CN111914404B - Method for acquiring performance curve of air conditioning system cold machine based on measured data - Google Patents
Method for acquiring performance curve of air conditioning system cold machine based on measured data Download PDFInfo
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Abstract
Description
技术领域technical field
本发明属于中央空调系统设备运行以及数据监测领域，以及暖通空调系统测点安装领域，具体涉及一种基于实测数据的空调系统冷机性能曲线的获取方法。The invention belongs to the field of central air-conditioning system equipment operation and data monitoring, and the field of HVAC system measuring point installation, and in particular relates to a method for acquiring performance curves of air-conditioning system refrigerators based on measured data.
背景技术Background technique
在中央空调的冷站 中，通常使用多台冷机共同制冷，通过调节不同冷机的启停实现冷量供应，从而满足系统末端的冷量需求。在现有的冷站 控制系统中，通常由设备运行人员根据对末端冷量需求的经验估计开启几台冷机，这种经验有时候不准导致了能源浪费，因此采用合理的运行调节方法是提高中央空调系统能源利用效率的主要途径之一，冷机实际运行设备曲线是空调系统优化运行的依据之一，获取冷机实际运行设备曲线的作用在于实现合理调配运行冷机的数量以及负荷率，达到空调系统的高效、安全、节能运行目标。In the cold station of the central air conditioner, multiple chillers are usually used for cooling together, and the cold supply is realized by adjusting the start and stop of different chillers, so as to meet the cooling demand at the end of the system. In the existing cold station control system, the equipment operator usually estimates the number of chillers to be turned on based on the experience of the terminal cooling capacity demand. This experience sometimes leads to energy waste. Therefore, a reasonable operation adjustment method is One of the main ways to improve the energy utilization efficiency of the central air-conditioning system. The actual operating equipment curve of the chiller is one of the basis for the optimal operation of the air-conditioning system. The function of obtaining the actual operating equipment curve of the chiller is to achieve a reasonable allocation of the number of operating chillers and the load rate , to achieve the goal of efficient, safe and energy-saving operation of the air-conditioning system.
发明内容Contents of the invention
为解决上述问题，本发明公开了一种基于实测数据的空调系统冷机性能曲线的获取方法，在历史实测数据的基础上，得到冷机实际运行性能运行曲线，具有计算简便、拟合结果好且通用性好的优点。In order to solve the above problems, the present invention discloses a method for obtaining the performance curve of the cooling machine of the air-conditioning system based on the measured data. On the basis of the historical measured data, the actual operating performance curve of the cooling machine is obtained, which has the advantages of simple calculation and good fitting results. And the advantages of good versatility.
为达到上述目的，本发明的技术方案如下：To achieve the above object, the technical scheme of the present invention is as follows:
一种基于实测数据的空调系统冷机性能曲线的获取方法，包括以下步骤：A method for obtaining a performance curve of a cooling machine of an air-conditioning system based on measured data, comprising the following steps:
S1：数据采集：首先将安装于暖通空调中各测点数据通过网络与存储数据的平台数据库相连，将采集的数据统一存储至平台数据库内。S1: Data collection: Firstly, the data of each measuring point installed in the HVAC system is connected to the platform database for storing data through the network, and the collected data is uniformly stored in the platform database.
S2：数据分析处理：S2: Data analysis and processing:
1)计算冷机制冷量、冷凝侧换热量进行能量平衡校验1) Calculating the cooling capacity of the chiller and heat transfer on the condensing side for energy balance verification
①冷机制冷量①Cooling capacity
根据冷机的蒸发器进出水温度及流量，得冷机蒸发侧的换热量，即冷机制冷量Qe：According to the temperature and flow of water entering and leaving the evaporator of the chiller, the heat transfer on the evaporating side of the chiller, that is, the cooling capacity Q e of the chiller:
式中：Qe为冷机制冷量，kW；In the formula: Qe is the cooling capacity of the refrigerator, kW;
Ge为蒸发侧水流量，m3/h；G e is the water flow rate on the evaporation side, m 3 /h;
Te,in为蒸发器进水温度，℃；T e,in is the inlet water temperature of the evaporator, °C;
Te,out为蒸发器出水温度，℃。T e,out is the outlet water temperature of the evaporator, °C.
②冷凝侧换热量②Condensing side heat exchange
根据冷机的蒸发器进出水温度及流量，得冷机冷凝器侧换热量Qc：According to the temperature and flow rate of the water entering and leaving the evaporator of the chiller, the amount of heat transfer Qc on the condenser side of the chiller can be obtained:
式中：Qc为冷机冷凝器侧换热量，kW；In the formula: Qc is the heat transfer capacity of the condenser side of the refrigerator, kW;
Gc为冷凝侧水流量，m3/h；G c is the water flow rate on the condensing side, m 3 /h;
Tc，in为冷凝器进水温度，℃；T c, in is the temperature of the water entering the condenser, °C;
Tc，out为冷凝器出水温度，℃。T c, out is the outlet water temperature of the condenser, °C.
③能量平衡校验③ Energy balance check
冷机的蒸发侧换热量、冷凝侧的换热量和冷机功率满足能量守恒定律：The heat transfer on the evaporating side of the chiller, the heat transfer on the condensing side and the power of the chiller satisfy the law of energy conservation:
Qc＝Qe+P 2-3Q c =Q e +P 2-3
式中：P为冷机功率，kW。In the formula: P is the cooling machine power, kW.
考虑实际测量中存在误差，检验所测数据的能量不平衡率：Considering the error in the actual measurement, check the energy imbalance rate of the measured data:
当不平衡率在±20％内时，认为测量值误差在可接受范围内，否则应检查各测量值的正确性；When the unbalance rate is within ±20%, it is considered that the error of the measured value is within the acceptable range, otherwise the correctness of each measured value should be checked;
2)计算冷机负荷率、端差2) Calculate the load rate and end difference of the chiller
根据冷机运行冷机历史运行数据内包含的数据种类，分为两种情况计算冷机负荷率、端差以及冷机能效比；According to the type of data contained in the historical operation data of the chiller, it is divided into two cases to calculate the load rate of the chiller, the end difference and the energy efficiency ratio of the chiller;
情况1：有冷机内部蒸发温度与冷凝温度；Case 1: There are evaporation temperature and condensation temperature inside the refrigerator;
①负荷率PLR①Load rate PLR
冷机的工作性能与冷机负荷率相关，对冷机的负荷率进行计算：The working performance of the chiller is related to the load rate of the chiller, and the load rate of the chiller is calculated as follows:
式中：PLR为冷机的负荷率；In the formula: PLR is the load rate of the chiller;
Qrated为冷机额定制冷量，kW。Q rated is the rated cooling capacity of the chiller, kW.
②端差② end difference
蒸发器与冷凝器侧的端差影响冷机DCOP值，其值与冷机的工作性能相关，故需对端差进行计算：The end difference between the evaporator and the condenser affects the DCOP value of the refrigerator, and its value is related to the working performance of the refrigerator, so the end difference needs to be calculated:
Te＝Te，out-ΔTe 2-6T e =T e,out -ΔT e 2-6
ΔTc＝Tc-Tc，out 2-7ΔT c =T c -T c,out 2-7
式中：Te为冷机蒸发温度，℃；In the formula: T e is the evaporation temperature of the cooler, °C;
ΔTe蒸发器侧端差，℃；ΔT e is the side-to-end difference of the evaporator, °C;
Tc为冷机冷凝温度，℃； Tc is the condensation temperature of the refrigerator, °C;
ΔTc冷凝器侧端差，℃。ΔT c Condenser side-to-end difference, °C.
③通过上述计算所得PLR与ΔTc、ΔTe，拟合一次函数关系式：③Fit the relationship between PLR and ΔT c , ΔT e obtained through the above calculation:
ΔTe＝aPLR+b 2-8ΔT e =aPLR+b 2-8
ΔTc＝cPLR+d 2-9ΔT c =cPLR+d 2-9
得到系数a、b、c、d；Get the coefficients a, b, c, d;
情况2：无冷机内部蒸发温度与冷凝温度；Case 2: There is no internal evaporation temperature and condensation temperature of the chiller;
①根据情况1中所得的PLR与ΔTc、ΔTe函数关系式，通过PLR求得ΔTc、ΔTe：① According to the functional relationship between PLR and ΔT c , ΔT e obtained in Case 1, ΔT c , ΔT e are obtained through PLR:
ΔTe＝aPLR+b 2-8ΔT e =aPLR+b 2-8
ΔTc＝cPLR+d 2-9ΔT c =cPLR+d 2-9
②为计算冷机能效比，需要计算冷机蒸发温度Te与冷凝温度Tc：② In order to calculate the energy efficiency ratio of the refrigerator, it is necessary to calculate the evaporation temperature T e and the condensation temperature T c of the refrigerator:
Te＝Te，out-ΔTe 2-6T e =T e,out -ΔT e 2-6
ΔTc＝Tc-Tc，out 2-7ΔT c =T c -T c,out 2-7
3)计算冷机能效比3) Calculate the energy efficiency ratio of the cooling machine
当测量值满足能量平衡校验时，计算冷机能效比COP、DCOP与ICOP：When the measured value meets the energy balance verification, calculate the energy efficiency ratio of the cold machine COP, DCOP and ICOP:
4)根据冷机类型拟合不同冷机负荷率与能效比函数关系式4) According to the type of chiller, fit different chiller load rate and energy efficiency ratio function relationship
若冷机为离心机组则通过上述计算所得PLR与DCOP，拟合二次函数关系式：If the chiller is a centrifugal unit, the PLR and DCOP obtained through the above calculation can be fitted with a quadratic function relationship:
DCOP＝ePLR2+f PLR+g 2-13DCOP＝ePLR 2 +f PLR+g 2-13
得到系数e、f、g；Get the coefficients e, f, g;
若冷机为螺杆机组则拟合为一次函数关系式：If the cold machine is a screw unit, it is fitted as a linear function relational expression:
DCOP＝ePLR+f 2-14DCOP＝ePLR+f 2-14
得到系数e、f。Get the coefficients e, f.
本发明的有益效果是：The beneficial effects of the present invention are:
本发明所述的一种基于实测数据的空调系统冷机性能曲线的获取方法，在历史实测数据的基础上，得到冷机实际运行性能运行曲线，具有计算简便、拟合结果好且通用性好的优点。The method for obtaining the performance curve of the refrigerator of the air-conditioning system based on the measured data according to the present invention obtains the actual operation performance curve of the refrigerator on the basis of the historical measured data, and has the advantages of simple calculation, good fitting results and good versatility The advantages.
附图说明Description of drawings
图1为本发明的流程图；Fig. 1 is a flowchart of the present invention;
图2为实例1中离心机组、测量参数情况1时PLR与DCOP拟合结果；Fig. 2 is the fitting result of PLR and DCOP when the centrifuge unit in example 1, measurement parameter situation 1;
图3为实例2中离心机组、测量参数情况2时PLR与DCOP拟合结果；Fig. 3 is the fitting result of PLR and DCOP when centrifugal unit in example 2, measurement parameter situation 2;
图4为实例1中螺杆机组、测量参数情况1时PLR与DCOP拟合结果；Fig. 4 is the fitting result of PLR and DCOP when screw unit and measurement parameter situation 1 in example 1;
图5为实例1中螺杆机组、测量参数情况2时PLR与DCOP拟合结果。Fig. 5 shows the fitting results of PLR and DCOP in case 2 of the screw unit in Example 1 and the measured parameters.
具体实施方式Detailed ways
下面结合附图和具体实施方式，进一步阐明本发明，应理解下述具体实施方式仅用于说明本发明而不用于限制本发明的范围。The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.
实施例1：(离心机组、测量参数情况1)Embodiment 1: (centrifugal unit, measurement parameter situation 1)
S1：数据采集：S1: Data collection:
1)测点安装1) Measuring point installation
在系统内需求位置安装各传感器。Install each sensor at the required position in the system.
2)将各测点数据通过网络与存储数据的平台数据库相连，将采集的数据统一存储至平台数据库内。2) The data of each measuring point is connected to the platform database for storing data through the network, and the collected data is uniformly stored in the platform database.
依据采集的连续一个月的数据进行计算拟合，数据采集间隔为5分钟。Calculation and fitting are carried out based on the data collected for a continuous month, and the data collection interval is 5 minutes.
S2：数据分析处理：S2: Data analysis and processing:
1)计算冷机制冷量、冷凝侧换热量进行能量平衡校验。1) Calculate the cooling capacity of the chiller and the heat transfer on the condensing side for energy balance verification.
①冷机制冷量①Cooling capacity
根据冷机的蒸发器进出水温度及流量，可得冷机蒸发侧的换热量，即冷机制冷量Qe：According to the temperature and flow of water entering and leaving the evaporator of the chiller, the heat transfer on the evaporating side of the chiller can be obtained, that is, the cooling capacity Q e of the chiller:
②冷凝侧换热量②Condensing side heat exchange
根据冷机的冷凝器进出水温度及流量，可得冷机冷凝器侧换热量Qc：According to the temperature and flow rate of the water entering and leaving the condenser of the chiller, the amount of heat transfer Qc on the condenser side of the chiller can be obtained:
③能量平衡校验③ Energy balance check
冷机的蒸发侧换热量、冷凝侧的换热量和冷机功率满足能量守恒定律：The heat transfer on the evaporating side of the chiller, the heat transfer on the condensing side and the power of the chiller satisfy the law of energy conservation:
Qc＝Qe+P 2-3Q c =Q e +P 2-3
考虑实际测量中存在误差，应检验所测数据的能量不平衡率：Considering that there are errors in the actual measurement, the energy imbalance rate of the measured data should be checked:
当不平衡率在±20％内时，认为测量值误差在可接受范围内，否则应检查各测量值的正确性。When the unbalance rate is within ±20%, it is considered that the error of the measured value is within the acceptable range, otherwise the correctness of each measured value should be checked.
2)计算冷机负荷率、端差2) Calculate the load rate and end difference of the chiller
根据冷机运行冷机历史运行数据内包含的数据种类，可以分为两种情况计算冷机负荷率、端差以及冷机能效比。According to the type of data contained in the historical operation data of the chiller, it can be divided into two cases to calculate the load rate of the chiller, the end difference and the energy efficiency ratio of the chiller.
情况1：有冷机内部蒸发温度与冷凝温度；Case 1: There are evaporation temperature and condensation temperature inside the refrigerator;
①负荷率PLR①Load rate PLR
冷机的工作性能与冷机负荷率相关，应对冷机的负荷率进行计算。The working performance of the chiller is related to the load rate of the chiller, and the load rate of the chiller should be calculated.
②端差② end difference
蒸发器与冷凝器侧的端差影响冷机DCOP值，其值与冷机的工作性能相关，故需对端差进行计算：The end difference between the evaporator and the condenser affects the DCOP value of the refrigerator, and its value is related to the working performance of the refrigerator, so the end difference needs to be calculated:
Te＝Te，out-ΔTe 2-6T e =T e,out -ΔT e 2-6
ΔTc＝Tc-Tc，out 2-7ΔT c =T c -T c,out 2-7
③通过上述计算所得PLR与ΔTc、ΔTe，拟合一次函数关系式：③Fit the relationship between PLR and ΔT c , ΔT e obtained through the above calculation:
ΔTe＝aPLR+b 2-8ΔT e =aPLR+b 2-8
ΔTc＝cPLR+d 2-9ΔT c =cPLR+d 2-9
得到系数a、b、c、d。Get the coefficients a, b, c, d.
3)计算冷机能效比3) Calculate the energy efficiency ratio of the cooling machine
当测量值满足能量平衡校验时，计算冷机能效比COP、DCOP与ICOP：When the measured value meets the energy balance verification, calculate the energy efficiency ratio of the cold machine COP, DCOP and ICOP:
4)根据冷机类型拟合不同冷机负荷率与能效比函数关系式4) According to the type of chiller, fit different chiller load rate and energy efficiency ratio function relationship
冷机为离心机组则通过上述计算所得PLR与DCOP，拟合二次函数关系式：If the cold machine is a centrifugal unit, the PLR and DCOP obtained through the above calculation are fitted with a quadratic function relational expression:
DCOP＝ePLR2+f PLR+g 2-13DCOP＝ePLR 2 +f PLR+g 2-13
得到系数e、f、g。拟合结果如附图2所示。Get the coefficients e, f, g. The fitting results are shown in Figure 2.
实施例2：Example 2:
S1：数据采集：S1: Data collection:
1)测点安装1) Measuring point installation
在系统内需求位置安装各传感器。Install each sensor at the required position in the system.
2)将各测点数据通过网络与存储数据的平台数据库相连，将采集的数据统一存储至平台数据库内。2) The data of each measuring point is connected to the platform database for storing data through the network, and the collected data is uniformly stored in the platform database.
依据采集的连续一个月的数据进行计算拟合，数据采集间隔为5分钟。Calculation and fitting are carried out based on the data collected for a continuous month, and the data collection interval is 5 minutes.
S2：数据分析处理：S2: Data analysis and processing:
1)计算冷机制冷量、冷凝侧换热量进行能量平衡校验。1) Calculate the cooling capacity of the chiller and the heat transfer on the condensing side for energy balance verification.
①冷机制冷量①Cooling capacity
根据冷机的蒸发器进出水温度及流量，可得冷机蒸发侧的换热量，即冷机制冷量Qe：According to the temperature and flow of water entering and leaving the evaporator of the chiller, the heat transfer on the evaporating side of the chiller can be obtained, that is, the cooling capacity Q e of the chiller:
②冷凝侧换热量②Condensing side heat exchange
根据冷机的冷凝器进出水温度及流量，可得冷机冷凝器侧换热量Qc：According to the temperature and flow rate of the water entering and leaving the condenser of the chiller, the amount of heat transfer Qc on the condenser side of the chiller can be obtained:
③能量平衡校验③ Energy balance check
冷机的蒸发侧换热量、冷凝侧的换热量和冷机功率满足能量守恒定律：The heat transfer on the evaporating side of the chiller, the heat transfer on the condensing side and the power of the chiller satisfy the law of energy conservation:
Qc＝Qe+P 2-3Q c =Q e +P 2-3
考虑实际测量中存在误差，应检验所测数据的能量不平衡率：Considering that there are errors in the actual measurement, the energy imbalance rate of the measured data should be checked:
当不平衡率在±20％内时，认为测量值误差在可接受范围内，否则应检查各测量值的正确性。When the unbalance rate is within ±20%, it is considered that the error of the measured value is within the acceptable range, otherwise the correctness of each measured value should be checked.
2)计算冷机负荷率、端差2) Calculate the load rate and end difference of the chiller
根据冷机运行冷机历史运行数据内包含的数据种类，可以分为两种情况计算冷机负荷率、端差以及冷机能效比。According to the type of data contained in the historical operation data of the chiller, it can be divided into two cases to calculate the load rate of the chiller, the end difference and the energy efficiency ratio of the chiller.
情况2：无冷机内部蒸发温度与冷凝温度；Case 2: There is no internal evaporation temperature and condensation temperature of the chiller;
①根据情况1中所得的PLR与ΔTc、ΔTe函数关系式，可通过PLR求得ΔTc、ΔTe。① According to the functional relationship between PLR and ΔT c , ΔT e obtained in Case 1, ΔT c , ΔT e can be obtained through PLR.
ΔTe＝aPLR+b 2-8ΔT e =aPLR+b 2-8
ΔTc＝cPLR+d 2-9ΔT c =cPLR+d 2-9
②为计算冷机能效比，需要计算冷机蒸发温度Te与冷凝温度Tc：② In order to calculate the energy efficiency ratio of the refrigerator, it is necessary to calculate the evaporation temperature T e and the condensation temperature T c of the refrigerator:
Te＝Te，out-ΔTe 2-6T e =T e,out -ΔT e 2-6
ΔTc＝Tc-Tc，out 2-7ΔT c =T c -T c,out 2-7
3)计算冷机能效比3) Calculate the energy efficiency ratio of the cooling machine
当测量值满足能量平衡校验时，计算冷机能效比COP、DCOP与ICOP：When the measured value meets the energy balance verification, calculate the energy efficiency ratio of the cold machine COP, DCOP and ICOP:
4)根据冷机类型拟合不同冷机负荷率与能效比函数关系式4) According to the type of chiller, fit different chiller load rate and energy efficiency ratio function relationship
冷机为离心机组则通过上述计算所得PLR与DCOP，拟合二次函数关系式：If the cold machine is a centrifugal unit, the PLR and DCOP obtained through the above calculation are fitted with a quadratic function relational expression:
DCOP＝ePLR2+f PLR+g 2-13DCOP＝ePLR 2 +f PLR+g 2-13
得到系数e、f、g。拟合结果如附图3所示。Get the coefficients e, f, g. The fitting results are shown in Figure 3.
实施例3：Example 3:
S1：数据采集：S1: Data collection:
1)测点安装1) Measuring point installation
在系统内需求位置安装各传感器。Install each sensor at the required position in the system.
2)将各测点数据通过网络与存储数据的平台数据库相连，将采集的数据统一存储至平台数据库内。2) The data of each measuring point is connected to the platform database for storing data through the network, and the collected data is uniformly stored in the platform database.
依据采集的连续一个月的数据进行计算拟合，数据采集间隔为5分钟。Calculation and fitting are carried out based on the data collected for a continuous month, and the data collection interval is 5 minutes.
S2：数据分析处理：S2: Data analysis and processing:
1)计算冷机制冷量、冷凝侧换热量进行能量平衡校验。1) Calculate the cooling capacity of the chiller and the heat transfer on the condensing side for energy balance verification.
①冷机制冷量①Cooling capacity
根据冷机的蒸发器进出水温度及流量，可得冷机蒸发侧的换热量，即冷机制冷量Qe：According to the temperature and flow of water entering and leaving the evaporator of the chiller, the heat transfer on the evaporating side of the chiller can be obtained, that is, the cooling capacity Q e of the chiller:
②冷凝侧换热量②Condensing side heat exchange
根据冷机的冷凝器进出水温度及流量，可得冷机冷凝器侧换热量Qc：According to the temperature and flow rate of the water entering and leaving the condenser of the chiller, the amount of heat transfer Qc on the condenser side of the chiller can be obtained:
③能量平衡校验③ Energy balance check
冷机的蒸发侧换热量、冷凝侧的换热量和冷机功率满足能量守恒定律：The heat transfer on the evaporating side of the chiller, the heat transfer on the condensing side and the power of the chiller satisfy the law of energy conservation:
Qc＝Qe+P 2-3Q c =Q e +P 2-3
考虑实际测量中存在误差，应检验所测数据的能量不平衡率：Considering that there are errors in the actual measurement, the energy imbalance rate of the measured data should be checked:
当不平衡率在±20％内时，认为测量值误差在可接受范围内，否则应检查各测量值的正确性。When the unbalance rate is within ±20%, it is considered that the error of the measured value is within the acceptable range, otherwise the correctness of each measured value should be checked.
2)计算冷机负荷率、端差2) Calculate the load rate and end difference of the chiller
根据冷机运行冷机历史运行数据内包含的数据种类，可以分为两种情况计算冷机负荷率、端差以及冷机能效比。According to the type of data contained in the historical operation data of the chiller, it can be divided into two cases to calculate the load rate of the chiller, the end difference and the energy efficiency ratio of the chiller.
情况1：有冷机内部蒸发温度与冷凝温度；Case 1: There are evaporation temperature and condensation temperature inside the refrigerator;
①负荷率PLR①Load rate PLR
冷机的工作性能与冷机负荷率相关，应对冷机的负荷率进行计算。The working performance of the chiller is related to the load rate of the chiller, and the load rate of the chiller should be calculated.
②端差② end difference
蒸发器与冷凝器侧的端差影响冷机DCOP值，其值与冷机的工作性能相关，故需对端差进行计算：The end difference between the evaporator and the condenser affects the DCOP value of the refrigerator, and its value is related to the working performance of the refrigerator, so the end difference needs to be calculated:
Te＝Te，out-ΔTe 2-6T e =T e,out -ΔT e 2-6
ΔTc＝Tc-Tc，out 2-7ΔT c =T c -T c,out 2-7
③通过上述计算所得PLR与ΔTc、ΔTe，拟合一次函数关系式：③Fit the relationship between PLR and ΔT c , ΔT e obtained through the above calculation:
ΔTe＝aPLR+b 2-8ΔT e =aPLR+b 2-8
ΔTc＝cPLR+d 29ΔT c =cPLR+d 29
得到系数a、b、c、d。Get the coefficients a, b, c, d.
3)计算冷机能效比3) Calculate the energy efficiency ratio of the cooling machine
当测量值满足能量平衡校验时，计算冷机能效比COP、DCOP与ICOP：When the measured value meets the energy balance verification, calculate the energy efficiency ratio of the cold machine COP, DCOP and ICOP:
4)根据冷机类型拟合不同冷机负荷率与能效比函数关系式4) According to the type of chiller, fit different chiller load rate and energy efficiency ratio function relationship
冷机为螺杆机组则通过上述计算所得PLR与DCOP，拟合一次函数关系式：If the cold machine is a screw unit, the PLR and DCOP obtained through the above calculation are fitted with a linear function relationship:
DCOP＝ePLR+f 2-13DCOP＝ePLR+f 2-13
得到系数e、f。拟合结果如附图4所示。Get the coefficients e, f. The fitting results are shown in Figure 4.
实施例4：Example 4:
S1：数据采集：S1: Data collection:
1)测点安装1) Measuring point installation
在系统内需求位置安装各传感器。Install each sensor at the required position in the system.
2)将各测点数据通过网络与存储数据的平台数据库相连，将采集的数据统一存储至平台数据库内。2) The data of each measuring point is connected to the platform database for storing data through the network, and the collected data is uniformly stored in the platform database.
依据采集的连续一个月的数据进行计算拟合，数据采集间隔为5分钟。Calculation and fitting are carried out based on the data collected for a continuous month, and the data collection interval is 5 minutes.
S2：数据分析处理：S2: Data analysis and processing:
1)计算冷机制冷量、冷凝侧换热量进行能量平衡校验。1) Calculate the cooling capacity of the chiller and the heat transfer on the condensing side for energy balance verification.
①冷机制冷量①Cooling capacity
根据冷机的蒸发器进出水温度及流量，可得冷机蒸发侧的换热量，即冷机制冷量Qe；According to the temperature and flow rate of the water entering and leaving the evaporator of the chiller, the heat transfer on the evaporating side of the chiller can be obtained, that is, the cooling capacity Q e of the chiller;
②冷凝侧换热量②Condensing side heat exchange
根据冷机的冷凝器进出水温度及流量，可得冷机冷凝器侧换热量Qc；According to the temperature and flow rate of the water entering and exiting the condenser of the chiller, the heat transfer quantity Q c of the condenser side of the chiller can be obtained;
③能量平衡校验③ Energy balance check
冷机的蒸发侧换热量、冷凝侧的换热量和冷机功率满足能量守恒定律：The heat transfer on the evaporating side of the chiller, the heat transfer on the condensing side and the power of the chiller satisfy the law of energy conservation:
Qc＝Qe+P 2-3Q c =Q e +P 2-3
考虑实际测量中存在误差，应检验所测数据的能量不平衡率：Considering that there are errors in the actual measurement, the energy imbalance rate of the measured data should be checked:
当不平衡率在±20％内时，认为测量值误差在可接受范围内，否则应检查各测量值的正确性。When the unbalance rate is within ±20%, it is considered that the error of the measured value is within the acceptable range, otherwise the correctness of each measured value should be checked.
2)计算冷机负荷率、端差2) Calculate the load rate and end difference of the chiller
根据冷机运行冷机历史运行数据内包含的数据种类，可以分为两种情况计算冷机负荷率、端差以及冷机能效比。According to the type of data contained in the historical operation data of the chiller, it can be divided into two cases to calculate the load rate of the chiller, the end difference and the energy efficiency ratio of the chiller.
情况2：无冷机内部蒸发温度与冷凝温度；Case 2: There is no internal evaporation temperature and condensation temperature of the chiller;
①根据情况1中所得的PLR与ΔTc、ΔTe函数关系式，可通过PLR求得ΔTc、ΔTe。① According to the functional relationship between PLR and ΔT c , ΔT e obtained in Case 1, ΔT c , ΔT e can be obtained through PLR.
ΔTe＝aPLR+b 2-8ΔT e =aPLR+b 2-8
ΔTc＝cPLR+d 2-9ΔT c =cPLR+d 2-9
②为计算冷机能效比，需要计算冷机蒸发温度Te与冷凝温度Tc：② In order to calculate the energy efficiency ratio of the refrigerator, it is necessary to calculate the evaporation temperature T e and the condensation temperature T c of the refrigerator:
Te＝Te，out-ΔTe 2-6T e =T e,out -ΔT e 2-6
ΔTc＝Tc-Tc，out 2-7ΔT c =T c -T c,out 2-7
3)计算冷机能效比3) Calculate the energy efficiency ratio of the cooling machine
当测量值满足能量平衡校验时，计算冷机能效比COP、DCOP与ICOP：When the measured value meets the energy balance verification, calculate the energy efficiency ratio of the cold machine COP, DCOP and ICOP:
4)根据冷机类型拟合不同冷机负荷率与能效比函数关系式4) According to the type of chiller, fit different chiller load rate and energy efficiency ratio function relationship
冷机为螺杆机组则通过上述计算所得PLR与DCOP，拟合一次函数关系式：If the cold machine is a screw unit, the PLR and DCOP obtained through the above calculation are fitted with a linear function relationship:
DCOP＝ePLR+f 2-13DCOP＝ePLR+f 2-13
得到系数e、f。拟合结果如附图5所示。Get the coefficients e, f. The fitting results are shown in Figure 5.
本发明方案所公开的技术手段不仅限于上述实施方式所公开的技术手段，还包括由以上技术特征任意组合所组成的技术方案。The technical means disclosed in the solutions of the present invention are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.
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