AaBbCcDd AaBbCcDd AaBbC AaBbCcC AaBAaBbCcD AaBbCcDd AaBbI Normal 1 No Spac. Heading 1 Heading 2TitleSubtitleSubtle Em. Emp-ParagraphStylesThere is a hot water source in New Delhi.Our plan is to use this heat source for heating and hotwater supplies of a site of 100 hostels. The outlet temperature of the water from the source is170°C.4- An official realizes that the outlet temperature of the groundwater is too high and is consideringusing it to generate electricity. Design an Organic Rankine Cycle (ORC) suitable for this purpose.(Ctrl)

Given data, T0=100°Cη=0.9need to determine the power required.

Answered: There is a hot water source in New…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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The engine on a steam ship runs on the Rankine cycle. The steam leaves the boiler at 20 bar and 350°C. The turbine has an efficiency of 75% and an outlet pressure of 1 bar. The pressure changes in the boiler and condenser can be considered negligible, and the liquid leaving the condenser is saturated. A. Determine the operating temperature of the condenser, and compute the efficiency of a Carnot cycle operating between the boiler and condenser temperatures. B. Determine the actual efficiency of this Rankine cycle and compare it to the Carnot efficiency. C. When the Titanic was sinking, the Carpathia received the S.O.S. and immediately set course to attempt a rescue. The captain of the Carpathia ordered the hot water turned off in the passengers’ cabins (Lord, 1955). What effect do you expect this action had?
T B A D Consider the cycle in the diagram (very similar to the Rankine Cycle) using water as the working fluid. Process A-B: A saturated mixture of water is pumped from low pressure to a high pressure saturated liquid in an iso-entropic (and adiabatic) process. Process B-C: The high pressure saturated liquid enters a boiler where it is heated at constant pressure process by an external heat source to a super-heated vapor. Process C-D: The super-heated vapor goes through a turbine, generating power exiting as a saturated vapor. Assume an iso-entropic (and adiabatic) process and neglect kinetic energy and potential energy changes. Process D-A: The saturated vapor then enters a condenser where it is condensed at a constant pressure process back to its original state. The boiler operates at 10 MPa (points B & C) and the condenser operates at 100 kPa (points A & D). Assume a mass flow rate of 1 kg/s. a) Make a table of the temperature, pressure, volume, internal energy, enthalpy, entropy…
Consider a steam power plant, which can be modeled using the ideal reheat Rankine cycle. The steam entering the high- pressure turbine is at 6 MPa and 400 degrees C and leaves at 2 MPa. The steam is then reheated to 400 C at constant pressure, before it expands to 20 kPa in the low-pressure turbine. Calculate: (a) the turbine work output in kJ/kg (b) the thermal efficiency of the cycle
2. An electrical power plant that uses the Rankine cycle has a pump to increase the water pressure and multiply it by 50. In addition, there is a boiler whose fuel has a calorific value of 35 MJ/kg. The water that enters the process has a temperature of 60 °C and is at atmospheric pressure. The steam that leaves the turbine has a quality of 70% and the work generated in the turbine is 300 MW. a. How much water is needed to run the plant? b. What is its efficiency?
Ocean thermal energy conversion (OTEC) plants use the temperature difference in the ocean (80°F at the surface and 40°F at 2000 ft. depth) in a Rankine cycle to generate electricity. Ammonia is the working fluid. Ammonia is boiled using the 80°F surface water, and condensed against the 40°F deep water, which is pumped to the surface. Very large heat exchangers are required, due to the small LMTDs and the low plant thermal efficiency (2.5%). The heat exchangers will comprise 40 % of the plant cost. In order to reduce the condenser cost, we will evaluate the condenser tube material savings provided by the use of a vertical fluted "Gregorig" condensing surface. The reference smooth tube condenser design uses 1.0 in. I.D. aluminum tubes, 0.062 in. wall x 30 ft. long. Sea water flows on the tube-side at 8 ft/sec. Ammonia condenses at 50°F on the outer surface of the vertical tubes with 4Tvs = 4°F. The ammonia properties at 48°F are: p= 39.1 lbm/ft³, k₁= 0.307 Btu/hr-ft- °F, и 1.426 × 10-2…
In a steam power cycle, the steam supply is at 15 bar and in a dry and saturated condition.The condenser pressure is 0.4 bar. Calculate the Carnot and Rankine efficiencies of the cycle.Ignore the work of the pump.
T B A D Consider the cycle in the diagram (very similar to the Rankine Cycle) using water as the working fluid. Process A-B: A saturated mixture of water is pumped from low pressure to a high pressure saturated liquid in an iso- entropic (and adiabatic) process. Process B-C: The high pressure saturated liquid enters a boiler where it is heated at constant pressure process by an external heat source to a super-heated vapor. Process C-D: The super-heated vapor goes through a turbine, generating power exiting as a saturated vapor. Assume an iso-entropic (and adiabatic) process and neglect kinetic energy and potential energy changes. Process D-A: The saturated vapor then enters a condenser where it is condensed at a constant pressure process back to its original state. The boiler operates at 8 MPa (points B & C) and the condenser operates at 200 kPa (points A & D). Assume a mass flow rate of 1 kg/s. Make a table of the temperature, pressure, volume, internal energy, enthalpy, entropy and…

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