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How do you derive efficiency formula from heat rate for stem turbine?
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What is thermal efficiency?
Thermal efficiency is the efficiency of a heat engine measured by the ratio of the work done by it to the heat supplied to it.
How do you calculate the efficiency of a power plant when you know its heat rate?
Efficiency = (860.4*100)/(Heat rate in kCal/kWh) or Efficiency = (860.4*4.18*100)/(Heat rate in kJ/kWh) Ex 1: if heat rate is 2500 kCal/kWh, then efficiency is 34.416% Ex 2: if heat rate is 9000 kJ/kWh, then efficiency is 39.96%
How do thermal energy transfer to electrical energy?
Either heat air and force through a turbine, or heat water into steam (and use a turbine or a steam engine). Then connect to a generator.
What energy changes take place in the turbine?
heat to mechanical
Which engine wastes the most energy?
I would say, heat engine on earth would waste the most energy since it is always limited by thermodynamic efficiency to have some loss. In general, lower the temperature difference will resulted to lower the efficiency, a simple steam engine for a train would be of lower efficiency than a internal combustion engine and lower than complex high pressure steam turbine and is probably the lowest engine efficiency in commercial scale.
What will be the effect to the thermal efficiency to a simple Rankine cycle when the turbine work output decrease?
The efficiency will decrease.Remeber the formula for effiency for a cycle:What we want over what we pay for. So,ηT=WT/QAWhereWT = Work done by the turbineQA = Heat taken from the hot reservoir
What is reheat factor in power plant?
The reheat factor in the steam turbine refers to the Thermodynamic effect on the turbine efficiency. Others factors includes the cumulative heat, and the steam turbine condition curve.
What is the effect or reheater in the gas turbine?
1.Turbine output is increased for same compressor work. 2.As more heat is supplied,thermal efficiency decreases.
Why vacuum is created in condenser on steam turbine?
Firstly, vacuum is being created in turbine exhaust and condenser rather than being required. It is created to reduce the back-pressures and to improve the turbine efficiency. Also, with vacuum the designers can design large size last stage blades of LP turbine for maximizing the turbine output.
What is the effect of steam turbine control valve throttling in turbine efficiency?
In Boiler follow turbine mode , Boiler produces a constant pressure behind throttling valve and throttling valve adjusts necessary pressure and required steam as High Pressure steam for entering the turbine . In Valves Wide Open (VWO) mode the efficiency is maximum and we haven't any loss. (It's nearly 106% Turbine MCR) . In Turbine MCR , we have a little loss and consequently a little bit worse heat rate . In partial load , loss is more and efficiency worse.
What is formula for thermal efficiency?
Thermal Eff = (mechanical heat produced/electrical heat produced) x 100%
Why is it advantageous to use steam as hot as possible in a steam driven turbine?
in practice;the steam MUST be in the superheated region before entering the turbine.superheated steam means there is not moister in the steam (dry steam)the reason is moister will damage the turbine blades.in theory;the hotter the temperature the better the efficiency (look up vapor power cycles)work done by the turbine = the enthalpy (at temp. of steam entering the turbine)- the enthalpy at the turbine exist.the efficiency = work done by the turbine / the heat input.
Steam turbine heat rate formula?
The efficiency of a steam turbine is just the ratio of power out to power in, but if you want to be able to calculate it from the basic mechanical design, this is a specialised topic. In the link below is a general description of steam turbines, in the references and additional reading list there are some references that may help you.
What is heat rate of steam turbine How to calculate heat rate of steam turbine?
manish
Why pelton turbine is used for high head?
pelton wheel is used for high heat because it has less loses....n more efficiency... pelton wheel is used for high heat because it has less loses....n more efficiency... eeeeeee.com parama boka dheni chudaka
Is the efficiency with which a generator in the hub of a wind turbine converts shaft power to electrical power subject to Carnot's theorem?
No. Carnot's theorem applies to heat engines - machines that convert heat to other types of energy.
Operation of a combined cycle power plant?
A combined cycle power plant has multiple thermodynamic cycles. This increases efficiency. For example, a gas turbine can be used to produce electricity, but only about 40% of the heat is actually converted in the process. 60% of the heat is lost, and in a single cycle plant would be considered waste heat. In a combined cycle plant, that waste heat could be used to drive a second, steam turbine to produce more electricity. In such a case, the efficiency could be increased from 40% to nearly 60%. It is possible to go further. The waste heat from the combined cycle electric plant can be used to heat buildings, for instance, increasing overall efficiency to more than 65%. This is called Cogeneration.
