Chapter 9, Problem 9.72P

SU-2 A gas at 500K is in a cylinder with a frictionless piston. The gas goes thru a reversible cycle during which it absorbs 400J from a reservoir at 500K. During part of the cycle the gas rejects heat Q to a reseroir at 300K. Let the system be defined as the gas. a) What is the change in entropy for the system for one cycle of operation of the engine? Briefly explain your answer. b) Find the change in entropy for the universe for one cycle of operation of the engine. Briefly explain your answer. c) Find the change in entropy for the surroundings for one cycle of operation of the engine. Briefly explain your answer. d) Use your results from the previous parts to find how many joules of heat were rejected to the 300K reservoir during this process.

PLEASE SHOW COMPLETE SOLUTION (DRAW THE TS DIAGRAM)

1. Steam at 10 MPa, 500°C has an ideal engine turbine that has one stage of reheat, K] exhaust is at 0.005 MPa and 85% quality. The work produced by the engine is 800 kg. Determine the thermal efficiency of the turbine.

How do I do this questions in steps? Stuggling with how to find the isentropic work for the efficiency of the turbine. Please have written out or neat solutions that arent copied and pasted math.

Air in an ideal diesel is compresses from 8 liters to 0.15 and then expands during the constant pressure heat addition process to 0.3 L. Under cold air standard conditions, find the thermal efficiency.

A refrigerator compressor receives R-134a at a rate of 0.08 kg/s at -10 C, 150 kPa and delivers it at 1000 kPa, , 50 C. The input power to the compressor is 3.5 kW. The compressor is cooled with atmospheric air coming in at 25 C and leaving at 32 C. Determine the mass flow rate of airTake the air as an ideal gas with constant specific heat Cpair . That ish4-h3 = Cpair (T4-T3)

Please help me solve this as soon as possible, and I will surely leave you a like.

find the specific enthalphy at each point of the cycle, the amount of heat added, heat rejected, turbine work, pump work, net work and thermal efficiency in a carnot cycle between pressure limits of 3MPa and 10KPa

1. In a steam power plant steam enters the turbine at 6 bar and 400°C and is expanded isentropic ally to the condenser pressure of 0.1 bar. If the isentropic efficiency of the turbine is 80%, find the actual net work output and the thermal efficiency.