Developing a strategy to reduce energy consumption and CO2 emissions from underfloor heating systems in mosques: A case study of a typical neighbourhood mosque

Yüksel A., Arıcı M., Krajcik M., Civan M., Karabay H.

ENERGY AND BUILDINGS, vol.287, no.112984, pp.1-16, 2023 (SCI-Expanded)

  • Publication Type: Article / Article
  • Volume: 287 Issue: 112984
  • Publication Date: 2023
  • Doi Number: 10.1016/j.enbuild.2023.112984
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Environment Index, INSPEC, Pollution Abstracts, Public Affairs Index, Civil Engineering Abstracts
  • Page Numbers: pp.1-16
  • Kocaeli University Affiliated: Yes


This study aimed to reduce fuel consumption and CO2 emissions in a typical neighborhood mosque in

Yalova, Turkey, where winters are mild and rainy and the average monthly outdoor temperature can typically

drop to 4 C, by improving the operating strategy of its underfloor heating system (UHS) while

maintaining thermal comfort. The mosque has a thick outer wall and a large indoor volume and therefore

high thermal inertia. Dynamic computer simulations were performed for each operating strategy

employing input data from measurement. Six operation strategies were devised with respect to prayer

times. When UHS was operated only during prayer times, energy consumption and CO2 emissions

decreased, but thermal comfort was not achieved. When the UHS was operated only at night, comfortable

conditions during prayer times were not achieved either. In the scenarios where UHS was used only during

the day but not between morning and noon prayers, CO2 emissions increased. In the last scenario, the

UHS was turned off between morning-noon and night-morning prayers, considering individual average

hot water loop temperatures for each month. In this scenario, an annual saving of 89 kWh (0.81 kWh/

m2day) of natural gas and 136 kg/day of CO2 emissions was attained while providing comfortable conditions.

This means a 9% reduction in fuel consumption and CO2 emissions by employing an appropriate

heating operation strategy in a typical medium-sized neighborhood mosque