournalList
ScoreMinisterial score = 5.0, 12-02-2020, ArticleFromJournal
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