Chapter 6, Problem 6.22P

Sketch these thermodynamic process on a PV diagram

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Thermodynamics problem. Answer letter G to I only.

Boiler evaporates 31500 kg / hour of water at a pressure of 165 bar and temperature 350 C and the temperature of feeding water 125 C. If you know that the mass of Burning coal every hour is 4680 kg and its calorific value is 26100 kg / kg, find:.1. Boiler efficiency 2. Equivalent evaporation (from) * .and (at) 100 C per kg of coal

5. Gas Power Cycle in a Closed System with External Heat Exchange Air in a closed system undergoes the following reversible three-step cycle: 1-2 Isothermal compression of air at T1 = 27°C. The initial pressure is p1 = 2bar 2-3 Isochoric heating to T3 = 1200K . %3D 3-1 Adiabatic reversible expansion to state 1. Consider air as ideal gas with variable specific heats, and gas constant R kJ 0.287 kgK' As you solve the problem, populate the table with the data you need. Use free columns as you like. State T/ p/ v/ u/ h/ 1 2 3 a) Draw the process curve in a p-v-diagram, and in a T-s-diagram. b) Determine the volume V2 = V3 c) Determine work and heat per unit mass of air for each step. d) Determine the thermal efficiency of the cycle. e) The engine runs at 1800 rpm and delivers 12 kW of power. Determine the air mass in the engine and the swept volume. The engine is externally heated, and does not exchange air with the surroundings.

Q/ Super-heated vapor enters condenser of a steam power plant at 2 bar and 250 °C. The vapor is condensed at 0.2 bar and 60 °C. Condensed cooling water enters into another streamline at 25 °C and the water exits at 40 °C. The heat is transferred from the condensing steam to the cooling water with no change in kinetic and potential energies. Calculate (a) the ratio of the cooling water mass flow rate to the condensing steam mass flow rate. (b) The specific heat transfer from the condensing steam to the cooling water. Steam 2 bar 200 C Coodensate 0.2 bar 2 60 C Cooling Cooling water water 25 C 40 C

Show step by step  x = 100  SN = 7

Air as an ideal gas flows through the compressor and heat exchanger shown in the figure. A separate liquid stream also flows through the heat exchanger. The data given are for operation at steady state. Stray heat transfer to the surroundings can be neglected, as can all kinetic and potential energy changes. Determine the compressor power, in kW, and the mass flow rate of the cooling water, in kg/s.

Rankin cycle (Thermodynamics) Show complete and step by step solution. And show the diagram.