The purpose of pulling a high vacuum on a refrigeration system is to verify that the system has no external leaks and to ensure that no moisture is trapped in the system. It is not uncommon to leave the vac test for 24 hours, a very slight loss of vacuum during this period can be attributed to...
chicopee Modern Refrigeration and Air-con." Althouse Turnquist and Bracciano" Defines HoC as Mechanical energy of pressure, transformed into energy of heat.
My query is the principle of NH3 being used to compress R600a and the fact that as the NH3 expands (loses energy) while the R600a is...
In a conventional refrigeration system theoretically the heat of compression is the energy required for compression.
When compressed gasses are expanded then energy is released and its temperature drops.
see attachment
Einstein's refrigeration system uses Ammonia vapour to drive and...
Aquafied
While charging Ammonia into water the mixture becomes extremely hot, indicating a chemical action is occurring. To liberate this quantity of Ammonia from the mixture heat is required so if no heat is gained or lost (externally) during the absorption or liberation process is the energy...
In an adiabatic situation is the heat required to liberate all the ammonia vapour from a given mass of water, exactly the same as the energy gain when the same mass of vapour is re-absorbed, in other words is more energy needed to brake the bondage?
25362 One more question. During the generation cycle is the Hydrogen pushed back to the evaporator or does it remain as a partial pressure on the condenser side and do you know where I can get technical info on this? My colleague is adamant that it does and none of my text books discuss this point.
Compositepro My obsession is a result of my need to convince my project partner that Hydrogen and NH3 are distributed evenly throughout the system before the liquid trap is established between the condenser and evaporator. Liberated NH3 vapour from bubble pump drives all the Hydrogen to the...
25362 (Chemical) In your third posting you suggested “there is no gas stratification effect” After much deliberation I can't believe that stratification doesn't occur in the "balance drum" otherwise Dalton's Law would be applicable and Hydrogen and Ammonia would be distributed equally...
Compositepro I can't find info on dynamic process creating "stratification" within a mixed gas environment, can you advise a site for further reference please?
25362 (Chemical) CompositeprThank you "25362" (Chemical) and "Compositepro" (Chemical). I believe you are correct about the function of the “balance drum” or “Hydrogen reserve vessel “ but my problem is why it functions. According my interpretation of Dalton's Law when two or more gasses are...
Correction to my last post. I meant Dalton's law of partial pressures [individual gasses act as if they occupy the space alone]. The Ammonia and Hydrogen in the reserve vessel must be stratified so that Hydrogen only is forced into the evaporator. Thank you to all my contributors...
The Hydrogen reserve vessel (connect to the top of the condenser and evaporator) in an absorption refrigeration system is designed to raise the Hydrogen pressure in the evaporator to neutralise the increase in Ammonia condensing pressure as the ambient temperature rises. Obviously the Hydrogen...
An article written by a Professor Bassam (University of Wisconsin) stated that a substantial fraction of ammonia dissolved in water remains in the molecular form in solution. I have learned from other sources that, at any temperature and pressures we have in a system, the vapour above the NH4OH...
Is the vapour given off during the generation cycle of an absorption refrigeration system basically pure Ammonia and does the Ammonia conform to the the saturation/pressure charts on the high temperature side and low temperature side of these systems?
