This paper discusses summer cooling of buildings by means of natural ventilation. Computational fluid dynamics is used to predict the ventilation rate in a room with a Trombe wall. The effect of Trombe wall insulation on the room thermal environment is investigated. It is shown that to maximise the effect of ventilation cooling, the interior surface of a Trombe wall should be installed.
Natural passive stack ventilation (PSV) consumes no power and so produces no harmfulemissions, has no running cost, no noise of operation, requires little maintenance and becauseit involves no moving parts, operation is reliable. However, virtually all PSV systems aredesigned and constructed without incorporating heat recovery, leading to wasteful heat loss.The goal of the research reported here, is to develop a passive stack ventilation system withheat recovery for use in naturally ventilated buildings.The heat recovery unit is based on the heat-pipe principle.
Solar control devices placed in front of large building openings disturb air flow and theradiation transfer. Although solar radiation transfer through obstructed openings is arelatively well researched area, very little information is available regarding the air flowperturbations and daylighting alterations created by external solar control devices. Thepresent paper reports a series of experiments aiming at investigating natural ventilationand daylight phenomena associated with the use of specific shading devices.
Pilot houses with solar air heating systems were and are being erected in Hungary by the ''THERMO Ltd." Company. This project had two goals: to adapt the OM concept as a whole, including the thermal properties of the building itself, and to check the performance of the elements of the OM system applied on houses, built according to the local standards and practice. The experiences of a building, built according to the local standards and practice are briefly presented in the paper.
The OM solar system is one of various passive systems. As is in the general passive system, the technique in the OM solar system works with the designing and architectural space as a unity. In other words, the technique is a part of the designing. Nowadays a lot of new technique have been developed and all kinds of related technology are born. During the past nine years, the system has been already employed in about eight thousand homes and sixty public buildings all over Japan.
Expenditure on refurbishment of non-domestic buildings is expected to increase at a faster rate than that on new building. It is, therefore, important that the applicability and potential of daylighting, complete/partial natural ventilation and other passive solar techniques are assessed for use in refurbishment projects. This study assessed the technical and economic feasibility, and market acceptability of incorporating passive solar measures into non-domestic buildings at the time of refurbishment.
Optimization of solar energy use for low-energy residential houses in Japan is proposed in order to design rational solar energy systems, it is important to recognize the structure of energy consumption of the residential houses as well as the climatic conditions of the region. Using statistical data obtained from an energy survey of residences in Japan, it has been found that the three major portions of purchased energy are space heating, domestic hot water heating, and household appliances (including lighting and cooking).
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