System and method for energy analysis and predictive modeling of components of a cooling system

• US 10,408,712 B2
• Filed: 03/11/2014
• Issued: 09/10/2019
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Vertiv Corporation (Vertiv Holdings Co.)
• Original Assignee: Vertiv Corporation (Vertiv Holdings Co.)
• Inventors: Voigt, Tyler
• Primary Examiner(s): Betsch, Regis J
• Assistant Examiner(s): Knox, Kaleria
• Application Number:
  US14/204,677
• Publication Number:
  US 20140278245A1
• Time in Patent Office: 2,009 Days
• Field of Search: 62177, 700300, 700278, 422187
• CPC Class Codes: F24F 11/46 Improving electric energy efficiency or saving
• CPC Class Codes: F24F 11/83 by controlling the supply of heat-exchange fluids to heat-exchangers
• CPC Class Codes: F24F 11/85 using variable-flow pumps
• CPC Class Codes: F28F 2200/00 Prediction; Simulation; Testing
• CPC Class Codes: F28F 27/003 specially adapted for cooling towers
• CPC Class Codes: G01M 99/005 Testing of complete machines, e.g. washing-machines or mobile phones testing of machine parts G01M13/00; testing of electric apparatus or components G01R31/50

Abstract

A method is disclosed for analyzing performance of a chilled water (CW) system having a plurality of CW components. The method may consider a collection of at least one of allowable operating points, allowable operating ranges or allowable operating conditions, for each one of the CW components. A user set or system measured ambient wet bulb (WB) temperature may be considered for an environment in which at least a subplurality of the CW components are located. Equivalent loop conditions may be calculated for each of the CW components covering a load being thermally managed by the CW system. For each one of the calculated equivalent loop conditions, a processor may generate information for balancing the CW components to meet load requirements, and then analyze and select a balance condition that yields the user preferable optimization.

Claims

1. A method for analyzing performance of a chilled water (CW) system having a plurality of CW components, the method comprising:

using a processor to analyze a collection of at least one of allowable operating points, allowable operating ranges or allowable operating conditions, for each one of the plurality of CW components of the CW system;

generating an electrical signal representative of at least one of a user set or system measured ambient wet bulb (WB) temperature for an environment in which at least a subplurality of the CW components are located;

using the processor to read the electrical signal and to analyze at least one of the user set or system measured ambient wet bulb (WB) temperature for the environment;

using the processor to calculate equivalent loop conditions for each of the CW components covering a load being thermally managed by the CW system, the equivalent loop conditions relating to a selected performance parameter for at least a subplurality of the CW components covering the load in a manner to manage cooling of the load; and

for each one of the calculated equivalent loop conditions, using the processor to generate information for balancing the CW components by selecting specific operating points of the CW system, given the user set or system measured WB temperature, to meet load requirements imposed by the load;

further comprising using the processor to analyze data from performance data tables for each one of the CW components of the CW system, the performance data tables defining at least one of operating points or operating ranges for each of the CW components based on at least one of an input or an output associated with each of the CW components, and from the performance data tables using the processor to collect the at least one of allowable operating points, allowable operating ranges or allowable operating conditions; and

wherein the operation of using the processor to generate information for balancing the CW components comprises using the processor to analyze the data and to generate a plurality of lists which include set points for each of the CW components, for every available balance point of the CW system that enables the CW system to meet the load requirements given the user set or system measured WB temperature; and

using the processor to evaluate the plurality of lists and set points for each of the CW components and to control adjustment of one or more of the CW components to optimize operation of the CW system.

2. The method of claim 1, further comprising using the information to optimize operation of the CW components by selecting specific set points for the CW components that result in optimizing a selected operational parameter for the CW system.

3. The method of claim 1, wherein the operation of obtaining a collection comprises obtaining a collection of at least one of allowable operating points, operating ranges or allowable operating conditions, for each one of the subplurality of components of the CW system, based on information at least one:

provided by the user;

or

representing a known operating parameter limitation.

4. The method of claim 1, wherein the performance parameter comprises a gallons per minute (GPM) flow of water provided by the CW system.

5. The method of claim 1, wherein the performance parameter comprises a change in temperature of the water able to be affected by the CW system.

6. The method of claim 1, wherein the performance parameter comprises a supply chilled water temperature (SWCT) of water being output by one of the CW components of the CW system.

7. The method of claim 1, wherein the set point of the each of the CW components further relates to load requirements imposed by the load.

8. The method of claim 1, wherein the selected performance parameter relates to at least one of:

electrical power consumed by the CW system;

water used by the CW system requiring replenishment;

dehumidification analysis;

equipment staging analysis;

maintenance of one or more of the CW components; and

total cost of operation of the CW system.

9. A method for analyzing and optimizing performance of a chilled water (CW) system having a plurality of CW components, the method comprising:

using a processor to analyze a performance data table for each one of the CW components of the CW system, the performance data table defining at least one of operating points or operating ranges for each of the CW components based on at least one of an input or an output associated with each of the CW components;

generating an electrical signal representative of at least one of a user set or system measured ambient wet bulb (WB) temperature for an environment in which at least a subplurality of the CW components are located;

using the processor to analyze the user set or system measured ambient wet bulb (WB) temperature for the environment;

using the processor to analyze a collection of at least one of allowable operating points, operating ranges or allowable operating conditions, for each one of the subplurality of components of the CW system, based on information;

provided by the user;

or

representing a known operating parameter limitation;

using the processor to calculate equivalent loop conditions for each of the CW components covering a load being thermally managed by the CW system, the equivalent loop conditions relating to at least one of gallons per minute (GPM), a change in temperature, and a supply chilled water temperature (SWCT) for at least a subplurality of the CW components covering the load in a manner to manage cooling of the load;

for each one of the calculated equivalent loop conditions, using the processor to analyze and balance the CW components of the CW system, given the user set or system measured WB temperature, to meet load requirements imposed by the load, to thus generate a plurality of lists which include a set point of each of the CW components, for every available balance point of the CW system, that meets the user set or system measured WB temperature and load requirements imposed by the load; and

using the processor to consider the plurality of lists and to optimize operation of the CW components by selecting specific set points for the CW components that result in optimizing a selected operational parameter for the CW system, and at least one of limiting or controlling operation of the CW components in accordance with the selected specific set points.

10. The method of claim 9, further comprising using trend data of a load distribution affecting the load affecting operation of the CW components to construct at least one of predictive optimization tables or predictive set point maps for CW system components to proactively optimize the CW system to meet changing load conditions affecting the CW system.

11. The method of claim 9, further comprising using trend data associated with a distribution and amplitude of the load to construct at least one of predictive optimization tables or predictive set point maps for the components of the CW system to meet at least one of changing load conditions or ambient temperature requirements.

12. The method of claim 11, further comprising using historical WB temperature data to construct the at least one of predictive optimization tables or set point maps.

13. The method of claim 9, wherein the selected operational parameter relates to at least one of:

electrical power consumed by the CW system;

water used by the CW system requiring replenishment;

dehumidification analysis;

equipment staging analysis;

maintenance of one or more of the CW components; and

total cost of operation of the CW system.

14. The method of claim 9, further comprising overriding a previously selected one of the selected set points for one of the CW components to cause the CW system to maintain optimization of the selected operational parameter.

15. A system for analyzing performance of a chilled water (CW) system having a plurality of CW components, the system comprising:

a subsystem to generate an electrical signal representative of at least one of a user set or system measured ambient wet bulb (WB) temperature for an environment in which at least a subplurality of the CW components are located;

at least one processor having non-transitory, machine executable code configured to;

read the electrical signal from the subsystem;

make use of a performance data table for each one of the CW components of the CW system, the performance data table defining at least one of operating points or operating ranges for each of the CW components based on at least one of an input or an output associated with each of the CW components;

make use of the electrical signal representing the at least one of a user set or system measured ambient wet bulb (WB) temperature for the environment;

make use of a collection of at least one of allowable operating points, operating ranges or allowable operating conditions, for each one of the subplurality of components of the CW system;

calculate equivalent loop conditions for each of the CW components covering a load being thermally managed by the CW system, the equivalent loop conditions relating to a performance parameter for one or more of the CW components covering the load in a manner to manage cooling of the load; and

for each one of the calculated equivalent loop conditions, generating information relating to a plurality of lists that include a set point of each of the CW components, for every available balance point, for balancing the CW components of the CW system, given the at least one of user set or system balanced WB temperature, to meet load requirements imposed by the load; and

wherein the processor is further configured to use the information to control at least a subplurality of the CW components by adjusting the subplurality of CW components to conform to at least one of a specific operating point or a specific operating range, to optimize operation of the CW system.

16. The system of claim 15, wherein the using a collection comprises using a collection of at least one of allowable operating points, operating ranges or allowable operating conditions, for each one of the subplurality of components of the CW system, based on information at least one:

provided by the user;

or

representing a known operating parameter limitation.