Scholarly record
ENERGY BALANCE OF A ROOM-INTEGRATED TROMBE WALL
Abstract
This paper presents an energy balance study of a non ventilated, room integrated Trombe wall type system in a residential room in Varna, Bulgaria. The system uses a matte coated aluminium absorber plate, 2.0 m by 1.0 m by 0.01 m, placed about 30 cm behind exterior glazing. It works without fans, ducts, or a separate air supply path. Heat is transferred to the room by solar absorption, long wave radiation, natural convection caused by buoyancy, and conduction through the aluminium plate. The study uses measured data from the heating season to estimate the useful heat delivered by the absorber and to build a simple energy balance model that follows the measured thermal response. The analysis gives a seasonal useful heat gain of about 64.5 kWh, or about 32.3 kWh per square metre of absorber area. The results show that a thin aluminium absorber can still give useful passive solar heat gains in real weather, even though it has much lower thermal mass than a classical masonry Trombe wall. The paper focuses only on energy balance, useful heat gain, heat transfer processes, and seasonal room level effects, so that its scope remains clearly separate from dynamic time lag analysis metrics for retrofits.
Publication details
References6
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