Tag: Thermodynamics

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What are passive solar heating systems?

The three major types of passive solar heating systems are: direct gain, trombe wall (indirect gain), and attached sunspace (isolated gain). Direct gain is the simplest and most common passive solar strategy. Sunlight enters the house through south-facing windows. Click to see full answer What are the three types of passive solar homes? The three…
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Does a fridge use convection?

Refrigerators operate using convection by circulating the gas through the copper lines inside of the refrigerator or freezer compartment. The lines, and the gas contained within them, absorb the heat contained in the refrigerator and freezer compartments, and are circulated back outside of the unit. Click to see full answer Do refrigerators have radiation? The…
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Should house vents be open or closed?

These vents allow outside air to circulate under the floor in summer to prevent the moisture buildup that encourages mildew and rot. In winter, when the air is drier, the vents are closed to reduce the chance that the pipes in the crawl space might freeze. Click to see full answer Should crawl space vents…
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What is COP in refrigeration formula?

COP = Energy Out/Energy In The energy out – the amount of heat moved by the heat pump – is measured in BTU/h, or British Thermal Units per hour. Click to see full answer How is refrigerator COP calculated? The coefficient of performance, COP, of a refrigerator is defined as the heat removed from the…
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What is Carnot engine class 11?

Solution : A carnot engine is an engine converting heat energy into mechanical energy using a cyclic process consisting of two isothermal and two adiabatic reversible process. <br> OR <br> A heat engine based on carnot cycle is known as carnot engine which works between two temperature. Click to see full answer What is the…
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Is 1 or 10 colder on AC?

Cool mode is the regular mode of most air conditioners and does not decrease the humidity in the air, but the temperature of the room. Some benefits of aircon dry mode include: Greatly dehumidifying the room. Energy-saving. Click to see full answer Is 1 or 10 colder on AC? The higher the number, the more…
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What do coolant additives do?

Cooling system additives work by transferring heat more efficiently through the radiator. They can be used with an antifreeze/water mix or with water alone.Feb 5, 2007 Click to see full answer What are supplemental coolant additives? Supplemental coolant additives (SCA's) are a chemical package added to coolant either as a liquid, powder or charge inside…
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What is the Carnot cycle used for?

Definition of Carnot cycle : an ideal reversible closed thermodynamic cycle in which the working substance goes through the four successive operations of isothermal expansion to a desired point, adiabatic expansion to a desired point, isothermal compression, and adiabatic compression back to its initial state. Click to see full answer Is Carnot cycle a heat…
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Why is gas compressor used?

Compressors are similar to pumps: both increase the pressure on a fluid and both can transport the fluid through a pipe. As gases are compressible, the compressor also reduces the volume of a gas. Liquids are relatively incompressible, so the main action of a pump is to transport liquids. Click to see full answer Why…
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Is it more expensive to run heat or AC?

When comparing an air conditioner (or heat pump) to an electric forced air furnace or other electric resistance heat, it's obvious that an air conditioner is much more efficient at moving heat energy. Click to see full answer Is air conditioning cheaper than electric heating? Superior energy efficiency – three times more efficient than an…
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