Chapter 5, Problem 5.60P

3.5 thermodynamics

4.10

The following processes occur in a reversible thermodynamic cycle: 1-2: 0.2 kg heating at constant pressure 1.05 bar at specific volume 0.1 m3/kg and work done -515 J. 2-3: Isothermal compression to 4.2 bar. 3-4: Expansion according to law pv1./= constant. 4-1: heating at constant volume back to the initial conditions. Using file 3, which figure number is associated the process? ?

The figure below shows a turbine-driven pump that provides water to a mixing chamber located dz = 45 m higher than the pump, where n = 80 kg/s. Steady-state operating data for the turbine and pump are labeled on the figure. Heat transfer from the water to its surroundings occurs at a rate of 2 kW. For the turbine, heat transfer with the surroundings and potential energy effects are negligible. Kinetic energy effects at all numbered states can be ignored. h = 417.69 kJ/kg Mixing chamber Ocy = 2 kW Steam P3 = 30 bar T; = 400°C dz Turt Pump P4 =5 bar -4 T = 180°C Saturated liquid water m, Pj = 1 bar Determine: (a) the magnitude of the pump power, in kW. (b) the mass flow rate of steam, in kg/s, that flows through the turbine.

The figure belows shows three components of an air-conditioning system, where T3 = 95°F and m3 = 3 lb/s. Refrigerant 134a flows through a throttling valve and a heat exchanger while air flows through a fan and the same heat exchanger. Data for steady-state operation are given on the figure. There is no significant heat transfer between any of the components and the surroundings. Kinetic and potential energy effects are negligible. m₁ = Saturated liquid R-134a T3, m3 i Throttling valve lb/s P4 = 60 lbf/in.² Air T₁=535°R Cp = 0.240 Btu/lb-ºR Fan wwww ²+² 2 T₂=528°R Wey=-0.2 hp Modeling air as an ideal gas with constant cp = 0.240 Btu/lb. °R, determine the mass flow rate of the air, i lb/s. Saturated vapor P5 P4 -Heat exchanger

I need to draw the graph also.

5. Two kilogram of certain gas with R = 0.218 kJ/kg-K undergoes a process and results to the following changes: AH = 2190 kJ, AU = 1460 kJ. E. If the process is internally reversible non-flow at constant pressure, what is the heat transferred during the process?

After graduation, you take a job with the Acme energy services company. Your first job is to purchase high efficiency heat pumps. The heat pumps employ mechanical power and a heat engine to provide heat at TH = 100°C. A low temperature heat sink at TC = 20ºC is also available. A salesman shows you two models. Performance data for each model operating at steady state are provided in the Figure below

The figure below shows a turbine-driven pump that provides water to a mixing chamber located dz⁢= 5 m higher than the pump, where m˙=50 kg/s. Steady-state operating data for the turbine and pump are labeled on the figure. Heat transfer from the water to its surroundings occurs at a rate of 2 kW. For the turbine, heat transfer with the surroundings and potential energy effects are negligible. Kinetic energy effects at all numbered states can be ignored.   Determine:(a) the magnitude of the pump power, in kW.(b) the mass flow rate of steam, in kg/s, that flows through the turbine.