Abstract
This paper deals with simulating a solar assisted under floor heating system during the three coldest months (i.e., December, January, and February) for a building of 100 m2 area in Mosul city, Iraq. The simulations are conducted using TRNSYS18 software. The main components of the heating system under consideration, simulated using TRNSYS18 software, are a flat plate collector a storage tank, under-floor heating pipes. and an auxiliary heater which used when there is no enough solar potential. This work presents the indoor temperature and accessory loads by using variable collector area and volume of the storage tank. The results indicate that the heating system efficiently warms the indoor air in the building under study with an optimum collecting area of (24 m2) and optimum storage tank volume of (1.0 m3) to reduce the consumption of auxiliary energy to a very low level.
