Refrigerant R-134a at 400 kPa and T1=10⁰C  enters an adiabatic diffuser steadily with a velocity of 600 m/s and leaves at 600 kPa andT2= 100 ⁰C. Determine: a) The exit velocity b) The inlet to exit area ratio c) The inlet exit density ratio

Refrigerant R-134a at 200 kPa and 50 ⁰C enters an adiabatic diffuser steadily with a velocityof 140 m/s and leaves at 500 kPa and 150 ⁰C. Determine:  a) The exit velocityb) The inlet to exit area ratioc) The inlet exit density ratio    clear writing please

An adiabatic compressor brings 5 ​​kg/h of air from atmospheric pressure, 300 K and an enthalpy of 300 kJ/kg to 1.8 MPa and 670 K and an enthalpy of 750 kJ/kg. a) What is the global efficiency of the compression equipment if it consumes 1.2 kW of electrical current? b) What is the volume change of air generated by the compressor?

a) A fan is installed in a residential building to provide proper ventilation. This fan is connected to a duct with 11.6 cm diameter and provides the average air velocity of 5 m/s. By regulation, the minimum fresh air requirement is specified to be 0.35 air changes per hour (ACH) which means 35% of the entire air contained in a room should be replaced by fresh outdoor air every hour. Determine: House 0.35 ACH 200 m² Figure Q2a i. The flow capacity of the fan in litres/min ii. What the height of the residential building should be.