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What is Efficiency of shell and tube heat exchanger?
A shell and tube heat exchanger will have two fluids flowing through continuously. The fluid in the tube will typically be the important fluid, the fluid you are trying to heat or cool. The fluid in the shell will then be the fluid that is heating or cooling the the fluid in the tube.Take a steam heat exchanger for example. Steam condenses in shell, while the the fluid in the tube picks up the heat from the steam. And in a perfectly efficient steam heat exchanger, all the heat lost from the steam would be recovered by the liquid in the tube.But nothing is perfect. A little bit of the steam's heat makes the outer shell hot, and that in turn heats the room. Heat is lost from the steam into places other than the fluid in the tube. So efficiency measures how much of the heat lost by the shell fluid makes it into the tube fluid.Efficiency (for heating) = Amount of Heat that went toward heating the fluid divided by the amount of heat that was lost by the heating fluid.So an efficiency of 1 is perfect. For every 1 unit of heat absorbed by the tube fluid, we spent 1 unit of heat from the fluid in the shell fluid.And if the efficiency is 0.9, or 90%, then for every 10 units of heat that the shell fluid lost, the tube fluid gained 9.Sometimes efficiencies are as bad as 40%. In this case for every 10 units of heat lost by the heating fluid, 4 units are gained by the fluid.A slightly different definition of efficiency applies to cooling:Efficiency = Amount of heat lost by the tube fluid divided by the amount of heat gained by the shell fluid.Same story, if the shell fluid gains 5 units of heat, and tube fluid loses 4, then the efficiency is 0.8 or 80%.
How does double glazing work?
Double Glazing Stops Conduction and Convection but not radiation because you can see through glass: Double glazing keeps your house at a constant temperature because there is a vacuum in between two layers of glass. There is no air or particles of any kind in a vacuum, so heat cannot be conducted through it. Therefore the heat inside the building cannot be lost to outside, and vice versa. Windows are designed to let in light, while blocking air and objects from entering the house. In addition, windows provide some insulation, but not much. Windows are only a few millimeters thick, and heat can easily flow through them, making it more expensive to heat and cool your house. Double glazed windows are designed to let light through while blocking the movement of heat, turning your windows into good insulators.
How double glazing works.?
Double Glazing Stops Conduction and Convection but not radiation because you can see through glass: Double glazing keeps your house at a constant temperature because there is a vacuum in between two layers of glass. There is no air or particles of any kind in a vacuum, so heat cannot be conducted through it. Therefore the heat inside the building cannot be lost to outside, and vice versa. Windows are designed to let in light, while blocking air and objects from entering the house. In addition, windows provide some insulation, but not much. Windows are only a few millimeters thick, and heat can easily flow through them, making it more expensive to heat and cool your house. Double glazed windows are designed to let light through while blocking the movement of heat, turning your windows into good insulators.
How much will a 18000 utl heat pump heat?
1000 sq ft
How much amount of heat will produce in 22kilo ohm resistor?
If the resistor is conducting electrical current, then the power it dissipates (heat energy per second) is(current through it)2 times (22,000)or(voltage across it)2 divided by (22,000).If the resistor is connected in an unpowered circuit, or stored in a drawer, then it dissipates zero heat.
How much heat is lost through an open window?
The window how big is the window, kitchen window, slider?
How much energy is loss at each pyramid level and why is it loss?
An average of 90 percent of energy is lost at each pyramid level through respiration, heat, and waste.
Are there any fire place doors that can prevent soot build up?
I would try using glass doors for your fireplace. They can easily be cleaned with Windex or anything like that. The heat also will not transfer to the doors as much.
Between producer and secondary consumers about how much is lost to heat and waste?
Between producer and secondary consumers very little energy is lost to heat and waste. More energy is lost by keeping the organism alive than is lost to the environment.
What is heat rejection?
The heat of rejection, also known as just heat rejection, is when heat leaves a system. How much heat is lost depends on the system and its functionality.
Why ther is a heat surounding of the engine?
Combustion engines make power by burning fuel. Much of that energy is lost to heat.
How much heat lost by a 30.0g of iron with temperature from 56.7C to 25C?
0.43 kJ.
In a power plant energy is lost as what?
Energy is lost as heat. A typical nuclear power plant produces about twice as much energy as waste heat as it does in electricity. Other power plants are not much better, except for such things as more modern gas plants, which can used combined cycle to recover some of the lost heat (nuclear could too) and even do cogeneration use more waste heat to heat buildings (which nuclear plants probably cannot).
In the food chain how much of the Sun's energy is lost as heat before it reaches a producer?
90%
How much heat loss from muscle be an advantage for to humans rather than a disadvantage?
For heat loss to be an advantage to humans rather than a disadvantage, the heat lost must be equal to that produced.
Why do materials with high heat capacities heat slowly?
because by definition heat capacity is how much heat the substance needs to change its temperature by 1 degree. It "stores" heat and delivers it back slowly. It has nothing to do with heat resistance which is how much heat it allows through it.
Is all of the heat put into a heat engine eventually released through the exhaust?
No much is also radiated to the air
