FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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A steam power plant operates on the Rankine Cycle. The steam enters the turbine at 7 Mpa and 550 with a velocity of 30 m/s. It discharges to the condenser at 20kpa with a velocity at 90 m/s. Calculate the net workin kw for a flow of 37.8kg/s.
a. 23.23 Mw c. 34.22 Mw
b. 53.34 Mw d. 46.54 Mw
An electric power plant operating on the Carnot cycle puts heat into a river with a water temperature of
(15 °C), what must be the maximum temperature that the working material puts forward in the plant to be
efficient (40%), and if it is required to produce a capacity (20MW), what is the quantity rejected and
Additive heat per unit time.
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- Thermodynamics (Carnot Cycle) An Ocean Thermal Energy Conversion (OTEC) power plant produces 25000 kW of ouput using warm surface water temperature of 29°C and a cold deep-water temperature of 12°C. Assume it is a carnot cycle and density of cold water to be 1000 kg/m3. Calculate the efficiency. Options: a. 9.44% b. 3.68% c. 5.63% d. 58.62%arrow_forward10 0.9967. Ans. H.W 2 A smaller power plant produces steam at 3 MPa, 600 C, in the boiler. It keeps the condenser at 45 C by the transfer of 10MW out as heat transfer. The first turbine section expands to 500 kPa, and then flow is reheated followed by the expansion in the low-pressure turbine. Find the reheat temperature so that the turbine output is saturated vapor. For this reheat, find the total turbine power output and the boiler heat transfer. Answer. (Reheat temperature= 529°C , total turbine power output= 6487 kW, the boiler heat transfer= 16 475 kW)arrow_forwardIt has been suggested that a building could be heated by a refrigeration engine operating in a Carnot cycle. The engine takes heat from the outside at 280 K and delivers heat to the building a 295 K. How much work would have to be done for every kilo joule heat delivered to the building?arrow_forward
- The cycle comes with a net power cycle of 25.40 kW. The heat that goes out is 42.30 kW. Find the efficiency of the cycle?arrow_forwardA diesel engine in a power plant with efficiency of 36%is running at 850 rpm and developed a torque of 28,000 kg-cm. It uses fuel oil with sp.gr of .9339. Calculate the heat charge and fuel consumptions in barrel per month.arrow_forwardHeat 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.arrow_forward
- Please i want the answer son as possiblearrow_forwardIn a steam turbine steam at 2 MPa, 360°C is expanded to 8 kPa. It then enters a condenser, where it is condensed to saturated liquid water. The pump feeds back the water into the boiler. Assume ideal processes, find per kg of steam the net work and the cycle efficiency. 3(360°C) 2 MPa 8 kPaarrow_forwardCarnot Cycle A, B, C are connected in series so that the heat rejected from A will be the heat added to B and heat rejected from B will be added to C. Each cycle operates between 303K and 4000C. If heat added to A is 1000 kW, find the work output of C, kW, nearest tenths.arrow_forward
- 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 LParrow_forwardConcentrating solar power plants are frequently located in desert areas where they can collect a lot of solar energy. If the power plant produces steam at a temperature of 1,016 oF and is cooled with ambient air at a temperature of 106 oF what is the maximum efficiency of the conversion of solar energy to electricity? Give your answer in percent (%).arrow_forwardIn a Rankine cycle, steam leaves the boiler and enters the turbine at 4 MPa, 400C. The condenser pressure is 10 kPa. What is the pump work in kJ/kg?arrow_forward
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