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Opis wyświetlający się po najechaniu myszą
Supporting the Heating System with Solar Collectors in Winter (str. 2 nr. 2/52/21)
inż. Adrian Gwóźdź
dr hab. inż. prof. PŚ Tadeusz Orzechowski
  

DOI:10.15199/9.2021.2.1

 

Keywords: solar system, PCM tank, heat pump, winter operation, efficiency

Abstract

Energy demand in residential buildings accounts for a significant proportion of final energy consumption. It is estimated that in Poland it reaches 40%. A good way to reduce this share is to use more solar energy. Seasonal differences between the demand, whose peak values occur in winter, and its availability in summer, make typical solar projects suitable only for heating domestic hot water. for a period of good irradiation. The remaining heat demand is usually covered by another source, often by fossil fuel. One of the possible solutions for improvement is the development of possibly efficient systems for cooperation with heat storage. The effect of such action is an increase in efficiency and reliability, which directly translates into operating costs and lower environmental pollution, mainly carbon dioxide emissions. This paper describes the algorithm of loading a container filled with a phase change material by a system of solar collectors. When the storage is discharged, glycol is directed to the heat pump's evaporator. A higher temperature at the pump inlet causes an increase in its heating efficiency and power factor. Sample calculations were made for two winter days: February 17 and March 14. The obtained results indicate the validity of the construction of such systems. This allows more efficient use of solar energy in periods of its low availability in winter.

 

 
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