Almost every process evolve heat as a by product which is in between temperatures of 40 -70 degree C. But this heat is not useful and produce green house effect. Even the heat available from solar system also lies between 40 - 70 degree C if we use good solar panels. But its usage is limited. so we need a system which can increase this heat to 110 degree C or more which can be useful in evaporation of water or as heat pump in winters or as water heater with high flow rate.
The conventional system using electric heat which require high amount of high grade energy to raise the temperature, which again increase the green house effect and also very costly. So to avoid the usage of high grade energy, vapor absorption system is best alternative. It does not require high grade energy and so its running cost is negligible.
Vapor absorption have mainly five heat exchangers 1) Absorber 2) Generator 3) Condenser 4)Evaporator 5) Solution heat exchanger.
Vapor absorption system(VAS) is different from vapor compression (VCS) system in working. In VCS the condenser is at high pressure but in VAS condenser and generator is at low pressure. In VAS ther are two pumps which raise the pressure of liquid refrigerant(As it is easy to raise the pressure of liquid in comparison with vapor and require negligible energy).
Waste heat from waste heat source is circulated using water as medium in evaporator. In evaporator, water is heated and water vapor is entered in Absorber where LiBr is working as absorber and absorb the water vapor. So high concentration high pressure lithium bromide become low concentrated LiBr-water mixture. This process is exothermic and release an enormous amount of eenrgy which increase the absorber temperature from 70 to 120 degree C.
The low concentration soultion from absorber moves towards the generator through an expansion valve which reduce the pressure of mixture from absorber to generator pressure.
A solution heat exchanger is used in between the absorber and generator to increase the efficiency of system. The low concentrated mixture of LiBr-water is heated in generator, where water is convertyed in vapor and enter in the condneser where as the rest mixture in generator become rich in LiBr and sent back to Absorber for further absorption of water vapor coming from evaporator.
The water vapor in condenser is cooled by ambient air and converted into liquid and this liquid is sent to evaporator thrfough a liquid pump mounted between condenser and evaporator, because it is easy So with the negligible amount of energy needed to run, this system is eco friendly and can be viable option for sustainable development of world.
The waste heat source may be from industry exhaust or from kitchen exhaust.
For More details:
https://www.linkedin.com/in/navneet-rohilla-367b69109/detail/treasury/education:326899477/?entityUrn=urn%3Ali%3Afs_treasuryMedia%3A(ACoAABtm-L8BI1_RqojA7LDbsJCaZ2A6ESpx7vc%2C51032761
The conventional system using electric heat which require high amount of high grade energy to raise the temperature, which again increase the green house effect and also very costly. So to avoid the usage of high grade energy, vapor absorption system is best alternative. It does not require high grade energy and so its running cost is negligible.
Vapor absorption have mainly five heat exchangers 1) Absorber 2) Generator 3) Condenser 4)Evaporator 5) Solution heat exchanger.
Waste heat from waste heat source is circulated using water as medium in evaporator. In evaporator, water is heated and water vapor is entered in Absorber where LiBr is working as absorber and absorb the water vapor. So high concentration high pressure lithium bromide become low concentrated LiBr-water mixture. This process is exothermic and release an enormous amount of eenrgy which increase the absorber temperature from 70 to 120 degree C.
The low concentration soultion from absorber moves towards the generator through an expansion valve which reduce the pressure of mixture from absorber to generator pressure.
A solution heat exchanger is used in between the absorber and generator to increase the efficiency of system. The low concentrated mixture of LiBr-water is heated in generator, where water is convertyed in vapor and enter in the condneser where as the rest mixture in generator become rich in LiBr and sent back to Absorber for further absorption of water vapor coming from evaporator.
The water vapor in condenser is cooled by ambient air and converted into liquid and this liquid is sent to evaporator thrfough a liquid pump mounted between condenser and evaporator, because it is easy So with the negligible amount of energy needed to run, this system is eco friendly and can be viable option for sustainable development of world.
The waste heat source may be from industry exhaust or from kitchen exhaust.
For More details:
https://www.linkedin.com/in/navneet-rohilla-367b69109/detail/treasury/education:326899477/?entityUrn=urn%3Ali%3Afs_treasuryMedia%3A(ACoAABtm-L8BI1_RqojA7LDbsJCaZ2A6ESpx7vc%2C51032761
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ReplyDeleteIf we are talikng about heat pumps all heat pumps are used for special purpose. sunstellar provides best < a href="https://sunstellar.in/blogs/air-source-heat-pump/">air source heat pump in India.
ReplyDeleteGreat to know and thanks for support sir
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