JPS55102002A - Operation instruction control unit for a plurality of units - Google Patents
Operation instruction control unit for a plurality of unitsInfo
- Publication number
- JPS55102002A JPS55102002A JP983479A JP983479A JPS55102002A JP S55102002 A JPS55102002 A JP S55102002A JP 983479 A JP983479 A JP 983479A JP 983479 A JP983479 A JP 983479A JP S55102002 A JPS55102002 A JP S55102002A
- Authority
- JP
- Japan
- Prior art keywords
- sets
- process variables
- section
- past
- tendency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
- Feedback Control In General (AREA)
Abstract
PURPOSE: To enable the control closer to reality even in the system greater in the variation of process variables, by determining the number of required operation sets taking into consideration the tendency in the change in the past process variables.
CONSTITUTION: Air conditioning load is calculated in a given equation based on the flow and water amount obtained from the sampling of measurement section 8, and operation is made based in the measurement value at present, weighting coefficient set and stored in advance in the set input section 12, and past process variables stored, the process variables this time can be calculated. The number of sets determining section 9 devides the process variables this time with the rated load per one set of chiller unit to determine the required number of sets of chiller unit 1. The instruction section 10 outputs instruction to operate with this number of sets of chiller units. With this constitution, the tendency in the change in the air conditioning load in the past is grasped as the process variables and the required number of sets are determined, allowing to perform control closest to actual state and the number of changes of running sets can be reduced.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP983479A JPS55102002A (en) | 1979-01-31 | 1979-01-31 | Operation instruction control unit for a plurality of units |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP983479A JPS55102002A (en) | 1979-01-31 | 1979-01-31 | Operation instruction control unit for a plurality of units |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55102002A true JPS55102002A (en) | 1980-08-04 |
Family
ID=11731149
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP983479A Pending JPS55102002A (en) | 1979-01-31 | 1979-01-31 | Operation instruction control unit for a plurality of units |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55102002A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58119003A (en) * | 1982-01-07 | 1983-07-15 | Nagano Keiki Seisakusho:Kk | Controller for number of devices in operation |
JPS59199021A (en) * | 1983-04-26 | 1984-11-12 | Mitsubishi Heavy Ind Ltd | Controlling method of wet lime-gypsum desulfurization plant |
JPS61224002A (en) * | 1985-03-29 | 1986-10-04 | Tokyo Gas Co Ltd | Controlling method for number of operated units of water cooling and warming machine |
JPH03182696A (en) * | 1989-12-12 | 1991-08-08 | Meidensha Corp | Number of pumps control device for variable speed pump |
US5289868A (en) * | 1991-04-10 | 1994-03-01 | Hitachi, Ltd. | Absorption chiller heater and unit-type air conditioning system |
WO1999017020A1 (en) * | 1997-09-29 | 1999-04-08 | Hitachi Construction Machinery Co., Ltd. | Torque control device for hydraulic pump of hydraulic construction equipment |
-
1979
- 1979-01-31 JP JP983479A patent/JPS55102002A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58119003A (en) * | 1982-01-07 | 1983-07-15 | Nagano Keiki Seisakusho:Kk | Controller for number of devices in operation |
JPS59199021A (en) * | 1983-04-26 | 1984-11-12 | Mitsubishi Heavy Ind Ltd | Controlling method of wet lime-gypsum desulfurization plant |
JPH0445205B2 (en) * | 1983-04-26 | 1992-07-24 | Mitsubishi Heavy Ind Ltd | |
JPS61224002A (en) * | 1985-03-29 | 1986-10-04 | Tokyo Gas Co Ltd | Controlling method for number of operated units of water cooling and warming machine |
JPH03182696A (en) * | 1989-12-12 | 1991-08-08 | Meidensha Corp | Number of pumps control device for variable speed pump |
US5289868A (en) * | 1991-04-10 | 1994-03-01 | Hitachi, Ltd. | Absorption chiller heater and unit-type air conditioning system |
WO1999017020A1 (en) * | 1997-09-29 | 1999-04-08 | Hitachi Construction Machinery Co., Ltd. | Torque control device for hydraulic pump of hydraulic construction equipment |
US6183210B1 (en) | 1997-09-29 | 2001-02-06 | Hitachi Construction Machinery Co. Ltd. | Torque control device for hydraulic pump in hydraulic construction equipment |
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