Estimation of Solar Hot Water System Operation for a Residential Building

: pp. 1 – 6
Received: November 27, 2020
Revised: December 02, 2020
Accepted: December 28, 2020
Lviv Polytechnic National University
Lviv Polytechnic National University

Solar hot water supply systems can provide a significant part of the thermal energy needed in the residential sector. The use of solar hot water supply systems can reduce the consumption of traditional energy sources and, consequently, reduce greenhouse gas emissions. The aim of this article is to assess the operation of the solar heating system operation to provide the needs of the hot water supply system of a residential building with thermal energy. The efficiency of a flat solar collector operating in a single-circuit thermosyphon system of solar heating of a residential building in Lviv has been established. The solar fraction of the hot water supply system of a residential building is determined depending on the volume of hot water consumed, in particular 50, 60, 70, 80, 90, 100 l/day. It is established that the lower the need for hot water, the greater the solar fraction of the solar hot water supply system. Thus, the average annual solar fraction of the solar hot water supply system with a daily consumption of 50 l/day is 0.77, and with a daily consumption of 100 l/day the solar fraction is 0.39. The average value of the solar fraction for the solar hot water supply systems of the studied house is 0.55.

  1. Wojdyga. K., Chorzelski M. (2017) Chances for Polish district heating systems. Energy Procedia, 116, 106-118.
  2. Millar M.-A., Burnside N. M., Yu Z. (2019) District heating challenges for the UK. Energies, 12(2), 310.
  3. Mendoza R.C., Hernandez J. M. R., Gomes E. V., Alonso J. F. S. J., Martinez F. J. R. (2019) Analysis of the methodology to obtain several key indicators performance (KIP), by energy Retrofitting of the actual building to the district heating fuelled by biomass focusing on nZEB goal: case of study. Energies, 12(1), 93. 
  4. Savchenko O., Zhelykh V., Yurkevych Y., Kozak K., Bahmet S. (2018) Alternative energy source for heating system of woodworking enterprise. Energy engineering and control systems, 4 (1), 27 – 30.
  5. Nshimyumuremyi E., Junqi W. (2019) Thermal efficiency and cost analysis of solar water heater made in Rwanda. Energy exploration & exploitation, 37(3) 1147–1161.
  6. Tadvi Sachin Vinubhai, Jain Vishal R, Dr. Keyur Thakkar, A Review: Solar Water Heating Systems. National Conference on Emerging Vista of Technology in 21st Century. Parul Institute of Technologi, Limda, Vadodara, India. April 2014. 
  7. Serban A., Barbuta-Misu N., Ciucescu N., Paraschiv S., Paraschiv S. (2016) Economic and environmental analysis of investing in solar water heating systems. Sustainability, 8(12), 1286;
  8. Struckmann F. (2008) Analysis of a Flat-plate Solar Collector. MVK160 Heat and Mass Transport, 4 p.
  9. Solar Electricity Handbook. (2019)
  10. Vaillant, auroTHERM classic VFK 135/2 D (in Ukrainian)
  11. Weather in Lviv: July. (in Ukrainian)
O. Savchenko, Z. Savchenko. Estimation of solar water heating system operation for a residential building. Energy Engineering and Control Systems, 2021, Vol. 7, No. 1, pp. 1 – 6.