Respuesta :
If the actual thermal efficiency of the plant is 60% of the maximum is Heat capacity of water is 4.2 kJ/kgK so the temperature rise is 2.53 K
The maximum efficiency is that of Carnot engine. Let's suppose the
power plant is Carnot engine, so
n=1 -Tc/Th
=1-293.15/588.15
=0.5
(b) The actual efficiency is 60% of the maximum so
n = 0.6 . 0.5
= 0.3
Heat capacity of water is 4.2 kJ/kgK so the temperature rise is
ΔT= 1750 . 10³ kJ/s / 165 . 10³ kg/s . 4.2 kJ/kgK
ΔT =2.53 K
In thermodynamics, a device's thermal efficiency is a dimensionless performance metric. Examples of such devices include internal combustion engines, steam turbines, steam engines, boilers, furnaces, refrigerators, and air conditioners. A system's thermal efficiency is determined by how much work is produced for every unit of heat input. Work is produced by heat engines. The percentage of heat that is converted into useful work is expressed by thermal efficiency. The carbon footprint of a building is significantly decreased by an envelope that is thermally efficient.
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