28-10-2010, 04:53 PM
[attachment=6950]
ENVIRONMENTAL FRIENDLY REFRIGERATION &
AIR CONDITIONING SYSTEM
SUBJECT:
AUTOMOBILE A/C BY UTILISING
WASTE HEAT & GASES
PRESENTED BY:
MS. KIRAN G. HORE
MS JYOTI S. KOTECHA
(MECHANICAL ENGINEERING)
ABSTRACT
It is the established fact that only about 30% of heat supplied by the fuel is converted into useful work, in case of internal combustion (I.C) engines and the rest is going waste to the atmosphere in the form of coolant losses (35%) and exhaust gas losses (35%). The conventional air conditioning system which most of the A/C vehicles use is the ‘vapour Compression refrigeration system ‘, in which the compressor needs mechanical work that is Higher-grade energy is then taken directly from the engine crankshaft. Thus it ultimately reduces the brake power (B.P.) available and increasing brake specific fuel consumption.
The ‘vapour absorption refrigeration system ‘utilizes the waste heat as it does not involve any compressor and hence not require great mechanical work instead of that it works directly on the heat energy i.e. .low grade energy.
Thus by making proper use of lost heat (about 60 –70% of total heat). The conventional air conditioning can be replaced with this system and the same effect can be experienced. The common vapour absorption refrigeration systems, which are in practice, are
1. Aqua Ammonia system and
2. Lithium Bromide water system
ENVIRONMENTAL FRIENDLY REFRIGERATION &
AIR CONDITIONING SYSTEM
SUBJECT:
AUTOMOBILE A/C BY UTILISING
WASTE HEAT & GASES
PRESENTED BY:
MS. KIRAN G. HORE
MS JYOTI S. KOTECHA
(MECHANICAL ENGINEERING)
ABSTRACT
It is the established fact that only about 30% of heat supplied by the fuel is converted into useful work, in case of internal combustion (I.C) engines and the rest is going waste to the atmosphere in the form of coolant losses (35%) and exhaust gas losses (35%). The conventional air conditioning system which most of the A/C vehicles use is the ‘vapour Compression refrigeration system ‘, in which the compressor needs mechanical work that is Higher-grade energy is then taken directly from the engine crankshaft. Thus it ultimately reduces the brake power (B.P.) available and increasing brake specific fuel consumption.
The ‘vapour absorption refrigeration system ‘utilizes the waste heat as it does not involve any compressor and hence not require great mechanical work instead of that it works directly on the heat energy i.e. .low grade energy.
Thus by making proper use of lost heat (about 60 –70% of total heat). The conventional air conditioning can be replaced with this system and the same effect can be experienced. The common vapour absorption refrigeration systems, which are in practice, are
1. Aqua Ammonia system and
2. Lithium Bromide water system
