An air compressor takes in air at a pressure of 100 kPa and a temperature of 300K The compressor is cooled at a rate of 15 k/kg and the mass flow rate is 50 kg/minute. The air leaves at a pressure of 600 kPa and a temperature of 420 K. What is the work that needs to be input to the compressor to achieve this rate of flow? You may use a cp of 1.006 k/kg-K. Give your answer to three significant digits in kilowatts don't put kw in your answerl)

Refrigerant-134a (R-134a) enters the expansion valve of a refrigeration system at 650 kPa with a quality of 20%. The pressure of R-134a at the outlet is 200 kPa. a)Determine the temperature of R-134a at the outlet in oC. Calculate the difference of internal energy between the outlet and inlet in kJ/kg

A rigid tank of volume 10 m³ initially contains saturated water vapor at a temperature of 120 °C. Steam at a pressure 1.2 MPa and a temperature of 400 °C enters the tank through a valve in steam line that is connected to the tank until the final pressure in the tank is 800 kPa, at which time the temperature is 200 °C. All kinetic and potential energy effects can be neglected. A schematic of the problem and properties at all state points except state 1 are shown in the figure below. All of the properties at state 2 and the inlet state i are provided on the figure. Initial State in Tank T₁-120 °C, Sat. vapor u₁=? kJ/kg V₁=? m³/kg Pi=1.2 MPa, Ti-400 °C hi-3261.3 kJ/kg V=10 m³ Final State in Tank T: 200 °C, P₂-800 kPa u₂= 2631.1 kJ/kg v₂=0.26088 m³/kg Qout For Question 6: The initial specific internal energy, u1, of the saturated vapor in the tank in kJ/kg is

The valve connected to a 450-liter insulated tank of air at 250 kPa and 50̊C is opened,allowing the gas to escape until its pressure drops to 120 kPa. An electric heater insidethe tank maintains the temperature at 50̊C. Using variable specific heats, Determine thefollowing:a) The mass of air withdrawn (kg)b) The energy input to the resistor (kJ)

An adiabatic vessel has a valve that allows some water to be released. Initially it has 500 Kg of saturated liquid wate at a temperature of 50°C. Find the following: The temperature of remaining water if 10 Kg of water vapor escapes through the valve. If the remaining water is at 20°C, find the amount of water escaped as vapor. Assume specific heat of water, C = 4 Kj/Kg-K and Enthalpy of vaporization of water, AHvap 2400 Kj/Kg

Steam expands in a turbine from 6 Mpa and 500 Celsius to 0.2 Mpa and 150 Celsius at a rate of 1.2kg/s. Heat is lost from the turbine at a rate of 34KJ/s during the process. Find the power output of the turbine.