! Required information A power plant burns coal to produce pressurized steam at 548 K. The steam then condenses back into water at a temperature of 330 K. If the plant operates at 50.0% of its maximum efficiency and its power output is 1.23 × 108 W, at what rate must heat be removed by means of a cooling tower? 5.077x10^8 W

! Required information A power plant burns coal to produce pressurized steam at 548 K. The steam then condenses back into water at a temperature of 330 K. If the plant operates at 50.0% of its maximum efficiency and its power output is 1.23 × 108 W, at what rate must heat be removed by means of a cooling tower? 5.077x10^8 W

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter28: Special Refrigeration Applications

Section: Chapter Questions

Problem 15RQ: Why is two-stage compression popular for extra-low-temperature refrigeration systems?

See similar textbooks

Similar questions

The net work for a given reheat Rankine cycle is 80MW. Steam at 10 MPa and 500C enters the first turbine and then, the second turbine at 1.2 MPa and 500C. Saturated liquid exits the condenser at 20 kPa. Draw the schematic and T-S diagrams. Label the points by setting point 1 at the condenser outlet, point 2 at the pump outlet, point 3 at the boiler outlet, point 4 at the reheater inlet, point 5 at the reheater outlet, and point 6 at the condenser inlet. Use 2 decimal places for the enthalpy and other energies in solving and for the final answers. For the steam quality (x) and entropy (s), use 4 decimal places in solving. For the specific volume, use 6 decimal places. IMPORTANT: USE THE STEAM TABLES FROM CENGEL'S BOOK ONLY (uploaded already in the files section). Determine the following: Enthalpy at point 2 in kJ/kg = Enthalpy at point 4 in kJ/kg = Enthalpy at point 5 in kJ/kg = Enthalpy at point 6 in kJ/kg = Thermal Efficiency in % = Heat added in kJ/kg = Heat rejected in…
1. Determine the Rankine efficiency of a condensing steam turbine operating in a Rankine cycle as follows: Steam pressure - 200 psiaSteam temperature - 1000 FExhaust pressure - 2 in Hg absoluteSteam rate - 1.5 lb/kW-hr 2. If the no. 1 problem has a thermal efficiency of 30%, how many barrels of 30 °API fuel oil will be required to produce 1000 kW-hr of power. Neglect the pump work.
A steam power plant operating on iregenerative cylce includes one feedwater heater [back word]. steam enters the turbine at 4500KPA and 500C and extracted from the turbine at 350KPA. what is thermal efficiency of the cycle ? TTD = 5
5. A steam turbine receives 362,500 kg/h of steam throttled at 8.70 MPa and 410°C. Steam leaves the high pressure turbine shell at 2 MPa with 7.58°C of superheat. Reheated steam is at 1.9 MPa and 410°C. Condensate is at 78°C. For a generator output of 100MW at 94% efficiency, calculate: (A) Combined thermal effficiency (B) Actual condition of the exhaust steam (C) thermal efficiency of an ideal engine
A medium size power station is used to produce 30 MW net power for arefinery. The station uses steam as the operating fluid and operatesaccording to the Carnot cycle between the pressure limits of 0.4 bar and35 bar. Steam enters the boiler as a saturated liquid and leaves it as adry saturated vapour. (i) Calculate the thermal efficiency of the power station if theisentropic efficiency of the steam turbine is 94%. (ii) State main disadvantages of using the Carnot cycle as the basis fora power station. (iii) State the name of the cycle that is used in practice in powerstations, along with three key benefits over the Carnot cycle.
Solve neatly and write legibly. show diagrams Indicate reference used to determine the properties of water Steam enters a reheat-regenerative turbine at 6 MPa and 400 o C. After partial expansion to 1.24 MPa the steam is withdrawn and passed through a reheater until temperature is 350 o C. Steam then re-enters the turbine at 0.22 MPa where m 1 is extracted for feedwater heating. Remaining steam expands to a condenser pressure of 0.015 MPa. On the basis of 1 kg throttled steam, find:a) W and W p , b) Q A and Q R , c) thermal efficiency of the cycle and engine, d) steam rate of the cycle and engine, e) heat rate
The influence of maximum temperature on the efficiency of a Rankine cycleis desired. Holding the maximum and minimum pressures constant at 1000psia and 2 psia, respectively, what is the thermal efficiency if the boiler outletsteam temperature is (a)8000F, (b)10000F, and (c)12000F?
A:0£ I 26ll 4ll HMW-7.pdf > HMW-7: Steam Turbine Power Cycles Steam enters the turbine at 10 MN/m and 450°C. The steam expanded isentropically in the turbine down to the condenser pressure of 20 kN/m?. The power developed by the plant is 5600 kW. The condensate leaving the condenser is pumped to the boiler pressure isentropically. Taking into account the pump work and calculate: • The mass of steam generated in the boiler. • Cycle thermal efficiency. • Specific steam consumption. Draw the cycle on a T-s diagram. Hint: 1 MN/m² = 10 bar ...
Solve neatly and write legibly. show diagrams Indicate reference used to determine the properties of water Steam enters a reheat-regenerative turbine at 6 MPa and 400 o C. After partial expansion to 1.24 MPa the steam is withdrawn and passed through a reheater until temperature is 350 o C. Steam then re-enters the turbine at 0.22 MPa where m 1 is extracted for feedwater heating. Remaining steam expands to a condenser pressure of 0.015 MPa. On the basis of 1 kg throttled steam, find: a) steam rate of the cycle and engine, b.) heat rate
In a Reheat Cycle steam enters the turbine @ 40 bar and 400 C. It expands isentropic ally to 6 bar and is reheated at constant pressure to 400 C. This steam expanded isentropic ally to 1 bar and is reheated at constant pressure to 200 C. Finally this steam is expanded isentropic ally in the condenser pressure of 0.1 bar. Determine the thermal efficiency and the capacity of the boiler if 10,000 KW of power output is required.
When a steam boiler generates saturated steam at 2.5 mpa and the condenser pressure is 20 kpa, what is the Rankine cycle efficiency?Show complete step-by-step process and solution.
In an ideal reheat cycle, the steam throttled condition is 8 MPa and 480 degree C. the steam is then reheated to MPa and 460 degree C. the turbine exhaust is 60 degree C. The required values of some state point properties are tabulated below. 5. Calculate the thermal efficiency of the cycle