Equilibrium is when all forces on an object are balanced true or false?
1 answer:
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Answer:
The heat exchanger is 29.26 kJ/s.
The exit temperature of geothermal water is 117.37°C.
Explanation:
Given that,
Specific heat
Initial temperature = 25°C
Final temperature = 60°C
Specific heat by geothermal
Temperature = 140°C
Mass flow rate = 0.3 kg/s
We need to calculate the rate of heat transfer in heat exchange
Using formula of rate of heat transfer in heat exchanger
Put the value into the formula
We need to calculate the exit temperature of geothermal water
Heat transferred to feed water= Heat transferred by geothermal water
Hence, The rate of heat exchanger is 29.26 kJ/s.
The exit temperature of geothermal water is 117.37°C.
The first law of thermodynamics states that:
where
is the variation of internal energy of the system
Q is the heat absorbed by the system
L is the work done by the system on the surrounding.
In this problem, the system absorbs 15 J of heat, so Q=+15 J (with positive sign, since it is heat absorbed by the system) while the work done by the system is L=+7 J (with positive sign, since it is work done by the system), so the variation of internal energy is
where
Q is the heat absorbed by the system
L is the work done by the system on the surrounding.
In this problem, the system absorbs 15 J of heat, so Q=+15 J (with positive sign, since it is heat absorbed by the system) while the work done by the system is L=+7 J (with positive sign, since it is work done by the system), so the variation of internal energy is