Dilution cycle for absorption chiller
AssigneeCarrier Corporation
InventorDarren S. Sheehan
Life of this patent
Estimating the term…
Abstract
A routine of controlling the dilution cycle of an absorption chiller to determine when to initiate a dilution cycle, continue the cycle and terminate the cycle. The concentration of solution leaving the chiller's low temperature generator is calculated and the crystallization temperature of the solution is then determined. The crystallization temperature is compared to the ambient temperature and the result is used to determine whether to institute a dilution cycle, continue the cycle or terminate the cycle.
Claims7
A dilution control routine for determining whether a dilution cycle should be initiated, continued or terminated upon the shutting down of an absorption chiller system, said routine including the steps of:
- a) calculating the concentration of solution being returned to the system absorber at the time of shut down,
- b) initiating or continuing the chiller's dilution cycle in the event the calculated solution concentration is above a predetermined concentration level,
- c) calculating the crystallization temperature of the solution being returned to the absorber,
- d) measuring the temperature of the solution being returned to the absorber,
- e) measuring the ambient temperature in the vicinity of the chiller,
- f) calculating the difference between the two measured temperatures,
- g) continuing the dilution cycle in the event the temperature difference is below a given temperature value, and
- h) terminating the dilution cycle in the event the temperature difference is above a given temperature value.
Dependencies are inferred from the claim text.