: 137-142
Received: February 28, 2021
Revised: April 20, 2021
Accepted: May 13, 2021
Lviv Polytechnic National University
Lviv Polytechnic National University
Department of Heat and Gas Supply, and Ventilation, Lviv Polytechnic National University
Lviv Polytechnic National University, Department of Building Production
Department of Heat and Gas Supply, and Ventilation, Lviv Polytechnic National University

Today, the energy sector of Ukraine requires significant consumption of traditional energy sources (oil, gas, coal, nuclear energy). However, their use is associated with a number of difficulties, including thermal, chemical, and radioactive contamination of the environment and the exhaustion of their reserves. The paper is devoted to solving the actual problem of improving the efficiency of solar heat supply systems with solar collectors. An analysis of the potential of solar energy and existing solar heat supply systems is presented. The advantages and disadvantages of various solar collector designs and methods of their research are analyzed. The analysis of the main directions for improving the efficiency of solar collectors and solar heat supply systems, in general, is presented. An improved solar heat supply system with the proposed design of a solar collector is obtained and its temperature characteristics are established depending on the intensity of solar energy intake.

Shapoval, S., Zhelykh, V., Spodyniuk, N., Dzeryn, O., Gulai, B. (2019). The effectiveness to use the distribution manifold in the construction of the solar wall for the conditions of circulation. Pollack Periodica, 14(2), 143-154.  (in English)
Solovei, O. I., Legа, Yu. G., Rosen, V. P., Sitnik, O. O., Chernyavsky, A. V., Kurbak, G. V. (2007). Nontraditional and Renewable Energy Sources: Teaching. Manual. Cherkasy: ChTTU. (in Ukrainian)
Dudyuk, D. L., Mazepa, S. S. (2004). Unconventional (renewable) energy sources. Lviv: RVV Ukr DLTU. (in Ukrainian)
Babych, M., Krygul, R., Shapoval, S., Tolstushko, N., Korobka, S., Tolstushko, M. (2019). Results of experimental researches into process of oak veneer drying in the solar dryer. Eastern-European Journal of Enterprise Technologies, 2 (8-98), 13-22. doi:10.15587/1729-4061.2019.162948 (in English)
Kudrya, S. O., Golovko, V. M. (2005). Basics of designing power plants with renewable sources. Nizhyn: Aspect-Polygraph Publishing House. (in Ukrainian)
Zhelykh, V., Pona, O., Eltman, A., Shapoval,  S. (2015) Perspectives of using heliosystems and their research in solar heating system,  XV International Scientific Conference: Сurrent issues of civil and environmental engineering and architecture, September 2015. Rzeszów - Lviv - Kosice. (in English)
Malkin, Ye. S. (Ed.). (2002). Method of presenting data on solar radiation for calculating the solar heating system. Ventilation, lighting and heat and gas supply. К.: КNUBA. (in Ukrainian)
Havrus, V., Shelevytsky, I. (2008). Forgot the right to the sun or warmth in your home. Electronic journal of the energy service company "Ecological Systems", 2. (in English)
Zakhidov, R. A., Vainer, A. A., Umarov, G. Ya. (1977). Theory and Calculation of Heliotechnical Concentrating Systems. Tashkent: Fan. (in Russian)
Malevsky Yu. N. (Ed.). (1977). Thermal processes based on solar energy utilization. M: Mir. (in Russian)
Akimenko, O., Kostiuchenko, I. (2020). Prospects of the introduction of alternative energy sources as a step to the internation cooperation. Problems and Prospects of Economics and Management, 4 (24), 43-50. (in Ukrainian)
Moiseenko, V. V. (1992). System development of a solar collector for decentralized heat supply. (PhD dissertation). Odessa National Polytechnic University, Odessa. (in Ukrainian)
Doroshenko, A. V., Khalak, V. F. (2018). Solar polymer liquid collectors. Analysis of existing results, new solutions. Refrigeration Engineering and Technology, 54 (5), 44-52. (in Ukrainian)
Pukhovyj, I. I., Bezrodny, M. K., Kudrya, T. S. (2007). Study of the passive solar heating system of the "glazed loggia" type in the absence of traditional heating. Renewable energy of the XXI century: materials of the VIII International conference, September 17-21, 2007. Crimea, 105-106. (in Ukrainian)
Cristofari, C., Notton, G., Poggi, P., Louche, A. (2002). Modelling and performance of a copolymer solar water heating collector. Solar Energy, 72, 2, 99-112.  Режим доступу до журн. : (in English)
Raman, R., Mantell, S., Davidson, J., Wu, C., Jorgensen, G. (2000). A review of polymer materials for solar water heating systems. Journal of Solar Energy Engineering, 122, 2, 92-100. Doi: (in English)
Fahrenbruch, A., Byub, R. (1987). Solar elements: theory and experiment. M .: Energo-atomizdat. (in Russian)
Fortuin, S., Hermann, M., Stryi-Hipp, G., Nitz, P., Platzer, W. (2014). Hybrid PV-thermal collector development: concepts, experiences, results and research needs. Energy Procedia, 48, 37-47. doi: (in English)
Chen, G., Doroshenko, A., Koltun, P., Shestopalov, K. (2015). Comparative field experimental investigations of different flat plate solar collectors. Solar Energy, 115, 577-588. (in English)
Misak, Y. S., Voznyak, O. T., Datsko, O. S., Shapoval, S. P. (2014). Solar energy: theory and practice: monograph. Lviv: Lviv Polytechnic Publishing House. (in Ukrainian)
Odintsov, A. N. (2009). Feasibility of using vertical solar collectors for thermal regulation of premises. Bulletin of SevDTU, 97, 204-209. (in Russian)
Gladen, A. C., Davidson, J. H., Mantell, S. C. (2014). The effect of a thermotropic material on the optical efficiency and stagnation temperature of a polymer flat plate solar collector. J. Sol. Energy Eng, 137 (2), 021003-021003. (in English)
Chorna, N. O. (2011). Method of calculation of optical-geometric parameters of "zonal" focclines. Lighting and Electronics, 2, 43-49. (in Ukrainian)
Shapoval, S. P. (2010). The efficiency of the "delta system" of flat solar collectors at different angles of their installation. Bulletin of the National University "Lviv Polytechnic" Theory and Practice of Construction, 664, 331-335. (in Ukrainian)
Gershkovych, V. F. (2009). Heat pump in a multi-storey residential building. Is it for the future or today? Installation Market, 1, 32-33. (in Ukrainian)
Novakivskyj, E. V. (2004). Improving the efficiency of solar energy use in combined industrial heating systems. (PhD dissertation). Odessa National Polytechnic University, Odessa. (in Ukrainian)
Novakovsky, E. V., Denisova, A. E., Mazurenko, A. S. (2003). Analysis of the efficiency of delta-system solar collectors for alternative heating systems. Ecotechnology and resource conservation: scientific and technical journal, 6, 14-17. (in Ukrainian)