(2) MATERIAL AND METHOD
First we developed a experimental set up in mechanical department in UIT RGPV Bhopal.
This set up mainly two parts one is four stroke four cylinder diesel engine coupled with rope brake
dynamometer and second part the exhaust pipe or tail pipe of diesel engine connected a shell and
tube heat exchanger after catalytic convertor. In first set system water as a refrigerant and other
system ammonia as a refrigerant. Exhaust pipe is connected to Shell side and refrigerant is connected
to Tube side. The flow of refrigerant in heat exchanger with help of one hp pump and refrigerant is
collected in the reservoir which is situated in bottom of the pump. In second set Ammonia as a
refrigerant and water as absorbent. Absorber or tank is divided into two parts, one part filled with
LiBr-H2O solution and another part filled with Aqua-Ammonia solution .Heat exchanger and pump
are common for LiBr-H2O refrigeration system and Aqua-Ammonia refrigeration system.. This heat
exchanger used as a generator of absorption refrigeration system. Temperature and pressure
measurement of inside and outside of heat exchangers with help of thermocouples and u tube
manometers. From this experimental set up we measure the different parameters of diesel engine and
its performance effects on performance of absorption system.
(2.1) SHELL AND TUBE HEAT EXCHANGER: Shell and Tube heat exchanger is common type
heat exchangers. These are reliable design method and shop facility is available for successful design
or construction method. This heat exchanger are design for high pressure relative to environment and
high pressure difference between the fluid streams .These heat exchanger are used as a condenser,
feed water heater, steam generator and refrigeration and air conditioning purpose .The major
components of this heat exchanger are tube bundle, shell .front head end, rear head end, baffles and
tube sheet. TEMA (Tubular Exchanger Manufacturers Association) standards are used for designing
of generator of automobile air conditioning purpose. Thermal stress, mechanical stress, vibration
problem and erosion are important parameters consideration when designing shell and tube heat
exchanger. High pressure, corrosion fouling and high heat transfer fluid flow (water or ammonia) are
used in tube side and low heat transfer fluid or exhaust gases of diesel engine are used in shell side.
Dimension of heat exchanger are given in tabulated form after calculation.
(2) MATERIAL AND METHOD