"Dont Worry Be Hairy"
Question 1
Energy from biomass is an alternative for conventional fuels.
List 2 major types of available biomass energy resources in Malaysia and
explain its suitable engineering applications in challengers.
Question2
n-Butane fuel (C4H10) is burned with 150 percent theoritical air during a combustion
process. The combustion process is incomplete with 20 percent of the carbon in
the fuel forming carbon monoxide (CO)
a) Write balanced combustion equation
b) Determine
·
The
air fuel ration AF (kg air/kg fuel) (23.21kg air/kg fuel)
·
The
mole fraction of each reactant (0.979)
A shell and tube exchanger with 2 shell passes and 4 tube
passes is used to heat 10000 kg/h pressurized water in the tubes from 35 C to
120 C. The heating is to be done with 5000 kg/h water entering the exchanger at
300 C. If the overall heat transfer coefficient is 1500 W/m2.K Determine the
required heat exchanger area using;
a) LMTD Method
b) NTU Method
(Cp of
Water = 4.18 KJ/Kg.K)
(5.1 meter square)
