Integrated ventilation cooling system

• US 7,398,821 B2
• Filed: 03/12/2001
• Issued: 07/15/2008
• Est. Priority Date: 03/12/2001
• Status: Expired due to Term

• Current Assignee: NightBreeze Corp.
• Original Assignee: Davis Energy Group (GTI Energy)
• Inventors: Rainer, Leo I., Springer, David A.
• Primary Examiner(s): Ciric; Ljiljana (Lil) V
• Application Number:
  US09/802,883
• Publication Number:
  US 20020124992A1
• Time in Patent Office: 2,682 Days
• Field of Search: 165/11.1, 165/50, 165/57, 165/221, 165/244, 165/247, 165/291, 165/248, 454/258, 236/13, 236/49
• US Class Current: 165/247
• CPC Class Codes: F24F 11/30 for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 11/62 characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
• CPC Class Codes: F24F 11/77 by controlling the speed of ventilators
• CPC Class Codes: F24F 2013/1473 with cams or levers
• CPC Class Codes: F24F 2130/00 Control inputs relating to environmental factors not covered by group F24F2110/00
• CPC Class Codes: F24F 2130/10 Weather information or forecasts
• CPC Class Codes: G05D 23/1931 to control the temperature of one space
• CPC Class Codes: Y02B 30/70 Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

A system and method for cooling and heating of buildings comprising an integrated assembly of devices, including a variable speed air handler, hot water heating coil, outside air damper, controller, and optional compressor-based air conditioner. During the summer the system utilizes nighttime outside air for cooling and uses air temperature predictions to provide information about optimal control settings and to maintain comfort. During the winter the system varies airflow with heating demand and ventilates with outside air to maintain indoor air quality.

Claims

1. A system for using outside ventilation air to maintain indoor comfort and air quality, comprising:

a sensor system for detecting outdoor and indoor air temperatures;

an air delivery system for delivering the outside ventilation air to an interior space; and

a programmable controller, operably connected to the sensor system and the air delivery system, that includes;

a recovery element that receives an outdoor air temperature and an indoor air temperature detected by the sensor system;

a storage element that stores the detected outdoor air temperature and the detected indoor air temperature detected by the sensor system;

a calculating element that automatically calculates a predicted indoor temperature range and a predicted outdoor temperature range based on the stored outdoor air temperature and the stored indoor air temperature; and

a regulating element that automatically regulates operation of the air delivery system as a function of predicted indoor and outdoor air temperature ranges and a predetermined indoor air temperature range.

2. The system of claim 1, further comprising a user interface that displays the predicted and predetermined indoor air temperature ranges and is operably connected to the controller.

3. The system of claim 2, wherein the controller regulates an airflow rate based on the desired indoor air temperature range.

4. The system of claim 1, further comprising a communication link connected to the controller for connection to an outside data source.

5. The system of claim 4, wherein the communication link obtains a weather prediction.

6. The system of claim 4, wherein the controller regulates operation of the air delivery system based on information received from the outside data source over the communication link.

7. The system of claim 1, wherein the controller regulates an indoor air temperature at which cooling by the outside ventilation air is discontinued based on predicted temperatures.

8. The system of claim 1, wherein the controller regulates an airflow rate based on predicted temperatures.

9. The system of claim 1, wherein the controller controls an airflow rate of the outside ventilation air in proportion to a cooling demand.

10. The system of claim 1, wherein the controller controls the air quality by regulating a volume of the outside ventilation air delivered by the air delivery system.

11. The system of claim 1, wherein the air delivery system further comprises a vapor compression air conditioner operably connected to the controller, wherein the controller operates the vapor compression air conditioner during early morning hours to pre-cool a building.

12. The system of claim 1, wherein the controller activates the air delivery system when the outdoor air temperature is lower than the indoor air temperature.

13. The system of claim 1, wherein the air delivery system includes at least one of a vapor compression unit and an evaporative cooling unit to cool the outside ventilation air.

14. A method of maintaining indoor air comfort and air quality with a system having,

a sensor system for detecting outdoor and indoor air temperatures;

an air delivery system for delivering the outside ventilation air to an interior space; and

a programmable controller, operably connected to the sensor system and the air delivery system, that includes;

a recovery element that receives an outdoor air temperature and an indoor air temperature detected by the sensor system;

a storage element that stores the detected outdoor air temperature and the detected indoor air temperature detected by the sensor system;

a calculating element that automatically calculates a predicted indoor temperature range and a predicted outdoor temperature range based on the stored outdoor air temperature and the stored indoor air temperature; and

a regulating element that automatically regulates operation of the air delivery system as a function of predicted indoor and outdoor air temperature ranges and a predetermined indoor air temperature range, the method comprising;

detecting an outdoor air temperature and an indoor air temperature;

storing the detected outdoor air temperature and the detected indoor air temperature;

calculating a predicted indoor temperature range and a predicted outdoor temperature range based on the stored outdoor air temperature and the stored indoor air temperature; and

regulating operation of an air delivery system to deliver outside ventilation air into an interior space as a function of the predicted indoor and outdoor air temperature ranges and the predetermined indoor air temperature range.

15. The method of claim 14, further comprising inputting a desired indoor air temperature through a user interface.

16. The method of claim 14, further comprising connecting the controller to an outside data source via a communication link.

17. The method of claim 16, further comprising obtaining a weather prediction via the communication link.

18. The method of claim 14, further comprising regulating an indoor air temperature by controlling movement of outside ventilation air based on predicted temperatures.

19. The method of claim 14, further comprising activating at least one of a vapor compression unit and an evaporative cooling unit to cool outside ventilation air.

20. The method of claim 14, further comprising activating the air delivery system when the outdoor air temperature is lower than the indoor air temperature.