Title:
吸収冷却機のための改良されたコントロール
Document Type and Number:
Japanese Patent JP3874808
Kind Code:
B2
Abstract:
In a first embodiment, an absorption chiller including a generator (26) and an absorber (24) is provided, with at least one stream of concentrated absorbent solution flowing from the generator (26) to the absorber (24). Separate flows of the concentrated absorbent solution are delivered to the surface contact portion (24a) of the absorber (24) and to a reservoir (24c), which may be the absorber sump. The chiller capacity is controlled by varying the flow rate ratio of absorbent solution flowing to the surface contact portion (24a) of the absorber (24) versus the reservoir. A controller (118) adjusts the flow ratio of absorbent solution to achieve the desired refrigeration capacity. In a second embodiment, a crystallization detection and recovery method for a two-stage absorption refrigeration machine (400) is provided. Crystallization in the low temperature heat exchanger (426) is detected through temperature comparisons between certain absorbent solution flows. The recovery sequence includes steps to remove crystallization and to prevent subsequent occurrences. Finally, in a third embodiment, a control system (500) for controlling overshoot in response to a setpoint input (515) to the control system (500) is provided. The control system (500) includes a feedback loop (505) connected to the control system (500) via a summing node (508); and a binomial filter (310) arranged to receive a setpoint input (515) and to provide a filtered setpoint output (520) to the control system (500) via the summing node (508). The control system includes the binomial filter (510) to provide a filtered setpoint output (520) having a gradual initial response to the control system via the summing node (508). A method of controlling a water chiller system using the control system (500) to provide a supply of leaving water at a preselected temperature is also provided.
Inventors:
Lee, Civic
Mark, budget
Mark, budget
Application Number:
JP54591398A
Publication Date:
January 31, 2007
Filing Date:
March 23, 1998
Export Citation:
Assignee:
GAS TECHNOLOGY INSTITUTE
International Classes:
F25B15/00; F25B15/06; F25B49/04; G05B5/01
Domestic Patent References:
| JP59093157A |
Foreign References:
| US3122002 | ||||
| US3613390 | ||||
| US3054272 | ||||
| US4665709 | ||||
| US2775097 | ||||
| US3279203 | ||||
| US4269041 | ||||
| US3831390 | ||||
| GB434108A | ||||
| US5259202 | ||||
| US4534180 | ||||
| US5592825 | ||||
| US5636526 | ||||
| US5586447 | ||||
| US5440270 | ||||
| US5195028 | ||||
| US4487028 | ||||
| US5694077 |
Other References:
Bong Wie et al,”Comparison Between Robustified Feedforward and Feedback for Achieving Parameter Robustness”, Journal of Guidance, Control and Dynamics, 米国,American Inst. of Aeronautics and Astronautics, 1992年 7月,Vol.15 No.4, p935-943
Attorney, Agent or Firm:
Kenji Yoshitake
Hiroyuki Nagai
Junpei Okada
Hirohito Katsunuma
Hiroyuki Nagai
Junpei Okada
Hirohito Katsunuma