Q11. In a vapour absorption refrigeration system, heating, cooling and refrigeration takes place at the temperatures...
2- In vapour compression refrigeration system, compressor is used because a. It increases cooling effect of cycle b. It makes possible, to remove heat from refrigerant at atmospheric pressure c. It increases the coefficient of performance of the system d. It removes thermal properties of refrigerant 3- The area under pressure volume curve of any thermodynamic process represents a. heat rejected only b. heat absorbed only c. heat absorbed and rejected d. work done 4. What is the correct formula...
An absorption refrigeration system receives heat from a source at 110°C and maintains the refrigerated space at -20°C. If the temperature of the environment is 25°C, what is the maximum COP this absorption refrigeration system can have?
determine 1) sub cooling achieved in the heat
exchanger, 2) refrigerant flow rate, 3) cop of the plant
ii) A refrigeration unit with 100-ton capacity operates in a vapour compression O refrigeration cycle between the temperature limits of 308 and 263 K. It uses R-12 G as a refrigerantC A heat exchanger is inducted in the circuit in between the condenser and the expander, The refrigerant vapour leaving the evaporator is superheated in the heat exchanger in the countercurrent flow...
3/ A LiBr-H2O absorption cooling system contains of one solution heat exchanger, generator, condense an evaporator, and an absorber. The temperatures of the main components °C at condenser, 10 °C at evaporator, and 30 °C at absorber. The cooling capacity at the evaporator is are 100 °C at generator, 40 100 Ton, and the flow rate of the pump is 34.2 kg/min. And the temperature at outlet of heat exchanger and the inlet to the generator is 52 °C Find...
In a vapor-compression refrigeration heat pump cycle with Refrigerant 134a as the working fluid provides heating at a rate of 15 kW to maintain a building at 20 °C year-round. During the heating mode in the winter, the outside temperature is 5 °C. It is also used for cooling in the summer when outside temperature is 34 °C. Saturated vapor at 2.4 bar leaves the evaporator and superheated vapor at 8 bar leaves the compressor. There is no significant heat...
In a vapor-compression refrigeration heat pump cycle with Refrigerant 134a as the working fluid provides heating at a rate of 15 kW to maintain a building at 20 °C year-round. During the heating mode in the winter, the outside temperature is 5 °C. It is also used for cooling in the summer when outside temperature is 34 °C. Saturated vapor at 2.4 bar leaves the evaporator and superheated vapor at 8 bar leaves the compressor. There is no significant heat...
In a vapor-compression refrigeration heat pump cycle with Refrigerant 134a as the working fluid provides heating at a rate of 15 kW to maintain a building at 20 °C year-round. During the heating mode in the winter, the outside temperature is 5 °C. It is also used for cooling in the summer when outside temperature is 34°C. Saturated vapor at 2.4 bar leaves the evaporator and superheated vapor at 8 bar leaves the compressor. There is no significant heat transfer...
QV An absorption system use LiBr-H2O solution. The system consists of two he exchangers (refrigerant heat exchanger and solution heat exchanger). All temperatures are shown in figure 2 below. The cooling capacity at the evaporator is 100 Tons. Calculate the rate of heat transfer at the generator, the temperatures at point 4 & 9 and the overall COP. 5 cond, 40°C- Gen. 100 c 43 C Ref.Heat Solution Heat Exchanger E.v Abs. 30 C Pump.
QV An absorption system use...
PLEASE ANSWER #6
PLEASE ANSWER #6
Figure 1 presents a seawater cooled steam ejector refrigeration/Heat Pump System for Naval Surface Ship Applications. A Steam Ejector Refrigeration System is thermally driven heating and cooling technology by changing the pressure to control the boiling temperature which will enhance evaporation of fluid to realize cooling purpose. A heat pump system is to utilize the phase change of fluids to realize heating and cooling purpose. Please answer following questions: exhaust gas boiler nozzle section...
Question 2 A vapour compression cycle acts as both a heat source (radiators and a hot water load) and a cooling load (food preservation). The system requires an operating temperature of 50°C to support the bulk of the heating load and -10°C for the cooling load. a) Determine the operating pressures of the cycle in bar. Also, assuming we require a maximum temperature of 90°C to operate certain higher temperature heat processes (for hygiene related reasons), determine the enthalpy at...