Chiller unit energy consumption calculating method, calculating device, and chiller unit

Abstract

This application provides a device, system and method for predicting and calculating energy consumption of a chiller unit. The system and method includes: a chiller unit load prediction step of predicting and outputting a total load of the chiller unit based on a preset cooling load prediction model; a chiller load distribution step of distributing the total load of the chiller unit to generate a first chiller load and a second chiller load, according to a chiller load distribution logic; a chiller energy efficiency value acquisition step of correspondingly acquiring a first chiller energy efficiency value and a second chiller energy efficiency value according to a chiller load-energy efficiency relationship; and a chiller power calculation step of calculating a first chiller input power and a second chiller input power according to the first chiller energy efficiency value and the second chiller energy efficiency value.

1 . A chiller unit system, the system comprising:
 a first chiller and a second chiller; and   a controller, the controller being operatively connected to the first chiller and the second chiller, wherein the controller comprises:
 a processor coupled to a memory storing instructions executable by the processor, which causes the controller to:
 predict and output, via a chiller unit load prediction module, a total load of the chiller unit based on a cooling load prediction model; 
 distribute, via a chiller load distribution module, the total load of the chiller unit output by the chiller unit load prediction module to the first chiller and the second chiller of the chiller unit, according to a chiller load distribution logic; 
 acquire, via a chiller energy efficiency value acquisition module, a first chiller energy efficiency value and a second chiller energy efficiency value according to a chiller load-energy efficiency relationship, based on a first chiller load and a second chiller load distributed and output by the chiller load distribution module; and 
 calculate, via a chiller power calculation module, a first chiller input power and a second chiller input power according to the first chiller energy efficiency value and the second chiller energy efficiency value acquired by the chiller energy efficiency value acquisition module. 
 
   
     
     
         2 . The chiller unit system according to  claim 1 , wherein the system further comprises:
 a first water pump operatively connected to the first chiller; and   a second water pump operatively connected to the second chiller.   
     
     
         3 . The chiller unit system according to  claim 2 , wherein the processor coupled to the memory storing instructions executable by the processor further causes the controller to:
 predict and output, via a water pump load prediction module, a total load of the first and second water pumps based on the cooling load prediction model;   distribute, via a water pump load distribution module, the total load of the first and second water pumps according to the chiller load distribution logic;   acquire, via a water pump efficiency acquisition module, a first water pump efficiency value and a second water pump efficiency value according to a water pump load-efficiency curve, based on the first water pump load and the second water pump load distributed by the water pump load distribution unit; and   calculate, via a water pump power calculation module, a first water pump input power and a second water pump input power according to the output of the water pump load distribution module and the water pump efficiency acquisition module.   
     
     
         4 . The chiller unit system according to  claim 1 , wherein the cooling load prediction model is a data-driven model, a physical prediction model, or a combination of the data-driven model and the physical prediction model. 
     
     
         5 . The chiller unit system according to  claim 1 , wherein the system further comprises:
 a first sensor operatively connected with the first chiller;   a second sensor operatively connected with the second chiller; and   wherein the first and the second sensor are configured to acquire working conditions of the first chiller and the second chiller in real-time.   
     
     
         6 . A chiller unit system, the system comprising:
 a first chiller, a second chiller, and a third chiller; and   a controller, the controller being operatively connected to the first chiller, the second chiller and the third chiller, wherein the controller comprises:
 a processor coupled to a memory storing instructions executable by the processor, which causes the controller to:
 predict and output, via a chiller unit load prediction module, a total load of the chiller unit based on a cooling load prediction model; 
 distribute, via a chiller load distribution module, the total load of the chiller unit output by the chiller unit load prediction module to the first chiller, the second chiller and the third chiller of the chiller unit, according to a chiller load distribution logic; 
 acquire, via a chiller energy efficiency value acquisition module, a first chiller energy efficiency value, a second chiller efficiency value and a third chiller energy efficiency value according to a chiller load-energy efficiency relationship, based on a first chiller load, a second chiller load and a third chiller load distributed and output by the chiller load distribution module; and 
 calculate, via a chiller power calculation module, a first chiller input power, a second chiller input power and a third chiller input power according to the first chiller energy efficiency value, the second chiller energy efficiency value and the third chiller energy efficiency value acquired by the chiller energy efficiency value acquisition module. 
 
   
     
     
         7 . The chiller unit system according to  claim 6 , wherein the system further comprises:
 a first water pump operatively connected to the first chiller;   a second water pump operatively connected to the second chiller; and   a third water pump operatively connected to the third chiller.   
     
     
         8 . The chiller unit system according to  claim 7 , wherein the processor coupled to the memory storing instructions executable by the processor further causes the controller to:
 predict and output, via a water pump load prediction module, a total load of the first, second and third water pumps based on the cooling load prediction model;   distribute, via a water pump load distribution module, the total load of the first, second and third water pumps according to the chiller load distribution logic;   acquire, via a water pump efficiency acquisition module, a first water pump efficiency value, a second water pump efficiency value and a third water pump efficiency value according to a water pump load-efficiency curve, based on the first water pump load, second water pump load and the third water pump load distributed by the water pump load distribution unit; and   calculate, via a water pump power calculation module, a first water pump input power and a second water pump input power according to the output of the water pump load distribution module and the water pump efficiency acquisition module.   
     
     
         9 . The chiller unit system according to  claim 6 , wherein the cooling load prediction model is a data-driven model, a physical prediction model, or a combination of the data-driven model and the physical prediction model. 
     
     
         10 . The chiller unit system according to  claim 6 , wherein the system further comprises:
 a first sensor operatively connected with the first chiller;   a second sensor operatively connected with the second chiller;   a third sensor operatively connected with the third chiller; and   wherein the first, second and the third sensor are configured to acquire working conditions of the first chiller, the second chiller and the third chiller in real-time.   
     
     
         11 . A method for calculating energy consumption of a chiller unit, the method comprising:
 calculating energy consumption using the chiller unit system according to  claim 1 .