7. A bank of solar cells supplies power to a 95% efficient electric water heater. The area of the solar cell bank is 500 ft. The solar cell bank has a maximum theoretical efficiency of 31% and receives an incident solar flux of 150 W/m2. The heater boils water to make saturated steam at 30 psig to supply a turbine. Feedwater enters the boiler as saturated liquid at 140 deg.F. Calculate the total power in the bank. A. 7370 Btu/hr B. 7004 Btu/hr C. 7040 Btu/hr D. 7800 Btu/hr

7. A bank of solar cells supplies power to a 95% efficient electric water heater. The area of the solar cell bank is 500 ft. The solar cell bank has a maximum theoretical efficiency of 31% and receives an incident solar flux of 150 W/m2. The heater boils water to make saturated steam at 30 psig to supply a turbine. Feedwater enters the boiler as saturated liquid at 140 deg.F. Calculate the total power in the bank. A. 7370 Btu/hr B. 7004 Btu/hr C. 7040 Btu/hr D. 7800 Btu/hr

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

See similar textbooks

Similar questions

REFRIGERATION ENGINEERING
Answers are included, but I need the work.
1. The heat absorption and rejection temperatures of a Carnot refrigeration cycle are -8°C and 36°C, respectively. The rate of heat absorption is 28 kW.A. Calculate the COP of the refrigeration cycle. B. Calculate the power input to the cycle in kW. C. If a Carnot heat pump operating between the same temperatures absorb 18 kW from the cold region, calculate the rate of heat supply to the hot region in kW. D. Calculate the COP of the heat pump.
! Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -30°C by rejecting its waste heat to cooling water that enters the condenser at 18°C at a rate of 0.29 kg/s and leaves at 26°C. The refrigerant enters the condenser at 1.2 MPa and 65°C and leaves at 42°C. The inlet state of the compressor is 60 kPa and -34°C and the compressor is estimated to gain a net heat of 430 W from the surroundings. The heat exchanger loses no heat to the environment. 26°C ↑ 42°C Condenser Expansion valve Evaporator OL Water 18°C 2 kW. 1.2 MPa 65°C W; in Compressor 60 kPa -34°C Determine the refrigeration load. (Take the required values from saturated refrigerant-134a tables and steam tables.) (You must provide an answer before moving on to the next part.) The refrigeration load is
The following image describe a single-flash geothermal power plant. We have the follow informations about the system: The flash chamber (throttling valve) is a isenthalpic device The system is adiabatic The power generated by the turbine is 10kW The pressure and temperature at point 4 are 50 kPa and 100°C respectively The pressure at separator is 500 kPa The separator has the function of separating the phases of a saturated mixture The mass that exits the system through the separator is 5 times the mass that exits the turbine. The pressure at point 1 is 1 MPa If all the information is sufficient, fill in the table below and plot all the points on a T x v graph.
2. A surface condenser serving a 50,000-kW steam-turbo generator unit receives exhaust steam at the rate of 200,000 kg/hr. Vacuum in condenser is 0.88025 bar. Sea water for cooling enters at 27°C and leaves at 40°C. For steam turbine condenser as heat given up to cooling water. Calculate the LMTD.
A refgeration plant working on a sinple vapour compression cycle with pressure limits of 2.1 bar and 13.5 bar produces q cooling effect of 50kw. The refrigerant is dry saturated at the exit of evaporator and saturated liquid at the exit of condenser. Determine the power required by the compressor to run the refigeration plant . The properties of the refrigerant is given below. Take the specific heat of refrigerant vapour as 2.903 kJ/kg K
Ill leave a thumbs up if u answer the followings pls. Determine the following: a. Pump work in kj/kg b. The heat added in the boiler c. The turbine work
3) A cascade refrigeration system uses R22 in the low temp unit and R12 in the high temp unit. The system develops 28 kW of refrigeration at -45°C. The R12 system operates at -12°C evaporating temp and 40°C condensing temp. There is a 10° overlap of temperatures in the cascade condenser. Calculate the power required by R22 compressor, and the power required R12 compressor.
2. An otto engine has a clearance volume of 6%. It produces 300kw of power. Determine the amount of heat rejected.
your client needs to know about the mass flow rate ofsteam needed for a 1500 kW plant. The heat supplied to the steamin the boiler is 2700 k//kg, the heat rejected by the steam to thecooling water in the condenser is 2000 kJ/kg, and the feed pumpwork required to pump the condensate back into the boiler is 3.5 kWCalculate the mass flow of steam required
Please solve