Design with Energy: The Conservation and Use of Energy in by John Littler

By John Littler

Originating from their paintings at Cambridge collage at the layout of power effective houses in Northern Europe, the authors think of the location buildings, construction designs, to be had renewable strength resources, and servicing structures in numerous forms of low power homes.

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One possibility that was considered by the Cambridge Autarkic Housing Project, as well as other groups, was to site the wind turbine on the roof of the house. This has a number of disadvantages: Goldingl29! cites the possibility of the usually turbulent wind flow over the roof producing enough thrust on the turbine to damage the roof in high winds, but there may also be adverse reactions from the occupants due to noise and vibration. The Autarkic Housing Project viewed the mounting of a turbine on the roof as a research project and hoped that by using the house structure to support the turbine, the cost of the tower could be avoided; the savings were expected to outweigh the added costs incurred in strengthening the house structure to support the turbine.

NE SE 1975 AUG SEP NW WPA gain must be remembered when evaluating the fuel savings. ) To aid the siting of windbreaks for any particular application, wind diagrams are used. Fig. l9^ Monthly wind roses (see Fig. 16), if available, are ideal because they allow design for a specific heating season. Wind roses for a number of locations may be found in the Chartered Institution of Building Services (CIBS) Guide. Wind speed and direction can only be obtained accurately by measurement but often, on first examining a site, a very rough quantitative idea of wind conditions is adequate and useful.

1. Analysis of free-heat gai Source Degree of availability (1) Occupancy a. People b. Appliances Good Fair c. Lights d. Cooking Good Poor e. Drawing curtains Good (2) Domestic hot water a. Storage vessel b. Pipe losses c. g. 2. 91 The most recent CIBS Guidel 10! provides a more rigorous interpretation of heavyweight and lightweight in terms of the response factor given by /r 2(AY) + (NV/3) Z (AU) + (NV/3) where A = area of a structural element (m 2 ); Y = admittance of a structural element (see Appendix 2) (W/(m2 K)); TV = number of room air changes per hour; V — room volume (m 3 ); U= thermal transmittance of a structural element (W/(m2 K)).

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