A binary geothermal power plant uses geothermal water at 160°C as the heat source. The plant...

A binary geothermal power plant uses geothermal water at 160°C as the heat source. The plant operates on the simple Rankine cycle with isobutane as the working fluid. Heat is transferred to the cycle by a heat exchanger in which geothermal liquid water enters at 160°C at a rate of 555.9 kg/s and leaves at 90°C. Isobutane enters the turbine at 3.25 MPa and 147°C and leaves at 79.5°C and 410 kPa. Isobutane is condensed in an air-cooled condenser and pumped to the heat exchanger pressure. Assume that the pump to has an isentropic efficiency of 90 percent. Take the specific heat of geothermal water is taken to be 4.258 kJ/kg·C. The properties of isobutane are given as h1 = 273.01 kJ/kg, v1 = 0.001842 m3/kg, h3 = 761.54 kJ/kg, h4 = 689.74 kJ/kg, and h4s = 670.40 kJ/kg. (a) the isentropic efficiency of the turbine, (b) the net power output of the plant, and (c) the thermal efficiency of the cycle.

Solutions

Expert Solution

genius_generous answered 1 year ago

Next > < Previous

Related Solutions

An insulated heat exchanger uses geothermal water to heat water for a chemical plant. Water enters...

An insulated heat exchanger uses geothermal water to heat water for a chemical plant. Water enters the heat exchanger at a rate of 36 kg/s and is heated from 23 ∘∘C to 69 ∘∘C. The geothermal water enters the exchanger at a rate of 41.4 kg/s and at an initial temperature of 130 ∘∘C. The specific heat of the geothermal water is 4.31 kJ/(kg K). Determine the rate of heat transfer between the two streams and the rate of entropy...

fill blanks: D) a geothermal power plant running on a binary power cycle uses ........... as...

fill blanks: D) a geothermal power plant running on a binary power cycle uses ........... as the working fluid. e) using biomass as a fossil fuel does nto contribute to global climate change because ................................. F) the three renewable froms of energy that each provide about 6% of the total energy consumed in the USA are ............... , .................. , and .............. G) when the atmospheric increases with altitude is called an .................

Design a geothermal source power generation system; a) Describe the type of geothermal power plant (Total...

Design a geothermal source power generation system; a) Describe the type of geothermal power plant (Total Flow / Flash / Binary) b) Describe the turbine isentropic efficiency c) Show the entire cycle in the T-s diagram. d) Calculate the power produced. answer for expert: Not all , just one of theese three ( Total flow / flash or binary)

A steam power plant operates with a boiler that is heated from a heat source at...

A steam power plant operates with a boiler that is heated from a heat source at 457 °C and produces 450 ton/hr. of steam. The steam leaves the boiler at 425 °C and 4 MPa. The steam reaches a turbine at 375 °C and 3 MPa and leaves it at 50 kPa with 4% liquid water. This mixture is flown into a condenser that rejects the heat into a river at 17 °C. Water leaves the condenser at 50 kPa...

Consider a residential heat pump that uses lake water as the heat source in the winter...

Consider a residential heat pump that uses lake water as the heat source in the winter and as heat sink inthe summer. The house is to maintained at a winter temperature of T= 18 degrees C and a summer temperature of T= 25 degrees C. To do this efficiently, it is found that the indoor coil should be at T= 50 degrees C in the winter and T= 5 degrees C in the summer. The outdoor coil temperature can be...

The initial investment for a geothermal power plant is $60,000,000 and is to be paid in...

The initial investment for a geothermal power plant is $60,000,000 and is to be paid in two years (year 0 and year 1) equally. The electricity generated by the plant is expected to bring revenue of 10,000,000 per year increasing at a rate of 3% annually. The total annual expenses of the plant will be 1,500,000 increasing at a rate 4% annually. The company that owns the plant plans to borrow 50% of the capital expenditure at a rate 6%....

Explain the biggest challenge in maintaining a geothermal power plant.

A heat engine uses a heat source at 580 ∘C and has an ideal (Carnot) efficiency...

A heat engine uses a heat source at 580 ∘C and has an ideal (Carnot) efficiency of 29 % . To increase the ideal efficiency to 46 % , what must be the temperature of the heat source?

An R-134 heat pump system obtains heat from a geothermal source and transfers 90,000 Btu/hr to...

An R-134 heat pump system obtains heat from a geothermal source and transfers 90,000 Btu/hr to an office building for space heating. The refrigeration cycle operates at pressure limits of 50 and 120 psia. If the compressor efficiency is 75%, find the power input (in hp and in Watts). (b) Find the COP for this heating application. If the building used electrical resistive heating rather than a heat pump, how much electrical power (in W) would be required? What is...

A heat pump uses groundwater at 12°C as an energy source. If the energy delivered by...

A heat pump uses groundwater at 12°C as an energy source. If the energy delivered by the heat pump is to be 60 MJ/h, estimate the minimum mass flow rate of groundwater if the compressor operates with R-134a between pressures of 100 kPa and 1.0 MPa. Calculate the minimum compressor power.

Subjects