Find the requested quantities for the circuit. We used the mesh-current method to identify the meshes. We then identified the me
sh currents and wrote a KVL equation for each mesh and a constraint equation for the dependent source that defines its controlling variable in terms of the mesh currents. We solved these equations simultaneously for the unknown mesh currents and constrained current, and we checked the solution by verifying that the power in the circuit balances Now use the mesh-current values to calculate the voltage v0 and the total power generated in the circuit. Enter your answers directly on the figure.
1 answer:
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Answer:
(a) The power input to the compressor:
(b) The volume flow rate of the refrigerant at the compressor inlet:
Explanation:
(a)
We need to check the values of enthalpy (as we have an open system) for both states, being the inlet, state 1 and the outlet, state 2. We will know these values by checking the vapor charts of R134a, I used the ones found in Thermodynamics of Cengel, 7th edition.
Then, our values are:
Now we proceed to know the work with the following expression:
Now we replace values and our result is:
(b)
To know the volume rate at the compressor inlet, we need to know the specific volume in that phase, as we have that is saturated and at -24°C, we can read our table:
With our specific volume and the mass rate, we can calculate the volume rate:
Answer:
True
Explanation:
By definition of steady flow we have
where f(x,y,z,t) is any property of the system under consideration
=> f(x,y,z,t) = constant