Patent US4089666A successfully refreshed from Google Patents.
US4089666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for control of air relative humidity with reduced energy usage
Assignee: Philip Morris USA Inc
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Filing: 1976-06-25
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Granted: 1978-05-16
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Expires: 1996-06-25
Abstract
Abstract A method for precisely controlling air dry bulb temperature and relative humidity in which the dry bulb temperature is sensed so that variations therefrom produced by cooling of the air in a spray water curtain are used to control the spray water curtain heat exchange area. Additionally, the dew point temperature is sensed and used for controlling the temperature of the spray water and hence the relative humidity in the air at a desired dry bulb temperature.
Inventors
- 👤 Jack B. Knight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:41
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F6/00; F24F6/12; F24F6/14; F24F2006/146
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
219 words
A method for reestablishing desired predetermined dry bulb temperature and relative humidity values in a spent air conditioning flow stream which has been subjected to a use resulting in addition or removal of sensible and/or latent heat to said flow stream, which method comprises passing the spent air through a water spray curtain maintained at a predetermined temperature relative to the dew point temperature of the spent air and disposed transversely of the direction of the air flow, said water spray curtain presenting an area of heat exchange confrontation to said flow, sensing the dry bulb temperature of the air downstream of the spray curtain and varying the spray curtain area responsive to variations of the sensed dry bulb temperature from said desired predetermined value thereby to correspondingly control the quantity of heat exchange effected to the air in said spray curtain, sensing the dew point temperature of the air downstream of the spray curtain and controlling the temperature of the water supplied to said spray curtain responsive to variations of the sensed dew point temperature from a predetermined value thereby to control the dew point temperature of the air at said predetermined value whereby the air leaving said spray curtain is at said desired relative humidity value, and returning the thus treated air to a point of use.
Claim 2
Independent Claim
219 words
A method for reestablishing desired predetermined dry bulb temperature and relative humidity values in a spent air conditioning flow stream which has been subjected to a use resulting in addition or removal of sensible and/or latent heat to said flow stream, which method comprises passing the spent air through a water spray curtain maintained at a predetermined temperature relative to the dew point temperature of the spent air and disposed transversely of the direction of the air flow, said water spray curtain presenting an area of heat exchange confrontation to said flow, sensing the dry bulb temperature of the air downstream of the spray curtain and varying the spray curtain area responsive to variations of the sensed dry bulb temperature from said desired predetermined value thereby to correspondingly control the quantity of heat exchange effected to the air in said spray curtain, sensing the dew point temperature of the air downstream of the spray curtain and controlling the temperature of the water supplied to said spray curtain responsive to variations of the sensed dew point temperature from a predetermined value thereby to control the dew point temperature of the air at said predetermined value whereby the air leaving said spray curtain is at said desired relative humidity value, and returning the thus treated air to a point of use.
Claim 3
Dependent Claim
35 words
The method of claim 1 in which the spray curtain area is varied responsive to variations of the sensed dry bulb temperature by varying the volumetric flow rate of water supplied to said spray curtain.
Claim 4
Dependent Claim
36 words
The method of claim 1 in which the air flow stream passing from the water spray curtain is subjected to a mixing operation to equilibrate the dry bulb temperature and relative humidity values throughout said stream.
References Cited (Backward Citations)
US1944146A
Cited
US1986529A
Cited
US2075036A
Cited
US2149990A
Cited
US3232029A
Cited
US3247679A
Cited
US3812685A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |