Systems and methods for preventing excessive cascade boiler system heating overshoot

Patent metadata

Field	Value
Publication number	US-11747012-B2
Application number	US-202218092221-A
Country	US
Kind code	B2
Filing date	Dec 31, 2022
Priority date	Oct 19, 2020
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

The disclosed technology includes a controller configured to control an output of one or more boilers to reduce temperature overshoot of the boiler system. The controller can receive temperature data, a threshold temperature value, and a maximum temperature value, and determine whether the temperature of the water in the boiler system is greater than or equal to a threshold temperature. The controller can also determine a number of operating boilers that were operating when the threshold temperature was reached and determine a temperature increment value based on the threshold temperature, the maximum temperature, and the number of operating boilers. The controller can output a control signal to a boiler to reduce an output of the boiler based on the temperature increment value and the temperature data to reduce overshoot of the boiler system.

First claim

That which is claimed is:

1. A non-transitory, computer-readable medium storing instructions that, when executed by one or more processors, cause a controller associated with a boiler system to:
receive a threshold temperature and a maximum temperature;
receive, from a temperature sensor of the boiler system, temperature data indicative of a temperature of water in the boiler system;
receive boiler data from one or more boilers of a plurality of boilers, the boiler data being indicative of an individual capacity corresponding to each boiler of the one or more boilers;
determine, based on the temperature data, if the temperature of the water in the boiler system is less than or equal to the threshold temperature;
in response to determining that the temperature of the water in the boiler system is less than or equal to the threshold temperature, output a control signal to a boiler of the plurality of boilers to heat the water in the boiler system;
determine, based on the temperature data and the boiler data, a rate of temperature change of the temperature of the water in the boiler system;
determine, based on the rate of temperature change, a predicted amount of time for the temperature of the water in the boiler system to reach the threshold temperature; and
in response to determining the predicted amount of time for the temperature of the water in the boiler system to reach the threshold temperature, output a control signal to the boiler of the plurality of boilers to control an output of the boiler.

2. The non-transitory, computer-readable medium of claim 1 , wherein outputting a control signal to the boiler of the one or more boilers to control an output of the boiler comprises outputting a control signal for the boiler to operate in a standby mode to prevent the boiler from providing heat to the water in the boiler system.

3. The non-transitory, computer-readable medium of claim 1 , wherein outputting a control signal to the boiler of the one or more boilers to control an output of the boiler comprises outputting a control signal for the boiler to modulate an output of the boiler to a lower individual capacity to reduce the amount of heat the boiler is adding to the water in the boiler system.

4. The non-transitory, computer-readable medium of claim 1 , wherein the instructions, when executed by one or more processors, further cause the controller to:
receive historical system data associated with the boiler system,
wherein determining the rate of temperature change of the temperature of the water in the boiler system is further based on based on the historical system data.

5. The non-transitory, computer-readable medium of claim 1 , wherein the plurality of boilers comprises at least one condensing boiler and one non-condensing boiler.

6. A cascade boiler system comprising:
the non-transitory, computer-readable medium according to claim 1 ;
one or more processors configured to execute the instructions stored on the non-transitory, computer-readable medium;
one or more controllers in operable communication with the processors; and
a plurality of boilers operatively coupled to the one or more controllers.

7. The cascade boiler system of claim 6 , wherein the plurality of boilers comprises at least one condensing boiler and one non-condensing boiler.

8. The cascade boiler system of claim 6 , which is configured to output a control signal to a boiler of the plurality of boilers to modulate an output of the boiler to a lower individual capacity to reduce the amount of heat the boiler is adding to the water in the boiler system.

9. The cascade boiler system of claim 6 , which is configured to output a control signal to a boiler of the plurality of boilers to operate in a standby mode to prevent the boiler from providing heat to the water in the boiler system.

10. The cascade boiler system of claim 6 , further comprising one or more temperature sensors, wherein the controller is configured to receive, from at least one of the one or more temperature sensors, temperature data indicative of a temperature of water in the boiler system.

Assignees

• Rheem Mfg Co

Inventors

• Carrasco Hiram Osuna
• Gamboa Revilla Jorge Miguel

Classifications

• F22B35/18 Primary

  Applications of computers to steam-boiler control · CPC title

• F22B35/008

  Control systems for two or more steam generators (automatic water-feed control for a number of steam boilers designed for different ranges of temperature and pressure F22D5/36) · CPC title

• G05B19/4155

  characterised by program execution, i.e. part program or machine function execution, e.g. selection of a program · CPC title

• G05B2219/50333

  Temperature · CPC title

• G05D23/193 Primary

  sensing the temperaure in different places in thermal relationship with one or more spaces · CPC title