Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
If the sea power plant described in Problem 11.5 is to deliver power at $8/106 Btu, estimate the maximum permissible cost of the condenser and evaporator heat-exchanger surface in dollars per square foot, assuming a 20-year life, 10% discount rate, and 7% yearly fuel inflation. The next two problems are open-ended with no solutions:
Problem 11.5
A 100 MW ocean thermal gradient power plant is to be designed for a location where the ocean surface temperature is 300 K (80°F) and water at a lower depth is available at 278 K (40°F). If the heat exchangers are sized to operate a power plant using R-22 as the working fluid between 294 and 284 K (70°F and 50°F), calculate the flow rates of R-22 and water required, assuming that the condenser heat exchangers have an overall conductance of 1000 W/m2·K (176 Btu/h·ft2 °F) and an effectiveness of 100%. Also calculate the plant efficiency and the surface area of the condenser. The saturation pressure of R-22 at 294 K is 9.38 × 105 N·m2 (136.1 psia), the enthalpy is 256.8 kJ/kg (110.4 Btu/lbm), and the entropy is 0.900 kJ/kg·K (0.215 Btu/lbm°R). The enthalpy of the saturated liquid at 284 K is 56.45 kJ/kg (24.27 Btu/lb) and the heat of vaporization is 197.0 kJ/kg (85.68 Btu/lbm). The saturation pressure at 284 K is 6.81 × 105 N·m2 (98.73 psia), while the entropy at 284 K of the saturated liquid is 0.217 kJ/kg K (0.0519 Btu/lbm°R).
Assume efficiencies for the pump and the turbine are 80% and 90%, respectively. The specific volume of the saturated R-22 liquid at 284 K is 0.000799 m3 /kg (0.0128 ft3 /lb). A schematic diagram of the system is shown as follows:
A reservoir of water is drained by a 10-inch-diameter, square-edged orifice with center at elevation 289.12 that flows directly into a stream with water surface at elevation 293.59. The elevation of the reservoir surface is 296.85. Find the flow ..
Calculate the period of the resulting beat - An airplane wing modeled as a spring-mass system with natural frequency 40 Hz is driven harmonically by the rotation of its engines at 39.9 Hz.
helium is used to operate an 18 hp gas turbine. the gas enters the steady-flow device at 220 fts through an area of
Find the average normalized power in the waveform.- Determine Mean.- Determine Variance of the sampled output X.
assuming a constant concentration gradient and constant number of atoms at the surface calculate the approximate
derive the variation of transmitted x-ray intensity as a function of incident intensity thickness density and mass
a engineer designs a heat engine using flat-plate solar collectors. the collectors deliver aeat at 70 degrees c and
a circular sign has a diameter of 50cm and is subjected to normal winds up to 150kmh at 10 degrees celsius and 100kpa.
steam enters an adiabatic turbine at 800 psia and 900f and leaves at a pressure of 40 psia. determine the amount of
develop algorithms for the explicit solution of the kinematic equations when applied to a problem of runoff from a
The swi handler should alternate starting the two non-real-time threads. You can use switches for inputs and LEDs for outputs so that you can interact with the system.
A cold air-standard Brayton refrigeration cycle has a pressure ratio of 4 and a refrigeration rate of 15 kW. Air enters the compressor at -7oC. The high pressure air is cooled to 27 oC by rejecting heat to the surroundings. It is further cooled to -1..
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd