FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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A single flash geothermal steam power plant is
operating at maximum turbine power output with
a geofluid flowing from the production well at 250
°C. The mass flow of entering the adiabatic
separator is 70 kg/s. The exit pressure of the steam
turbine is 15 kPa. The turbine isentropic efficiency is
90 %. Neglecting the pump work, calculate:
1. The steam quality at the turbine exit
2. The mass flow rate at the turbine exit
3. The turbine output power
4. The reinjection well temperature
A flashed-steam geothermal power plant is located where underground hot water is available as saturated liquid at 600 kPa. The flashed steam enters a turbine at 529 kPa, 98 % quality and expands to 15 kPa, when it is condensed. The flow rate from the well is 28.9kg/s. Over-all efficiency is 90%. Determine the power produced by the plant in KW.
Please solve the given problem.
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- how do i calculate for a power plant, iv. The rate of heat rejection at the condenser; andv. Determine the rate of entropy generation in that power plant. Please provide examplearrow_forwardPls. refer to the answer keys so that I will know if my solution is wrong.arrow_forwardA turboprop engine consist of a diffuser, compresser, combaster, turbine and nozzle. the turbine druves a propeller as well as the compressor. air enters the diffuser with a volumetric flow rate of 83.7m3 /s at 40KPa, 240K and a velocity of 180m/s, and decelerate essentially to zero velocity.the compressor ratio is 10 and the compressor has an isentropic efficiency is 85%.the tuebine inlet temperature id 1140K, and it's isentropic efficiency is 85%. the turbine exit pressure is 50kPa. flow through the diffuser and the nozzle is isentropic. sketch the process on the T-s diagram and using an air standard analysis, determine i. the power delivered to the propeller, in MW ii. the velocity at the nozzle exit, in m/sarrow_forward
- I need the answer as soon as possiblearrow_forwardR134a is 400 kPa as saturated vapor to the compressor in a refrigerator system. enters at a pressure of 1.2 MPa and is compressed at 70 oC. (Mass flow rate 0.02 Take kg/h.) a) Actual work of the compressor, If the power drawn by the compressor is 2 kW, Calculate the efficiency of the compressor amd show the cycle in the T-s diagramarrow_forwardA flashed-steam geothermal power plant is located where underground hot water is available as saturated liquid at 620 kPa. The flashed steam enters a turbine at 530 kPa, 98 % quality and expands to 15 kPa, when it is condensed. The flow rate from the well is 27.8 kg/s. Over-all efficiency is 90%. Determine the power produced by the plant in KW.arrow_forward
- The enthalpy entering the turbine of a geothermal power plant is 2750 KJ/kg and ,ass rate of 1 Kg/sec. The turbine brake power is 1000 KW condenser outlet has enthalpy of 210 KJ/kg. If temperature rise of cooling water in condenser is 8, what is the mass of cooling water requirement?arrow_forward3. A 1.5 kW pump delivers 1.2 kg/s water to a building. The water comes in at 100 kPa, and 15°C. The outlet water velocity must be 30 m/s and the pump has an isentropic efficiency of 75%. What is the maximum exit pressure the pump can produce? (Answer: 587.5 kPa) *Hint: The Mechanical Energy Balance may be making a return on this problem!arrow_forwardClassify the gas turbines based on working principle? Explain any one system in detail with diagram?arrow_forward
- Steam is delivered to turbine at 5.4 MPa and 600 degree C. Before condensation at 31 degree C, steam is extracted for feed water heating at 0.6 MPa. The turbine exhaust is 60 degree C. the required values of some state point properties are tabulated below. 9. Calculate the total pump work of the cyclearrow_forward19arrow_forwardConsider the operation of an actual turbine in a gas turbine engine. The mass flow rate is 50 lbm/s. The turbine inlet temperature is 2040 deg F. The pressure ratio in the compressor is 18.15. The turbine efficiency is 0.91. Assume variable specific heats. The turbine exit temperature is approximately Group of answer choices 1320 deg R 1220 deg R 1200 deg R 1090 deg Rarrow_forward
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