Optimizing the Energy Function of Solid Walls without Windows in Sun Front Direction

In this paper, the purpose is finding a way to convert a solid wall without window to the passive thermal energy source. So the discussion is about the optimization of parts of buildings, especially solid walls without windows that are in front of sunshine and their neighborhoods to get more energies. With construction technologies, any part of buildings like walls, floors, roofs and etc. can be used as a passive energy sources, so heating and cooling equipment in building can be used less. One of the most important sun energy collectors are windows in southwest, south and southeast directions passively. If a building does not have a window in sunshine directions, some parts of heating energies are missed. It is important in winter that sun radiations are big source of energy for heating the places. Purpose is enhancement of heating quality in fronts, that don’t have windows. This passive system can adopt in all climates with cold winter or where that people use heating equipment at some times. First, paper explains about direct and indirect gains and trombe walls, and then finds the concept of heating passive systems. Obviously, the all of passive systems have some deficiencies, for example direct gains limit the use of any kind of carpets inside the place and some times, more heating radiations make place hotter than comfort zone. Trombe walls sit in south directions (rotated 15 degrees to the east or west) where windows should be there and reduce saving the sun radiation. So in design of passive systems, this is important to find advantages and use of them in the best way that it is possible. Thermal energy of water trombe walls waste after the water temperature achieves to 74°C and other hand, control of temperature of pipes to gain the pleasant heating is hard too. Management of surplus thermal energy of water trombe wall and flow it in copper pipes, insert the thermal energy to the stone wall. Combining of water trombe wall and thermal mass of stone wall were created an expansible trombe wall through extending the heat in stone wall with hot water pipes. Thermal mass of stone wall can radiate the thermal energy to the inside of place during the night. A model with appropriate scale is the best way to simulate the operation of passive system that is designed, so it shows that this passive system works or not. Model of system built from five copper pipes that put in a wire box, and then filled with sands and pebbles. The hot water with 74°C temperature is poured in the copper pipes and was kept in them for 2 hours. As a result, combining the heating of trombe wall and stone wall help to save surplus heating energy of trombe wall in stone wall for night and improve the thermal efficiency and remove the deficiencies of trombe wall and minimize the waste of thermal energy and enhance stone walls from a buffer to suitable sources of thermal energy.