Study the long-term thermal performance of a simple absorber-storage (trombe)‎ wall solar heating system

Abstract EN

With the development of building construction engineering and the way to obtain energy from natural sources, the sun has become an important source to avail from thermal energy.

This research presents a study of the long-term thermal performance of the absorber - storage wall system using the general design method, so called Utilisability, f-chat method.

The thermal performance mathematical model equations of the system have been solved using MATLAB program in order to calculate the solar fraction factor (f) of the system during four months of the winter season (November to February).

The climatic conditions used in this part are the daily climatic conditions in Kut city.

They are calculated on the basis of the monthly average.

A number of variables affecting the wall performance have been taken into account such as solar collecting area (wall area) and wall thickness.

The results of this part showed that increasing wall area and decreasing wall thickness leads to an increase in the value of the solar fraction factor.

The maximum values of solar fraction factor were found during the month of November in the rate of 94.16%, at an area of 60 m² and a thickness of 10 cm, and concrete is considered the best performing material among other materials such as bricks and stones.

The average value of the solar fraction factor of the passive heating system included in this study was about 0.7.

This means that the solar energy according to the climatic conditions used can cover about 70% of the space heating load.