Calculate the number of modules required in the Photovoltaic array. Photovoltaic system feeds a DC motor to produce 2 HP at the shaft with motor efficiency of 75 %. Solar cells are arranged in 9x4 matrix with 21% cell efficiency and its size is 0.155 x 0.155 m. Assume global radiation incident to the panel as 1kW/square metre.

Calculate the number of modules required in the Photovoltaic array. Photovoltaic system feeds a DC motor to produce 2 HP at the shaft with motor efficiency of 75 %. Solar cells are arranged in 9x4 matrix with 21% cell efficiency and its size is 0.155 x 0.155 m. Assume global radiation incident to the panel as 1kW/square metre.

Sustainable Energy

2nd Edition

ISBN:9781337551663

Author:DUNLAP, Richard A.

Publisher:DUNLAP, Richard A.

Chapter9: Electricity From Solar Energy

Section: Chapter Questions

Problem 16P

See similar textbooks

Similar questions

i) What is a photovoltaic cell? ii) A certain solar cell type has an output capability of 0.5 A at 0.4Volts. A series / parallel solar array has been designed of such cells with 80 parallel strings and each string has 1500 cells in series. Calculate: (i) Voltage capability (ii) Current capability and (iii) Power output capability of the array.
A 2 x 2 m flat plate solar collector for domestic hot water heating is shown in the figure. The incident solar radiation on the glass cover, which transmits 90% of the incident flux, is 750 W/m2. Water flows through the tubes soldered to the backside of the absorber plate, entering at a temperature of 25°C. The temperature of the glass cover is 27°C, and it radiates heat with an emissivity of 0.92 to the sky at –50°C. Additionally, the glass cover losses heat by convection to air at 20°C flowing over its surface at 30 km/h. Assume that the radiation heat transfer between the absorber plate and glass cover and the heat transfer through the back and sides of the collector is negligible.
An electronic package with a surface area of 1 m² placed in an orbiting space station is exposed to space. The electronics in this package dissipate all 1 kW of its power to the space through its exposed surface. The exposed surface has an emissivity of 1.0 and an absorptivity 0.25. Determine the steady state exposed surface temperature of the electronic package (a) if the surface is exposed to a solar flux of 750 W/m², and (b) if the surface is not exposed to the sun.
An incandescent lamp filament has area 40 mm and operates at a temperature of 1127°C. Assume that all the energy furnished to the bulb is radiated from it. If the filament's emissivity is 0.83, how much power must be furnished to the bulb when it is operating? (b)
Determine the luminous efficacy of the following lamps having comparable illumination outputs:a. A 300 W incandescent lamp that emits 5820 lmb. Two 32 W linear fluorescent lamps that emit 2950 lm per lamp in a luminaire that consumes 70 W including the ballastsc. A 70 W metal halide lamp that consumes 88 W, including the ballast and emits 5500 lm
Calculate the decrease in heat loss in kilowatt-hours per day when a 1.2 m x 2.1 m uncoated single-pane window is replaced with a double-glazed window with a low-e coating and argon fill (a relatively common configuration for current win- dows). The inside temperature is a constant 20°C, and the outside temperature is a constant -5°C.
A 50-L electrical radiator containing heating oil is placed in a 50-m³ room. Both the room and the oil in the radiator are initially at 5°C. The radiator with a rating of 3 kW is now turned on. At the same time, heat is lost from the room at an average rate of 0.3 kJ/s. After some time, the average temperature is measured to be 20°C for the air in the room, and 60°C for the oil in the radiator. Taking the density and the specific heat of the oil to be 950kg/m³ and 2.2kJ/(kg °C), respectively, determine how long the heater is kept on. Assume the room is well-sealed so that there are no air leaks.
Write any two differences between photovoltaic system and solar thermal technology.
The information for a solar PV system is given below:Number of PV modules: 5The number of PV cells in one PV module: 36Area of each PV cell = 225 cm2(Select the values as insolation E= 900 w/ m2and efficiency of each module= 16%)If the five PV modules are connected in Series:a. Total output powerb. Total output voltagec. Total output current
4. An incandescent lamp has a tungsten filament whose resistance is 96 ohm at its operating temperature of 2900°C. Calculate the filament resistance when the lamp is disconnected from the electric source under which conditions the temperature is 24°C.
Calculate the change in 5 m long copper wire when its temperature changesby 60º C.
11-5. Estimate the power required to provide 2 mg/L of ozone from dry air for the plant of If the power cost is $0.08/kWh, what is the annual power cost for V=12.8 - ozone-generation? 112 uning ultraviolet