Aroace Chiller/Heaters Units’ Operating Principle

Aroace Units’ Operating Principle (Cooling Cycle)
High-Temperature Generator - The gas burner heats the dilute lithium bromide and water solution contained in the high-temperature generator and the boiling process propels the refrigerant vapour, which is rich in droplets of medium-concentration lithium bromide solution, into the main separator.
The lithium bromide solution is collected and precooled, by being passed through a heat exchanger, prior to being fed into the low-temperature generator.

Low-Temperature Generator - The hot refrigerant vapour discharged by the separator reheats (dual effect) the medium-concentration lithium bromide solution in the low-temperature generator.  The refrigerant vapour then moves on to the condenser, while the concentrated lithium bromide solution thus obtained is also precooled by the heat exchanger prior to moving on to the absorber.

Condenser - The refrigerant vapour reaches the condenser, where it condenses on the surfaces of the chilling circuit coils.  The condensation heat is removed by the cooling water and exhausted through the evaporation tower.  The refrigerant liquid collected in the condenser is then fed into the evaporator.

Evaporator - The influence exerted by the absorber makes the pressure inside the evaporator substantially lower than the generator and condenser pressure.  Once inside the evaporator, the refrigerant liquid thus boils and absorbs heat, evaporating on the surface of the coil in the circuit containing the water to be chilled.  The refrigerant vapour thus obtained then flows into the absorber.

Absorber - The low pressure in the absorber is due to the chemical affinity between the concentrated lithium bromide solution supplied by the separator and the refrigeration vapour that forms in the evaporator.  The refrigerant vapour is absorbed by the concentrated lithium bromide solution as the latter bathes the surface of the absorber coil.
The condensation and dilution heat is drawn off by the cooling water.
The dilute lithium bromide solution is then preheated in the heat exchanger prior to being returned to the generator.


Aroace Units’ Operating Principle (Heating Cycle)
High-Temperature Generator - The solution boils in the generator, and the vapour and concentrated lithium bromide solution are driven towards the separator, as is the case in the chilling cycle.

Evaporator - As no water circulates in the cooling circuit, the vapour generated passes straight to the evaporator, where it condenses on the coil in the circuit containing the water to be heated.  The condensation heat generated is drawn off by the water circulating in the coil.

Absorber - The concentrated lithium bromide solution supplied by the separator mixes with the liquid from the evaporator and dilutes prior to returning to the generator.

	Gas fired chiller/heaters
	Advantages Held Out by Aroace Chiller/Heaters Units Aroace Chiller/Heaters Units Features Units’ Operating Principle Products Technical specifications .pdf 38 kb

Gas Fired Double Effect Operating Principle (Cooling Cycle)

Gas Fired Double Effect Operating Principle (Heating Cycle)