GB913558A - - Google Patents
Info
- Publication number
- GB913558A GB913558A GB913558DA GB913558A GB 913558 A GB913558 A GB 913558A GB 913558D A GB913558D A GB 913558DA GB 913558 A GB913558 A GB 913558A
- Authority
- GB
- United Kingdom
- Prior art keywords
- temperature
- signal
- heat
- valve
- mean
- 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.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
- F22B35/06—Control systems for steam boilers for steam boilers of forced-flow type
- F22B35/10—Control systems for steam boilers for steam boilers of forced-flow type of once-through type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
- F22B35/06—Control systems for steam boilers for steam boilers of forced-flow type
- F22B35/10—Control systems for steam boilers for steam boilers of forced-flow type of once-through type
- F22B35/102—Control systems for steam boilers for steam boilers of forced-flow type of once-through type operating with fixed point of final state of complete evaporation, e.g. in a steam-water separator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/185—Control of temperature with auxiliary non-electric power
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
- G05D23/1909—Control of temperature characterised by the use of electric means using an analogue comparing device whose output amplitude can only take two discrete values
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- General Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Power Engineering (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Control Of Temperature (AREA)
Abstract
913,558. Fluid-pressure servomotor-control systems. SULZER FRERES S.A. Feb. 1, 1960 [Feb. 2, 1959], No. 3455/60. Class 135. A heat-exchanger is equipped with a number of local temperature signal initiators which are associated with individual places on the heatexchange surface, a means signal initiator which produces a signal representing a mean temperature of the heat-exchange surface and means for controlling the temperature of the heat-exchange surface, and in which the mean signal initiator and the local temperature signal initiator representing the highest temperature can both act on the means for controlling the temperature of the heat-exchange surface, the arrangement being such that the local signal initiator representing the highest temperature is kept inoperative as long as the maximum local temperature remains below a predetermined critical value. In the embodiment shown, steam flows from an inlet 1 through the tubes of 3a, 3b, 3c, 3d to an outlet header 4 and pipe 5. The steam temperature in the outlet pipe 5, which is representative of the mean temperature of the heat-exchange surfaces, is measured by a measuring bar 8 which acts through a lever 9 to position a control valve 11 which controls the supply and exhaust of fluid to a piston power device 16 loaded by a spring 17. Movement of the power device acts through rod 19 and lever 23 to position a valve 7 controlling the feed of water into the inlet pipe 1. Local temperature signal initiator 25, 26, 27, 28 control servomotors 33, 34, 35, 36 in a similar manner but the spring loading of these motors is greater than that for the motor 16 so that the motor controlled by the highest local temperature is only effective to adjust the valve 7 when this temperature exceeds the mean temperature by a predetermined amount. In a modification, an adjustable loading signal may be provided to set the predetermined amount. In a further modification the mean temperature signal controls a valve similar to the valve 7 while the maximum local temperature signal when effective, controls the fuel supply to a burner.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH6901459A CH365094A (en) | 1959-02-02 | 1959-02-02 | Heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB913558A true GB913558A (en) | 1900-01-01 |
Family
ID=4529166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB913558D Expired GB913558A (en) | 1959-02-02 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3126053A (en) |
| CH (1) | CH365094A (en) |
| DE (1) | DE1097459B (en) |
| FR (1) | FR1245988A (en) |
| GB (1) | GB913558A (en) |
| NL (2) | NL129713C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE639975A (en) * | 1962-11-15 | |||
| JPS517301A (en) * | 1974-07-08 | 1976-01-21 | Hitachi Ltd | Jokihatsuseikino ondoseigyosochi |
| CH579759A5 (en) * | 1974-12-12 | 1976-09-15 | Bbc Brown Boveri & Cie | |
| US4356863A (en) * | 1980-09-08 | 1982-11-02 | Phillips Petroleum Company | Temperature control for preheating a crude oil feedstock |
| US4526136A (en) * | 1984-05-29 | 1985-07-02 | The United States Of America As Represented By The United States Department Of Energy | Control system for fluid heated steam generator |
| DE102010040029A1 (en) * | 2010-08-31 | 2012-03-01 | Behr Gmbh & Co. Kg | Method for operating thermally cycled component, involves heating component by supply of hot flow medium, where heating is limited only by predetermined thermomechanical reference value |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB257593A (en) * | 1925-08-28 | 1926-11-04 | Siemens Schuckertwerke Gmbh | Means for maintaining uniform temperature conditions in parallel pipes traversed by liquid or gaseous mediums |
| US1928010A (en) * | 1931-02-07 | 1933-09-26 | Sulzer Ag | Water tube steam generator |
| DE603602C (en) * | 1931-02-18 | 1934-10-04 | Sulzer Akt Ges Geb | Steam generator with regulation of the amount of working fluid |
| US1922220A (en) * | 1931-07-01 | 1933-08-15 | Etta Grant Sprague | Heating and ventilating apparatus |
| US2697587A (en) * | 1951-04-16 | 1954-12-21 | Fluor Corp | Controlled temperature fan cooled heat exchanger |
| BE510325A (en) * | 1951-04-17 | |||
| US2800887A (en) * | 1953-02-18 | 1957-07-30 | Sulzer Ag | Control system for forced flow vapor generators |
| US2806674A (en) * | 1954-09-02 | 1957-09-17 | Westinghouse Electric Corp | Heat pumps |
-
0
- NL NL237451D patent/NL237451A/xx unknown
- US US3126053D patent/US3126053A/en not_active Expired - Lifetime
- GB GB913558D patent/GB913558A/en not_active Expired
- NL NL129713D patent/NL129713C/xx active
-
1959
- 1959-02-02 CH CH6901459A patent/CH365094A/en unknown
- 1959-02-16 DE DES61782A patent/DE1097459B/en active Pending
-
1960
- 1960-01-22 FR FR816462A patent/FR1245988A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3126053A (en) | 1964-03-24 |
| FR1245988A (en) | 1960-11-10 |
| NL237451A (en) | 1900-01-01 |
| NL129713C (en) | 1900-01-01 |
| CH365094A (en) | 1962-10-31 |
| DE1097459B (en) | 1961-01-19 |
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