Chapter 8, Problem 8.115EP

find the specific enthalphy at each point of the cycle, the amount of heat added, heat rejected, turbine work, pump work, net work and thermal efficiency in a carnot cycle between pressure limits of 3MPa and 10KPa

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A heat pump shown is driven by 2.5 MW motor and receives heat from a source at 80 C and deliver energy to a boiler that operates at constant pressure and saturation temperature of 130 C. The water enters the boiler as saturated liquid and leaves as saturated vapor at the same temperature. The heat pump operates with a COP (coefficient of performance) that is 70% of a Carnot heat pump COP. Find: 1- the maximum mass flow rate of water the system can deliver 2- the heat received from the cold source Q, boiler mwater eb TH V HP 2.5 MW TL=80°C

Find the maximum thermal efficiency possible for a power cycle operatingbetween 1200 oF and 225 oF?

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A Factory uses a vapor absorption refrigerator to cool its products, the heat is supplied to generator by steam at 150 C (hfg=2500kJ/kg) and 90% dry. The temperature of the evaporator is to be maintained at -5 C. the refrigeration capacity is 20 Tonnes and actual COP is 70% of the maximum, atmospheric Pressure is 1 bar and ambient temperature 30 C. find the maximum COP. mass of steam per hour

E Expert Q&A Show the heat pump that operates on the ideal vapor-compression refrigeration cycle, with refrigerant-134a as the working fluid, on T-s diagram as in Figure (1). T House Он 1.4 MPa Win 320 kPa 4 step: 2 of 8 For the given ideal vapor-compression refrigeration cycle, with refrigerant-134a as the working fluid,specific entropy, specific enthalpy, pressure, and specific volumeat state are $i, ", , and Virespectively. Also, the saturated liquid state is denoted by the subscript f, the saturated vapor is denoted by the subscript g, and the properties at latent stage are denoted by the subscript fg. th step: 3 of 8 (a) Use “saturated refrigerant-134a 00 00 Tools 88 Home Courses 2.

A geothermal power plant has the thermal energy at well head of 1,289 KJ, mass of the liquid of 82 kg, and specific enthalpy at final stage of 4.12 KJ/KG, what is the value of work at the heat utilization system of the plant?

Heat is transferred to a heat engine from a fumace at a rate of 120KW. If the rate of waste heat rejection to a nearby river is 50000W. Find the net Power output and the thermal efficiency for this heat engine.