A closed system receives an input heat of 450 kJ and increases the internal energy of the system for 325 kJ. Determine the work done by the system.
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A liquid of mass 18 kg is heated from 25°C to 85°C. How much heat transfer is required? Assume Cp for water as 4.2 kJ/kg K.
During a flow process 5 kW paddle wheel work is supplied while the internal energy of the system increases in one minute as 200 kJ. Find the heat transfer when there is no other form of energy transfer.
In a Carnot cycle, the maximum pressure and temperature are limited to 18 bar and 410°C. The ratio of isentropic compression is 6 and isothermal expansion is 1.5. Assuming the volume of the air at the beginning of ...Read more
Anonymous
Asked: 2 months agoIn: Mechanical Engineering
Derive the efficiency of Otto cycle with the help of P-V and T-S diagram.
One kg gas is compressed adiabatically by following the law pV = C from initial temperature of 290 K. The initial pressure of gas is 1 bar. The initial and final volumes ...Read more
A 2-stroke oil engine has bore of 20 cm, stroke 30 cm, speed 350 r.p.m, i.m.e.p. 275 kN/m2, net brake load 610 N, diameter of brake drum 1 m, oil consumption 4.25 kg/hr, calorific value of fuel 44 ...Read more
Anonymous
Asked: 2 months agoIn: Mechanical Engineering
A two-stroke CI engine develops a brake power of 350 kW while its frictional power is 50 kW. Its fuel consumption is 180kg/h and works with an air -fuel ratio of 20:1. The heating value of the fuel ...Read more
The following observations were recorded during á test on a single cylinder oil engine – Bore = 300 mm, stroke = 450 mm, speed = 300 r.p.m., i.m.e.p. = 6 bar, net brake load = 1.5 kN, brake ...Read more
A gasoline engine with 2-Stroke configuration produces 28 kW and its frictional power 43.6 kW. It consumes air of 0.0556 kg/s and works with 1:10 of fuel-air ratio. The heating value of the fuel is 42000 kJ/kg. Calculate ...Read more
