Chapter 8, Problem 8.126EP

The refrigeration system of a food production firm is run using the Reversed Carnot Cycle. The temperature of the hot refrigerant supply in the system should be 52°C, while the temperature of the sink should be -14°C. Its capacity is projected to be at least 24 tons. It's important not to disregard losses. Find and Show unit analysis and conversion: a. COP and COP of Heat Pump b. Heat rejected from the system in kW c. Network in, Hp and Energy Efficiency Ratio

Q 2: - A one cylinders Freon (134a) compressor has a Bore and Stroke 5.4 and 4.8 cm respectively. It is speed 1450 rpm volumetric efficiency c.v 100% working fluid reaches expansion valve at 42°C and the temperature %3D of its suction -8°C:- a- Find the mass flow rate of the refrigerant, heat capacity and COPact& COPtho? b- Find the mass flow rate of the refrigerant, heat capacity and COP & COPtho if the clearance factor will be 5%?

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A refrigeration system operates an ideal vapor compression using R-143a with an evaporator temperature of-30°C and the condenser exist temperature of 50°C and requires 75 KW motor to drive the compression. What is the cooling capacity of the refrigerator in KW? And find COP.

In a marine steam propulsion plant,feed water leaves the feed heater and enters the main feed pump at 270 F and a gauge pressure of 35 psi . For isentropic process,find for the water :  A. Specific volume  B. The internal energy  C. The enthalpy  D. The entropy

In a 14 TR ammonia refrigeration plant, the condensing temperature is 250C and evaporating temperature -100C. The refrigerant ammonia is sub-cooled by 5 0C before passing through the throttle valve. The vapor leaving the evaporator is 0.97 dry. Find: 1. Coefficient of performance: and 2. Power required. Use refrigerant table for properties of ammonia at 250C and -100C.

Solve with me time 50 minutes ..Calculate the ideal cycle efficiency and specific steam consumption (S.S.C.) of a regenerative eycle with triple extractions, as shown in Figure 1, with boiler outlet steam pressure and superheat steam temperature are 8 MPa and 500 °C, respectively, and condenser pressure 9.6 kPa. If the steam flowing through the turbine is 100 kg/s, also find the power output. Determine the heat rate of the turbine, which is defined as "the heat required at the turbine inlet per unit of power generated." (Assume the turbine extraction bleed steam pressures such that temperature difference between T, and T, is approximately equally divided. Neglect work input to boiler feed pump. Also assume that on completion of regenerative feed heating, the enthalpies of both the compressed feedwater and condensed steam are equal to the enthalpies of the saturated liquid corresponding to the respective extraction bleed steam pressures

Cogeneration is often used where a steam supply is needed for industrial process energy. Assume a supply of 5 kg/s steam at 0.5 MPa is needed. Rather than generating this from a pump and boiler, the setup in below. is used so the supply is extracted from the high-pressure turbine. Find the power the turbine now cogenerates in this process. 2 3 HP LP

. A refrigerating system operates on a Vapor compression Refrigeration cycle. The high temperature is at 49C while the low temperature is -12C. The heat absorbed is 70.32 kW. Find the heat rejected and power input.