- Title : Plant Engineers & Managers Guide 07 by Albert Thumann, P.E., C.E.M.
- Publish : Marcel Dekker, Inc New York and Basel
- Type Document : pdf
- Release : December 2002
- Total Page : 21 page
- Size : 0.59 Mb
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Decrypted Contents
Reducing Building Energy Losses
ENERGY LOSSES DUE TO HEAT LOSS AND HEAT GAIN
Depending on the time of year, a heat loss or a heat gain wastes energy. For example, a heat loss during the winter means wasted energy in heating the building. Similarly, during the summer months, a heat gain means wasted energy in cooling the building. The building construction affects the heat loss and heat gain. Figure 7-1 illustrates the total heat gain of the building. The flow of heat is always from one temperature to a colder temperature. The heat loss of a building is illustrated by Figure 7-2. In this case, the building is considered the “hot body.”
In the context of this book, heat loss refers to heating loads, while heat gain refers to cooling loads. By considering building materials and constructions, the associated heat loss and heat gains can be reduced. In this chapter, you will see: how to apply handy Building Construction Tables to solve most heat transfer problems, how substitutions of building materials saves energy, and how to apply different types of glass to save energy.
CONDUCTIVITY THROUGH BUILDING MATERIALS
The best conductors of heat are metals. Insulations such as wood, asbestos, cork, and felt are poor conductors. Conductance is widely used because many materials used in the construction of buildings are nonhomogeneous.
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