100 kw are produced at 35% efficiency. How much power must be put in for this to be true?
100 kw are produced at 35% efficiency. How much power must be put in for this...
3. What is the mechanical power (kW) of the turbine? How much power (kW) does the generator provide N 750 kW n generator = 0.75 Turbine Generator 1 turbine = 0.8
A generating station supplies power to the following : (i) a lighting load of 100 kW; (ii) an induction motor 800 h.p. (596·8 kW) p.f. 0·8 lagging, efficiency 92%; (iii) a rotary converter giving 150 A at 400 V at an efficiency of 0·95. What must be the power factor of the rotary convertor in order that power factor of the supply station may become unity ?
A person in good physical condition can put out 100 W of useful power for several hours at a stretch, perhaps by pedaling a mechanism that drives an electric generator. Neglecting any problems of generator efficiency and practical considerations such as resting time: (a) How many people would it take to run a 5.00 kW electric clothes dryer? (b) How many people would it take to replace a large electric power plant that generates 500 MW?
3.4-17 An aperture antenna with a true area of 12 m2 is excited by a 100-kW transmitter at 4.6 GHz. Radiated power is measured to be 96.3 kW when the antenna's power gain is 18,440 (or 42.66 dB). Find (a) radiation efficiency and loss, (b) directivity, (c) aperture efficiency, and (d) effective area.
A 5 MW gas turbine power plant is reported to have a thermodynamic efficiency of 35%. Assume products of the combustion reaction exit at 750K with water in the gaseous phase. What is the corresponding heat rate of the power cycle? How much methane (kg/h) is required to power this plant?
A 65-V generator supplies 3.3 kW of power. How much current does the generator produce?
A gasoline engine has a power output of 170 kW (about 2.28×105 hp ). Its thermal efficiency is 22.0 %. 1- How much heat must be supplied to the engine per second? Express your answer in joules per second. 2-How much heat is discarded by the engine per second? Express your answer in joules per second.
A heat engine with an efficiency of 35% does 1200 J of work. (a) How much energy (in Joules) is extracted from the hot reservoir? (b) How much energy (in Joules) is exhausted to the cold reservoir?
63 kW is to arrive at a town over two 0.070 Ωlines. Estimate how much power is saved if the voltage is stepped up from 240 V to 2400 V and then down again, rather than simply transmitting at 240 V . Assume the transformers are each 99% efficient. Psaved= _____ kW
24-1: The net power produced by an air-standard Brayton cycle is 1500 kW. The pressure ratio for the cycle is 12 and the minimum and maximum temperatures are 20˚C and 1450˚C respectively. The isentropic efficiencies of the compressor and turbine are 0.75 and 0.80 respectively. Assume an ambient pressure of 100 kPa. Determine: a. The thermal efficiency of the cycle b. The mass flow rate of the air, in kg/s. c. The heat added during the combustion process, in kW....