| 摘要 |
A body, such as a building to be heated or cooled, is surrounded by a wall structure forming two hollow spaces arranged in parallel to each other. An outer hollow space is connected to the atmosphere so that outside air can flow into the outer hollow space. A separation wall between the outer hollow and an inner hollow space has leakage paths for air to pass from the outer into the inner hollow space which is kept at a reduced pressure relative to the atmosphere to enhance an inward air flow through the leakage paths. Thus, heat passing outwardly through the wall structure heats or cools the air being evacuated from the inner hollow space, depending on the temperature gradient across the wall structure. The evacuated air passes through a heat recovery system which may be connected to a heating system of the building or to a heat storage or to the atmosphere. |
