Question 4 Dodecane C12h26 Can Be Used As A Good Approximation To Diesel Fuel A Determine The Gravimetric Air To Fue 1 (96.62 KiB) Viewed 46 times
Question 4 Dodecane C12h26 Can Be Used As A Good Approximation To Diesel Fuel A Determine The Gravimetric Air To Fue 2 (16.67 KiB) Viewed 46 times
Question 4 Dodecane (C12H26) can be used as a good approximation to Diesel fuel. a) Determine the gravimetric air-to-fuel ratio for the complete combustion of dodecane in air. b) Low temperature combustion is being developed in Diesel engines to reduce the NOx emissions. Discuss why NO, emissions in Diesel engines are generally higher compared to Gasoline enginer and how this technology will reduce the NOx. Question 5 A refrigerator uses refrigerant 134a as the working fluid and operates on an ideal vapour compression refrigeration cycle between Eand FMPa. The refrigerant is expanded using an expansion valve. If the mass flow rate of the refrigerant is Gkg/s. a) Calculate the COP of the refrigerator. The throttling valve between the condenser and the evaporator is replaced by a turbine (whose operation can be considered isentropic). b) Without further calculation and with reference to the T-s plot, discuss what impact the new turbine will have on the COP of the refrigerator.
Parameter A B с L-Imon Value 185 163 1461 290 0.16 19.2 4.5 74 -13 6.9
Join a community of subject matter experts. Register for FREE to view solutions, replies, and use search function. Request answer by replying!