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Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
- An air reservoir contains 20 kg of air at 3200 kN/m2 gauge and 16°C. Calculate the new pressure and heat energy transfer if the air is heated to 35°C. Neglect any expansion of the reservoir, take R for air = 0.287 kJ/kgK, specific heat at constant volume c, = 0.718 kJFg K, and atmospheric pressure = 100 kN/m2arrow_forwardThe steel cables supporting the "Lion's Gate" suspension bridge are approximate1y 1200 meters long. If the temperature ranges from –9° to +26 ° C between winter and summer extremes, calculate the variation in the length of the cables.Linear coefficient (steel): 12 x 10-6/ ° C .arrow_forwardSketch and explain a PV Diagram and a Temperature Entropy Diagram for a 4 stroke diesel enginearrow_forward
- 0.113 cubic meter of air at 8.25 bar is expanded in a cylinder until the volume is 0.331 cubic meters. Calculate the final pressure and work done if the expansion is Isothermal Adiabatic (take γ = 1.4)arrow_forwardThe effective radius of the pads in a single collar thrust block is 230 mm and the total load on the thrust block is 240 kN when the shaft is running at 93 rev/mm. Taking the coefficient of friction between thrust collar and pads to be 0.025, find (i) the power lost due to friction, (ii) the heat generated per hour, iii) the mass flow of oil in kilograms per hour through the block assuming all the heat is carried away by the oil, allowing an oil temperature rise of 20°C and taking the specific heat of the oil to be 2 kJ/kg k.arrow_forwardBrake Specific Fuel Consumption - 0.3 kg/kwh, Mechanical Efficiency- 90% Calorific Value of Fuel -45 MJ/kg. Given these values, find the indicated power, indicated thermal efficiency and brake thermal efficiency.arrow_forward
- The following data were taken during a one-hour trial run on a single cylinder, single acting, four-stroke diesel engine of cylinder diameter of 175 mm and stroke 225 mm , the speed being constant at 1000 rpm :Indicated mep: 5.5 barsDiam. of rope brake: 1066 mmLoad on brake: 400 NReading of balance: 27 NFuel consumed: 5.7 kgCalorific value: 44.2 MJ/kgCalculate the indicated power, brake power, specific fuel consumption per indicated kWh and per brake kWh , mechanical efficiency, indicated thermal and brake thermal efficiency.arrow_forwardState Charles's Law. A receiver contains 20 kg of air at 3200 kN/m sq. gauge and 16 degrees C . Calculate the new pressure and heat energy transfer if air is heated to 35 degrees C . Neglect any expansion of the reservoir. Take R for air = 0.287 kJ / kg / ° K ,Specific heat at constant volume Cv = 0.718 kJ / kg / ° K ,Atmospheric pressure = 100 kN/m²arrow_forwardDefine Mechanical Efficiency, Brake and Indicated thermal efficiencyarrow_forward
- Principles of Heat Transfer (Activate Learning wi...Mechanical EngineeringISBN:9781305387102Author:Kreith, Frank; Manglik, Raj M.Publisher:Cengage Learning