The refrigerant supplied to a compressor must be (a) superheated vapour refrigerant (c) a mixture of liquid and vapour refrigerant (d) none of these (b) dry saturated liquid refrigerant lled

Frost accumulates on the evaporators of forced-draft refrigerators because A. they are generally located within a house. B. they are generally located in high-humidity areas. C. they are low-temperature appliances. D. there is a heat exchange with the suction line.

Evaporative cooling PLEASE DO NOT USE PSYCHROMETRIC CHART. THANK YOU In the diagram below inlet air is drawn over a pool of liquid water in a steady-state, steady-flow isobaric process. Evaporation on the pool resultsin saturated air at the exit. The pool of liquid water is assumed to be at the same temperature as the exitair. Discharge fans at the exit provide a volumetric flow rate of 800,000 ft3/min.   In the diagram above inlet air is drawn over a pool of liquid water in a steady-state, steady-flow isobaric process. Evaporation on the pool resultsin saturated air at the exit. The pool of liquid water is assumed to be at the same temperature as the exitair. Discharge fans at the exit provide a volumetric flow rate of 800,000 ft^3/min. Problem #1: Assume that the exit temperature is T2 = 90 °F. For this model of the system and from thedata provided determine:a) The mass flow rate dry air through the system (lbm/sec).b) The rate of heat that is output from the R-134a condenser Qout…

When an evaporator experiences a heat- load increase, the suction pressure A. remains constant.

With diagram .In a steam jet refrigeration system, the evaporator is maintained at 6°C. The chilled water leaves at the same temperature and warms to 11°C as it absorbs the load. Make-up water in available at 25°C. For a capacity of 50 tons, determine  the volume of a vapor removed. Ans. (a) 8.381 kg/s, (b) 10.07 m3 /s

3. A room is maintained at design conditions of 75oF dry bulb and 50% RH. The air outside is at 95oF dry bulb and 75oF wet bulb. The outside air is conditioned and mixed with some room exhaust air. The mixed, conditioned air enters the room and increases 20oF in ……………The volume of air flowing through the coil is most nearly

How can I calculate the pressure 2 of a vapor compression refrigeration system, if in state one my pressure is 0.101. How can I calculate the increase in pressure in state 2? the system is located in a zone at 24C with a humidity of 90%. My refrigerant to use is 134a

Question on D-F Also why not assume that P1=P4?

Provide complete solution and detailed diagram.  A 3 m3 air tank has an initial pressure of 120 kpa and 35oC. The heat is added until itspressure increases to 250 kpa. Find the heat added during the process. A. 874.55 KJ          B. 762.33 KJ            C. 972.82KJ           D. 1083.34 KJ

23. A 5.2m3 tank contains nitrogen, which is evacuated from 100kPag to a pressure of 98kPagvacuum. Determine the mass of pumped out nitrogen if initially the temperature is 510K and thefinal temperature is 100K.a. 6.3274kg b. 5.8802kg c. 6.4656kg d. 6.2169kg