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The reason your utility company recommends to let the sunshine in is not to save on lighting energy. it is to take advantage of solar radition energy. a window can let the solar radiation in two ways, direct radiation and scatter radiation. The calculation of radiation energy has to do with many factors such as the geographical altitude and azimuth of the ...


3

I expect the same material as the coils would be the easiest answer ; nichrome ,Inconel ( 600, 601 or other number) , chromel. There are small differences but any one you can find would be good. That would also be practical as it would be readily available to the manufacturer. Stainless like 304 will probably work but I am uncertain of the many cycles into ...


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In order to assess the efficiency you need to compare the heat transfer rate $\dot{Q}$ with and without blinds. There are a few studies comparing the effect of blinds (internal/external/enclosed) on heat transfer. One of them in 2014 Effect of the roller blinds on heat losses through a double-glazing window during heating season in Central Europe, found ...


1

Home improvement centers have R10 insulating foam boards the come in 2' x 4' (feet) and some are self adhesive. . . If you have certain species of birds you need to cover them with plastic sheets tho. The other alternative is to cover the roof windows with a suspended roof of plywood raised 8 inches from the skylights to allow breeze from the sides wash the ...


1

. Sun controlling devices Effective use of plants. Deciduous trees can be used very effectively as sun controlling devices. Also trellis with seasonal plants on the wall with the greatest sun exposure can be used to great effect. The idea here is to use a plant, to stop the sun's radiation from hitting the house and warming it in the summer, and allowing it ...


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The BTU British Thermal Unit is the confusing imperial unit of measuring energy. Heat transfer is in units of power or BTU/hr even though lots of professional heat transfer sources get lazy and just say "BTUs". It is an important distinction though when designing a system. 1 BTU/hr = 0.29 Watts of power. The heat loss in your building will be a ...


1

There are many factors, but intuitively the gap should be adequate to allow a decent thermal gradient for the air. Air can establish steady convection, rising on the room side pane and descending along the colder outside pane in a much narrower plume than that of a two-inch gap, even with the damping effect of slow movement on the two sides of the pane. That ...


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Those fibers are also commonly used to color-code the wires so you will not confuse them when you strip off the insulation, and wire up your device backwards.


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The fibre is usually the first part of the cable making process, as it forms the support for adding further components as the thin signal cables need the fibre support.


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Greenhouses generally work by trapping radiation (infrared to be more specific). More specifically what they do is allow most of the sun radiation to come through and then trap the infrared radiation which is re-emitted from the objects within the greenhouse. types of heat transfer For the greenhouse equilibrium you need to consider all 3 types of heat ...


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