Energyefficient buildings

A major use of energy in colder climates is to heat buildings, especially in winter. What a person considers a comfortable air temperature depends on the humidity, the received radiation flux, the wind speed, clothing and that person's activity, metabolism and life-style. Consequently, inside (room) temperature Tr may be considered comfortable in the range of about 15-22 °C. The internal built environment should be at such a 'comfort temperature', whilst using the minimum artificial heating or cooling {Pboost), even when the external (ambient) temperature Ta is well outside the comfort range. The heat balance of the inside of a building with solar input is described by equations similar to (5.1). The simplest formulation considers lumped parameters, such that rncdT = TaGA + P^ - {T—Ta) (6.4)

Detailed mathematical modelling of a building is most complex and is undertaken with specialist software packages. Nevertheless, (6.4) contains the basis of all such modelling, namely energy fluxes and heat capacities.

Note also that the energy required to make the materials and for the construction of the building is also an 'energy expenditure' that should be considered. This is called the 'embodied energy', which is determined from specialist data resources.

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Renewable Energy Eco Friendly

Renewable Energy Eco Friendly

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable.

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