System and method of controlling a heat transfer system

Patent metadata

Field	Value
Publication number	US-11668488-B2
Application number	US-202017017945-A
Country	US
Kind code	B2
Filing date	Sep 11, 2020
Priority date	Sep 11, 2020
Publication date	Jun 6, 2023
Grant date	Jun 6, 2023

Abstract

System and methods for controlling operating state of a heat transfer system are disclosed herein. The heat transfer system can include temperature sensor positioned at the fluid inlet line and the fluid outlet line and a heat exchanger between the fluid inlet line and the fluid outlet line. The heat transfer system can include a processor communicatively coupled to the first temperature sensor and the second temperature sensor. The processor can determine an inlet temperature of water flowing in the fluid inlet line and outlet temperature of water flowing in the fluid outlet line and can determine a delta temperature based on difference between the inlet temperature and the outlet temperature. Based on the inlet temperature and the delta temperature, the processor can determine an operating state of the heat transfer system.

First claim

What is claimed is:

1. A heat transfer system comprising:
a fluid inlet line;
a first temperature sensor configured to detect a temperature of fluid within the fluid inlet line;
a fluid outlet line;
a second temperature sensor configured to detect a temperature of fluid within the fluid outlet line;
a heat exchanger operatively disposed between the fluid inlet line and the fluid outlet line; and
a processor configured to:
obtain an inlet temperature from the first temperature sensor;
obtain an outlet temperature from the second temperature sensor;
determine a delta temperature based on difference between the inlet temperature and the outlet temperature;
determine a current operating state of the heat transfer system based on the inlet temperature and the delta temperature, the current operating state being a scaling operating state or a condensation operating state; and
output operating instructions to cause the heat transfer system to transition from the current operating state to a target operating state,

wherein when the delta temperature is greater than or equal to a first threshold value, the heat transfer system is in the scaling operating state,
wherein when the delta temperature is less than or equal to a second threshold value that is less than the first threshold value, the heat transfer system is the condensation operating state, and
wherein when the delta temperature is between the first threshold value and the second threshold value, the heat transfer system is in the target operating state.

2. The heat transfer system of claim 1 , wherein the operating instructions comprise:
instructions for adjusting a flow of fluid through the heat transfer system; and/or
adjusting a heat output of the heat exchanger.

3. The heat transfer system of claim 1 , wherein if the current operating state is the scaling operating state, the operating instructions comprise instructions for adjusting a fluid flow into the heat exchanger such that the delta temperature decreases to become less than or equal to the first threshold value.

4. The heat transfer system of claim 1 , wherein if the current operating state is the condensation operating state, the operating instructions comprise instructions for adjusting a fluid flow into the heat exchanger such that the delta temperature increases to become greater than or equal to the second threshold value.

5. The heat transfer system of claim 1 , wherein if the current operating state is the scaling operating state or the condensation operating state, the operating instructions comprise instructions for at least one of: turning off the heat transfer system, displaying a notification on a display associated with the heat transfer system, sending a notification to an electronic device, and activating an alarm of the heat transfer system.

6. The heat transfer system of claim 1 , wherein the processor is further configured to determine, based at least in part on the inlet temperature and the delta temperature, a fluid-flow rate into the heat exchanger to maintain the heat transfer system in the target operating state.

7. A method of controlling a heat transfer system comprising:
obtaining, by a processor, operating parameters for a heat exchanger;
processing, by the processor, the operating parameters to determine a plurality of operating states for the heat exchanger, the plurality of operating states comprising a target operating state and at least one of a scaling operating state and a condensation operating state;
obtaining, by the processor, an inlet temperature corresponding to a fluid inlet line;
obtaining, by the processor, an outlet temperature corresponding to a fluid outlet line;
determining, by the processor, a delta temperature based on a difference between the inlet temperature and the outlet temperature;
determining, by the processor and based at least in part on the inlet temperature and the delta temperature, a current operating state of the heat exchanger, the current operating state being one of the plurality of operating states;
determining, by the processor, a fluid-flow rate into the heat exchanger to maintain the heat exchanger in the target operating state; and
if the current operating state is not the target operating state, outputting operating instructions to cause the heat exchanger to transition to the target operating state,
wherein when the delta temperature is greater than or equal to a first threshold value, the heat exchanger is in the scaling operating state,
wherein when the delta temperature is less than or equal to a second threshold value, the heat exchanger is in the condensation operating state, and
wherein when the delta temperature is between the first threshold value and the second threshold value, the heat exchanger is in the target operating state.

8. The method of claim 7 , wherein if the current operating state is the scaling operating state, the operating instructions comprise instructions for adjusting a fluid flow into the heat exchanger such that the delta temperature decreases to become less than or equal to the first threshold value.

9. The method of claim 7 , wherein if the current operating state is the condensation operating state, the operating instructions comprise instructions for adjusting a fluid flow into the heat exchanger such that the delta temperature increases to become greater than or equal to the second threshold value.

10. The method of claim 7 , wherein if the current operating state is the scaling state or the condensation state, the operating instructions comprise instructions for at least one of: turning off the heat transfer system, displaying a notification on a display associated with the heat transfer system, sending a notification to an electronic device, and activating an alarm of the heat transfer system.

11. A non-transitory computer-readable medium having instructions stored thereon that, when executed by a processor, cause the processor to perform operations comprising:
obtaining an inlet temperature corresponding to a fluid inlet line;
obtaining an outlet temperature corresponding to a fluid outlet line;
determining a delta temperature based on difference between the inlet temperature and the outlet temperature;
determining, based at least in part on the inlet temperature and the delta temperature, a current operating state of a heat exchanger, the current operating state being one of a plurality of operating states comprising a target operating state and at least one of a scaling operating state and a condensation operating state;
if the current operating state is not the target operating state, outputting operating instructions to cause the heat exchanger to transition to the target operating state;
obtaining operating parameters for the heat exchanger; and
processing the operating parameters to determine the plurality of operating states;
wherein when the delta temperature is greater than or equal to a first threshold value, the heat exchanger is in the scaling operating state,
wherein when the delta temperature is less than or equal to a second threshold value, the heat exchanger is in the condensation operating state, and
wherein when the delta temperature is between the first threshold value and the second threshold value, the heat exchanger is in the target operating state.

12. The non-transitory computer-readable medium according to claim 11 , wherein if the current operating state is the scaling operating state, the operating instructions comprise instructions for adjusting a fluid flow into the heat exchanger such that the delta temperature decreases to become less than or equal to the first threshold value.

Assignees

• Rheem Mfg Co

Inventors

• Revilla Jorge Miguel Gamboa
• Gullapalli Satya Kiran
• Salazar Sergio Fernando Montalgo
• Montanez Juan Carlos
• Monfared Amin
• Chow Alexander

Classifications

• F24H15/215

  before heating · CPC title

• F24H1/145 Primary

  using fluid fuel · CPC title

• F24H15/395

  Information to users, e.g. alarms · CPC title

• F24H15/219

  after heating · CPC title

• F24H15/175

  where the difference between the measured temperature and a set temperature is kept under a predetermined value · CPC title