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ISSN: 2277-3754 ISO 9001:2008 Certified International Journal of Engineering and Innovative Technology (IJEIT) Volume 2, Issue 12, June 2013 automotive diesel engines, one of the most promising technical solutions for exhaust gas waste heat utilization appears to be the use of a useful work. C Availability of Waste Heat from I.C. Engine The quantity of waste heat contained in a exhaust gas is a function of both the temperature and the mass flow rate of the exhaust gas: Table III. Specification of Engine Where, (1) is the heat loss (kJ/min); is the exhaust gas Manufacture Engine Bore Stroke Comp. Ratio Capacity Power Sp. Fuel Combustion RPM BHP@1800 rpm Cooling System Kirloskar Oil Engine Ltd., Pune Single Cylinder. 4-Stroke, Vertical Stationary C.I. Engine 87.5mm 110mm 17.5 661cc (0.661 Ltrs) 8 hp (5.9kW) at 1800rpm 220gms/kW-hr (0.22kg/kW-hr) 1800rpm 5.9kW Water Cooled mass flow rate (kg/min); is the specific heat of exhaust gas (kJ/kg°K); and is temperature gradient in °K. In order to enable heat transfer and recovery, it is necessary that the waste heat source temperature is higher than the heat sink temperature. Moreover, the magnitude of the temperature difference between the heat source and sink is an important determinant of waste heat‟s utility or “quality”. The source and sink temperature difference influences the rate at which heat is transferred per unit surface area of recovery system, and the maximum theoretical efficiency of converting thermal from the heat source to another form of energy (i.e., mechanical or electrical). Finally, the temperature range has important function for the selection of waste heat recovery system designs [12-13]. Table II. Temperature Range from Diesel Engine Table IV. Specification of Dynamometers Type Diameter of Rope Diameter 0f Brake Drum Effective Radius Rope Brake Type Dynamometer 25 mm 255 mm R= ( =140mm Sr. Engine No. Temperature in Exhaust heat loss through diesel engine Compression ratio ( ) Mass flow rate of fuel (on the basis of specific fuel consumption) 0.3177gms/sec Volumetric efficiency ( ) Mass flow rate of exhaust gas ( ) =+ = 8.625 + 0.3177 = 8.9427gm/hr = Heat loss in exhaust gas ( ) 1 Single Cylinder Four Stroke Diesel 456 Engine 2 Four Cylinder Four Stroke Diesel 448 Engine (Tata Indica) 3 Six Cylinder Four Stroke Diesel 336 Engine (TATA Truck) 4 Four Cylinder Four Stroke Diesel 310 Engine (Mahindra arjun 605 DI) 5 Genset (Kirloskar) at power 198hp 383 6 Genset (Cummims) at power 200hp 396 (Ref. - This temperature was taken from survey of various internal combustion engines.) Exhaustive survey was made for measurement of exhaust temperature from internal combustion engine of automotive vehicles and stationary engine it is shown in Table II. D. Heat Loss through the Exhaust in Internal Combustion Engine Engine and dynamometer specification is given in table III and IV. Heat loss through the exhaust gas from internal combustion is calculated as follows. Assuming, Volumetric efficiency ( ) is 0.8 to 0.9 Density diesel fuel is 0.84 to 0.85 gm/cc Calorific value of diesel is 42 to 45 MJ/kg Density air fuel is 1.167 kg/m3 Specific heat of exhaust gas is 1.1-1.25 KJ/kg°K 95PDF Image | Review on Exhaust Gas Heat Recovery for I.C. Engine
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