Visualization method and system for systematically displaying energy efficiency levels of central air-conditioning cold and heat sources

Abstract

The present invention specifically relates to a visualization method and system for systematically displaying the energy efficiency level of central air-conditioning cold and heat sources, wherein the visualization method for systematically displaying the energy efficiency level of central air-conditioning cold and heat sources includes: obtaining the cost per unit of cooling / heat received by each device on the supply side of the central air-conditioning system and the air-conditioned area, referred to as the "input unit consumption", and the cost per unit of cooling / heat output, referred to as the "output unit consumption"; and displaying the input unit consumption and output unit consumption of each device through a host computer; the present invention describes the transmission of the intuitive energy efficiency indicator of cooling and heat unit consumption between devices, which is convenient for evaluating the energy efficiency level of the device body and the subsystem in which the device is located, and helps users to intuitively understand the ins and outs of cooling and heat unit consumption of cold and heat sources from different subsystems and devices in different links of the same subsystem.

Description

Technical Field

[0001] The present invention belongs to the technical field of building automation, and in particular relates to a visualization method and system for systematically displaying the energy efficiency level of cold and hot sources of a central air conditioner. Background Art

[0002] The central air conditioning system is divided into two parts: the supply side and the demand side. The supply side mainly includes equipment such as chillers, boilers, water pumps, and cooling towers. As the cold and heat sources of the central air conditioner, they provide cold water or hot water for heating. The supply side of the central air conditioner, or cold and heat source, is a major energy consumer in buildings. In order to reduce the energy consumption of the cold and heat sources of air conditioners, the current practice is to evaluate the efficiency of the overall cold and heat sources and the main equipment, and then find the bottleneck that "drags down" the entire system. Efficiency is usually expressed in terms of cooling / heat generated per unit of energy consumption, also known as energy efficiency ratio; or there are other methods that count the energy consumption distribution of chillers, water pumps, and cooling towers to determine whether their composition is reasonable.

[0003] Building automation systems usually consist of controllers and host computer software. The host computer software will display the operating status of each device of the air conditioning cold and heat source in real time. With the increasing awareness of energy conservation, the host computer software provides more and more functions in energy efficiency evaluation. Usually, different methods are used to display the equipment efficiency or system efficiency, as well as the energy consumption percentage of each part of the cold and heat source.

[0004] The existing efficiency evaluation of the overall and main equipment of the heat and cold source is mainly based on the analysis method of the efficiency of a single device and the overall efficiency, ignoring the efficiency of the subsystem in which the equipment is located, and the subsystem is the more direct factor that determines the efficiency of the entire heat and cold source. Figure 2 As shown, when the energy consumption per unit of cooling / heating of chiller 1 is higher than that of chiller 2, considering the equipment efficiency alone, the user should let chiller 2 do more cooling. However, since the cooling subsystem of chiller 1 is more conducive to heat dissipation, per unit energy consumption, the subsystem where chiller 1 is located may have a higher cooling capacity than the subsystem where chiller 2 is located. At this time, the user should choose to let the subsystem where chiller 1 is located do more cooling / heating.

[0005] The method of statistically analyzing the energy consumption distribution of chillers, water pumps, and cooling towers also tends to ignore the efficiency advantages and disadvantages of different subsystems composed of different equipment. For example, the analysis shows that the total energy consumption of the chiller pump accounts for 20% of the total energy consumption of the cold and heat source. It is generally believed that the energy consumption of the chiller pump is high. However, this conclusion may obscure the fact that the high-efficiency chiller pump equipped with chiller 1 has an "excellent" energy efficiency level.

[0006] The above two methods cannot describe the transmission of cooling / heat unit consumption, an energy efficiency indicator that most users can intuitively feel, between devices. They cannot overcome the defect of focusing on the device itself while ignoring the subsystem in which the device is located. They cannot help users intuitively understand the ins and outs of cooling / heat unit consumption of cold and hot sources from different subsystems and equipment in different links of the same subsystem. Summary of the invention

[0007] The purpose of the present invention is to provide a visualization method and system for systematically displaying the energy efficiency level of cold and hot sources of central air conditioners.

[0008] In order to solve the above technical problems, the present invention provides a visualization method for systematically displaying the energy efficiency level of central air-conditioning cold and heat sources, including: obtaining the input unit consumption and output unit consumption of each device on the supply side of the central air-conditioning system and the air-conditioned area; and sending the input unit consumption and output unit consumption of each device to a host computer, and displaying the input unit consumption and output unit consumption of each device through the host computer.

[0009] Furthermore, the equipment on the supply side of the central air conditioning system includes: a cooling tower, and the input unit consumption and output unit consumption of the cooling tower are obtained by the following method:

[0010] set up

[0011] ;

[0012] set up

[0013] ;

[0014] in:

[0015] is the current electrical power of the cooling tower; is the current electricity price; is the current heat exchange power of the cooling tower.

[0016] Furthermore, the equipment on the supply side of the central air conditioning system further includes: a cooling pump, and the input unit consumption and output unit consumption of the cooling pump are obtained by the following method:

[0017] set up

[0018] ;

[0019] set up

[0020] ;

[0021] in:

[0022] is the sum of the current electrical power of all relevant cooling towers; is the sum of the current heat transfer powers of all relevant cooling towers; is the current electrical power of the cooling pump; and

[0023] .

[0024] Furthermore, the equipment on the supply side of the central air-conditioning system further includes: a chiller, and the input unit consumption and output unit consumption of the chiller are obtained by the following method:

[0025] If the chiller is an air-cooled unit, then,

[0026] set up

[0027] ;

[0028] set up

[0029] ;

[0030] in: is the current electrical power of the air cooler; is the current cooling (heating) power of the air cooler;

[0031] If the chiller is a water-cooled unit, then,

[0032] set up

[0033] ;

[0034] set up

[0035] ;

[0036] in:

[0037] is the energy consumption rate delivered by the relevant cooling pump, that is, the energy consumption cost of the cooling heat delivered per unit time, and

[0038] ;

[0039] If the unit of output consumption is RMB / kWh, the unit of energy consumption rate is RMB / hour.

[0040] is the sum of the cooling powers delivered by the associated cooling pumps, and

[0041] ;

[0042] is the current electrical power of the water cooling unit; is the current cooling (heating) power of the water-cooling unit; and

[0043] .

[0044] Furthermore, the equipment on the supply side of the central air conditioning system also includes: a boiler, and the input unit consumption and output unit consumption of the boiler are obtained by the following method:

[0045] If the boiler is a conventional boiler, then,

[0046] set up

[0047] ;

[0048] set up

[0049] ;

[0050] in: is the current energy consumption of the boiler; is the current energy price; is the current heating power of the boiler;

[0051] If the boiler is a heat storage boiler and the boiler is in the heat storage state, then,

[0052] set up

[0053] ;

[0054] set up

[0055] ;

[0056] in: The energy cost of storing heat for the last few minutes; is the total amount of heat storage in the corresponding time period;

[0057] If the boiler is a heat storage boiler, and the boiler releases heat while storing heat, then,

[0058] set up

[0059] ;

[0060] set up

[0061] ;

[0062] in: The energy cost of storing heat for the last few minutes; is the total amount of heat storage in the corresponding time period; is the total amount of heat released in the corresponding time period;

[0063] If the boiler is a heat storage boiler and the boiler is in the heat release state, then,

[0064] set up

[0065] ;

[0066] set up

[0067] ;

[0068] in: is the total energy consumption cost of the most recent heat storage; is the most recent total heat storage amount; It is the total amount of heat released in the most recent heat storage process.

[0069] Furthermore, the equipment on the supply side of the central air-conditioning system further includes: a cold storage device, and the input unit consumption and output unit consumption of the cold storage device are obtained by the following method:

[0070] If the cold storage equipment is in the cold (ice) storage stage, then,

[0071] set up

[0072] ;

[0073] set up

[0074] ;

[0075] If the cold storage equipment is in the cooling (melting) stage, then,

[0076] set up

[0077] ;

[0078] set up

[0079] ;

[0080] in: Energy consumption rate delivered for the relevant cold storage water pumps; The total cooling power delivered by the related cold storage water pumps; is the total energy consumption cost of the most recent cold (ice) storage; The total amount of cold (ice) stored most recently;

[0081] and

[0082] ;as well as

[0083] .

[0084] Furthermore, the equipment on the supply side of the central air conditioning system also includes: a refrigeration pump and a heating pump, and the input unit consumption and output unit consumption of the refrigeration pump and the heating pump are obtained in the same way, that is, the input unit consumption and output unit consumption of the refrigeration pump are obtained by the following method:

[0085] set up

[0086] ;

[0087] set up

[0088] ;

[0089] in: Energy consumption rates delivered for relevant chillers and boilers; is the sum of the output power of the relevant chillers and boilers; is the current electrical power of the cooling water pump; The total cooling / heating power of the relevant chillers and boilers;

[0090] and

[0091] ;as well as

[0092] .

[0093] Furthermore, the equipment on the supply side of the central air conditioning system further includes: a heat exchanger, and the input unit consumption and output unit consumption of the heat exchanger are obtained by the following method:

[0094] set up

[0095] ;

[0096] set up

[0097] ;

[0098] in:

[0099] is the energy consumption rate delivered by the relevant upstream pump, and

[0100] ;

[0101] is the sum of the cooling heat power delivered by the relevant upstream pumps, and

[0102] .

[0103] Furthermore, the equipment on the supply side of the central air conditioning system further includes: a water collector and a water distributor, and the input unit consumption and the output unit consumption of the water collector and the water distributor are obtained by the following method:

[0104] set up

[0105] ;

[0106] set up

[0107] ;

[0108] in:

[0109] is the energy consumption rate of the relevant upstream pump-transfer, and

[0110] ;

[0111] is the sum of the cooling and heating powers delivered by the relevant upstream pumps, and

[0112] ;

[0113] The sum of the cooling and heating power output of each branch on the secondary side; and

[0114] .

[0115] Furthermore, the equipment on the supply side of the central air conditioning system further includes: a secondary pump, and the input unit consumption and output unit consumption of the secondary pump are obtained by the following method:

[0116] set up

[0117] ;

[0118] set up

[0119] ;

[0120] in: The refrigeration heat power delivered by the secondary pump; is the current electrical power of the water pump; and

[0121] .

[0122] Furthermore, the input unit consumption and output unit consumption of the air-conditioning area of ​​the central air-conditioning system are obtained by the following method:

[0123] If there is no secondary pump in the air-conditioned area, then,

[0124] set up

[0125] ;

[0126] set up

[0127] ;

[0128] If there is a secondary pump in the air-conditioned area, then,

[0129] set up

[0130] ;

[0131] set up

[0132] ;

[0133] in: Energy consumption rate delivered for the associated secondary pump; The sum of the cooling and heating powers delivered by the relevant secondary pumps;

[0134] and

[0135] .

[0136] On the other hand, the present invention also provides a visualization system for the energy efficiency level of cold and heat sources of central air conditioning, comprising: a host computer and a data acquisition device; the data acquisition device is suitable for collecting input unit consumption and output unit consumption data of several devices located on the supply side of the central air conditioning system and the air-conditioned areas, and sending them to the host computer; and the host computer is suitable for displaying the input unit consumption and output unit consumption of each device and the air-conditioned area.

[0137] The beneficial effect of the present invention is that the visualization method for systematically displaying the energy efficiency level of the cold and heat sources of the central air-conditioning system of the present invention obtains the input unit consumption and output unit consumption of each device on the supply side of the central air-conditioning system, and then displays the input unit consumption and output unit consumption of each device through a host computer, thereby evaluating the energy efficiency level of the cold and heat sources of the central air-conditioning through the input unit consumption and output unit consumption of each device, thereby overcoming the defect that the current evaluation of the energy efficiency level of the cold and heat sources of the central air-conditioning only evaluates the device itself while ignoring the level of mutual influence of energy efficiency between devices.

[0138] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0139] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0140] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0141] Figure 1 It is a flow chart of a visualization method for systematically displaying the energy efficiency level of cold and hot sources of a central air conditioner according to the present invention;

[0142] Figure 2 It is a principle block diagram of a central air conditioning cold and heat source water system corresponding to the visualization method for systematically displaying the energy efficiency level of the central air conditioning cold and heat source of the present invention;

[0143] Figure 3 It is one of the visualization methods for systematically displaying the energy efficiency level of central air-conditioning cold and heat sources of the present invention, and is used to display the histogram of input and output unit consumption. DETAILED DESCRIPTION

[0144] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0145] Example 1

[0146] like Figure 1 As shown, this embodiment 1 provides a visualization method for systematically displaying the energy efficiency level of the cold and heat sources of the central air-conditioning, including: step S1, obtaining the input unit consumption and output unit consumption of each device on the supply side of the central air-conditioning system; and step S2, sending the input unit consumption and output unit consumption of each device to a host computer, and displaying the input unit consumption and output unit consumption of each device through the host computer.

[0147] Specifically, the method for systematically displaying the visualization of the energy efficiency level of the cold and heat sources of the central air-conditioning in this embodiment obtains the input unit consumption and output unit consumption of each device on the supply side of the central air-conditioning system, and then displays the input unit consumption and output unit consumption of each device through a host computer, thereby evaluating the energy efficiency level of the cold and heat sources of the central air-conditioning through the input unit consumption and output unit consumption of each device, thereby overcoming the defect that the current evaluation of the energy efficiency level of the cold and heat sources of the central air-conditioning only evaluates the device itself while ignoring the mutual influence of energy efficiency between devices.

[0148] Specifically, it should be noted that, in this embodiment, the cost per unit of cold / heat received by the device is called "input unit consumption", and the unit is: yuan / kWh or yuan / MWh, etc.; the cost per unit of cold / heat sent by the device to the user side is called "output unit consumption", and the unit is the same as the input unit consumption.

[0149] In this embodiment, the equipment on the supply side of the central air conditioning system includes: a cooling tower, and the input unit consumption and output unit consumption of the cooling tower are obtained by the following method:

[0150] set up

[0151] ;

[0152] set up

[0153] ;

[0154] in: is the current electrical power of the cooling tower; is the current electricity price; is the current heat exchange power of the cooling tower.

[0155] In this embodiment, the equipment on the supply side of the central air conditioning system further includes: a cooling pump, and the input unit consumption and output unit consumption of the cooling pump are obtained by the following method:

[0156] set up

[0157] ;

[0158] set up

[0159] ;

[0160] in: is the sum of the current electrical power of all relevant cooling towers; is the sum of the current heat transfer powers of all relevant cooling towers; is the current electrical power of the cooling pump; and

[0161] .

[0162] Specifically, Figure 2 Taking the central air conditioning cold and hot source water system principle block diagram as an example, for cooling pump 1, the related cooling towers are cooling tower 1 and cooling tower 2; for cooling pump 2, the related cooling towers are cooling tower 3, cooling tower 4, and cooling tower 5; for the cooling pump, calculate the cooling power P of the cooling pump. .

[0163] In this embodiment, the equipment on the supply side of the central air-conditioning system further includes: a cold machine, and the input unit consumption and output unit consumption of the cold machine are obtained by the following method:

[0164] If the chiller is an air-cooled unit, then,

[0165] set up

[0166] ;

[0167] set up

[0168] ;

[0169] in: is the current electrical power of the air cooler; is the current cooling (heating) power of the air cooler;

[0170] If the chiller is a water-cooled unit, then,

[0171] set up

[0172] ;

[0173] set up

[0174] ;

[0175] in:

[0176] is the energy consumption rate delivered by the relevant cooling pump, that is, the energy consumption cost of the cooling heat delivered per unit time, and

[0177] ;

[0178] If the unit of output consumption is RMB / kWh, the unit of energy consumption rate is RMB / hour.

[0179] is the sum of the cooling powers delivered by the associated cooling pumps, and

[0180] ;

[0181] is the current electrical power of the water cooling unit; is the current cooling (heating) power of the water-cooling unit; and

[0182] .

[0183] Specifically, Figure 2Taking the principle block diagram of the central air-conditioning cold and hot source water system shown as an example, for cold machine 1, the relevant cooling pump is cooling pump 1; for cold machine 2, the relevant cooling pumps are cooling pump 2 and cooling pump 3.

[0184] In this embodiment, the equipment on the supply side of the central air-conditioning system further includes: a boiler, and the input unit consumption and output unit consumption of the boiler are obtained by the following method:

[0185] If the boiler is a conventional boiler, then,

[0186] set up

[0187] ;

[0188] set up

[0189] ;

[0190] in: is the current energy consumption of the boiler; is the current energy price; is the current heating power of the boiler;

[0191] If the boiler is a heat storage boiler and the boiler is in the heat storage state, then,

[0192] set up

[0193] ;

[0194] set up

[0195] ;

[0196] in: The cost of heat storage energy consumption in the last few minutes (e.g. 10 minutes); is the total amount of heat storage in the corresponding time period;

[0197] If the boiler is a heat storage boiler, and the boiler releases heat while storing heat, then,

[0198] set up

[0199] ;

[0200] set up

[0201] ;

[0202] in: The cost of heat storage energy consumption in the last few minutes (e.g. 10 minutes); is the total amount of heat storage in the corresponding time period; is the total amount of heat released in the corresponding time period;

[0203] If the boiler is a heat storage boiler and the boiler is in the heat release state, then,

[0204] set up

[0205] ;

[0206] set up

[0207] ;

[0208] in: is the total energy consumption cost of the most recent heat storage; is the most recent total heat storage amount; It is the total amount of heat released in the most recent heat storage process.

[0209] In this embodiment, the equipment on the supply side of the central air-conditioning system further includes: a cold storage device, and the input unit consumption and output unit consumption of the cold storage device are obtained by the following method:

[0210] If the cold storage equipment is in the cold (ice) storage stage, then,

[0211] set up

[0212] ;

[0213] set up

[0214] ;

[0215] If the cold storage equipment is in the cooling (melting) stage, then,

[0216] set up

[0217] ;

[0218] set up

[0219] ;

[0220] in: Energy consumption rate delivered for the relevant cold storage water pumps; The total cooling power delivered by the related cold storage water pumps; is the total energy consumption cost of the most recent cold (ice) storage; The total amount of cold (ice) stored most recently;

[0221] and

[0222] ;as well as

[0223] .

[0224] In this embodiment, the equipment on the supply side of the central air conditioning system further includes: a refrigeration pump and a heating pump, and the input unit consumption and output unit consumption of the refrigeration pump and the heating pump are obtained in the same way, that is, the input unit consumption and output unit consumption of the refrigeration pump are obtained by the following method:

[0225] set up

[0226] ;

[0227] set up

[0228] ;

[0229] in: Energy consumption rates delivered for relevant chillers and boilers; is the sum of the output power of the relevant chillers and boilers; is the current electrical power of the cooling water pump; The total cooling / heating power of the relevant chillers and boilers;

[0230] and

[0231] ;as well as

[0232] .

[0233] Specifically, Figure 2 Taking the central air conditioning cold and hot source water system principle block diagram as an example, for heating pump 1, the related boilers are boiler 1 and boiler 2, and for refrigeration pump 1, the related chiller is chiller 1.

[0234] In this embodiment, the equipment on the supply side of the central air conditioning system further includes: a heat exchanger, and the input unit consumption and output unit consumption of the heat exchanger are obtained by the following method:

[0235] set up

[0236] ;

[0237] set up

[0238] ;

[0239] in:

[0240] is the energy consumption rate delivered by the relevant upstream pump, and

[0241] ;

[0242] is the sum of the cooling heat power delivered by the relevant upstream pumps, and

[0243] .

[0244] In this embodiment, the equipment on the supply side of the central air conditioning system further includes: a water collector and a water distributor. The present invention regards the water collector and a water distributor as one device, and the input unit consumption and output unit consumption of the water collector and a water distributor are obtained by the following method:

[0245] set up

[0246] ;

[0247] set up

[0248] ;

[0249] in:

[0250] is the energy consumption rate delivered by the relevant upstream pump, and

[0251] ;

[0252] is the sum of the cooling heat power delivered by the relevant upstream pumps, and

[0253] ;

[0254] The sum of the cooling and heating power output of each branch on the secondary side; and

[0255] .

[0256] Specifically, Figure 2 Taking the principle block diagram of the central air-conditioning cold and hot source water system shown as an example, the relevant upstream pumps of the water collector and distributor in this embodiment include heating pump 1, heating pump 2, heating pump 3 and refrigeration pump 1, refrigeration pump 2, refrigeration pump 3.

[0257] In this embodiment, the equipment on the supply side of the central air conditioning system further includes: a secondary pump, and the input unit consumption and output unit consumption of the secondary pump are obtained by the following method:

[0258] set up

[0259] ;

[0260] set up

[0261] ;

[0262] in: The refrigeration heat power delivered by the secondary pump; is the current electrical power of the water pump; and

[0263] .

[0264] In this embodiment, the air conditioning area of ​​the central air conditioning system ( Figure 2 The input unit consumption and output unit consumption of Building A or Building B in the figure are obtained by the following method:

[0265] If there is no secondary pump in the air-conditioned area, then,

[0266] set up

[0267] ;

[0268] set up

[0269] ;

[0270] If there is a secondary pump in the air-conditioned area, then,

[0271] set up

[0272] ;

[0273] set up

[0274] ;

[0275] in: Energy consumption rate delivered for the associated secondary pump; The sum of the cooling and heating powers delivered by the relevant secondary pumps;

[0276] and

[0277] .

[0278] Specifically, the input unit consumption and output unit consumption of each device are displayed by the host computer, for example, but not limited to, the input unit consumption and output unit consumption of each device are displayed near the icon representing each device in the principle block diagram of the central air conditioning cold and hot source water system, such as Figure 2 As shown, the input and output unit consumption of all devices can be displayed at the same time, and the input and output unit consumption of one or more devices can be displayed as needed.

[0279] Specifically, the method of displaying the input unit consumption and output unit consumption of each device through the upper computer is also, for example but not limited to, displaying the input and output unit consumption of each device in a separate parameter list of each device, so that users can directly observe the transfer of cooling / heat unit consumption between various devices, so that operating personnel can intuitively and in detail understand the composition and origin of cooling / heat unit consumption.

[0280] Specifically, the present invention displays the input unit consumption and output unit consumption of each device through the host computer, so that the user can observe the change of unit consumption at different time points, and can also make the input unit consumption and output unit consumption of each device into a histogram, such as Figure 3 As shown, the horizontal axis represents the frequency percentage of different values ​​appearing in history, and the vertical axis represents the different values ​​appearing in history. At the same time, the current value is displayed in the histogram through arrows, which is convenient for operators to evaluate the energy efficiency level of various parts of the system.

[0281] Example 2

[0282] Based on Example 1, this Example 2 is Figure 2 The central air conditioning cold and hot source water system principle block diagram shown in the figure is used as an example to illustrate the beneficial effect of evaluating the energy efficiency level of the central air conditioning cold and hot source through the input unit consumption and output unit consumption of each device:

[0283] 1) By comparing the output unit consumption of each device at the output end of the subsystem, the current efficiency of different subsystems can be evaluated, which helps operators to directly adjust the cooling / heating of different subsystems.

[0284] For example: the operator can compare the output unit consumption of refrigeration pump 1, refrigeration pump 2 and refrigeration pump 3, which correspond to the efficiency of the subsystems of chillers 1, 2 and 3 respectively. If the output unit consumption data of each chiller is 0.15 yuan / kWh, 0.19 yuan / kWh and 0.17 yuan / kWh, the operator can increase the cooling capacity of chiller 1 and reduce the cooling capacity of chillers 2 and 3 at the same time.

[0285] 2) By comparing the input and output power consumption of each level of equipment in the same subsystem and comparing it with the same level equipment in other subsystems, the unfavorable links in the energy efficiency of this subsystem can be found.

[0286] For example, if a user intends to improve the efficiency of the subsystem where chillers 2 and 3 are located, he finds that the input unit consumption of cooling pumps 2 and 3 is 1 yuan / MWh, while the input unit consumption of cooling pump 1 is 0.8 yuan / MWh. This difference actually reflects that the heat dissipation efficiency of the cooling towers related to chillers 2 and 3 is lower than that of the cooling towers related to chiller 1. Based on this situation, the operator can try to adjust the fan operating parameters of cooling towers 2 and 3 or the operating parameters of the corresponding cooling pumps, or modify the cooling towers, so as to accurately reduce the cooling unit consumption.

[0287] 3) By comparing the input and output unit consumption of equipment at each level in different subsystems, it can help operators improve their operating level.

[0288] For example: Assume that chiller 2 and chiller 3 are of the same model, have similar current load levels, share a cooling water system, and have the same chiller pump model and are both variable frequency. After the operator sets the frequency of chiller pump 2 to 50 Hz and the frequency of chiller pump 3 to 40 Hz, it is found that the output unit consumption of chiller pump 2 and chiller pump 3 is 0.19 yuan / kWh and 0.17 yuan / kWh respectively. Based on this difference, the operator can be guided to reduce the frequency of chiller pump 2 to 40 Hz to achieve the purpose of reducing the operating unit consumption. In other words, intuitive parameter comparison helps guide the operator to adopt a more economical operating method.

[0289] 4) The input and output unit consumption of cold / ice storage equipment can directly reflect the benefits of cold or ice storage. By comparing the output unit consumption of the output end of the cooling or ice melting subsystem (cooling water pump or ethylene glycol pump) with the output unit consumption of the output end of other subsystems, it is helpful to reasonably use different subsystems and improve the benefits of cold (ice) storage.

[0290] 5) Understanding the input unit consumption of the air-conditioned area, especially the real-time cooling unit consumption during overtime hours, will help to formulate a more reasonable billing plan.

[0291] 6) For air conditioning cold and heat sources with multiple energy types, the difference in unit consumption of cooling and heating of subsystems using different energy types can be intuitively understood, which facilitates the reasonable allocation of their loads.

[0292] Example 3

[0293] Based on Example 1, this Example 3 provides a visualization system for the energy efficiency level of cold and heat sources of central air conditioning, including: a host computer, a host computer and a data acquisition device; the data acquisition device is suitable for collecting input unit consumption and output unit consumption data of several devices located on the supply side of the central air conditioning system and the air-conditioned areas, and sending them to the host computer; and the host computer is suitable for displaying the input unit consumption and output unit consumption of each device and the air-conditioned area.

[0294] Specifically, the method for obtaining the input unit consumption and output unit consumption of each device and air-conditioning area refers to the description in Example 1, which will not be repeated here.

[0295] In summary, this systematic visualization method for displaying the energy efficiency level of central air-conditioning cold and heat sources obtains the input unit consumption and output unit consumption of each device on the supply side of the central air-conditioning system and the air-conditioned area, and then displays the input unit consumption and output unit consumption of each device through the host computer, so as to evaluate the energy efficiency level of central air-conditioning cold and heat sources through the input unit consumption and output unit consumption of each device, thereby overcoming the defect that the current evaluation of the energy efficiency level of central air-conditioning cold and heat sources only evaluates the equipment itself and ignores the mutual influence of energy efficiency between equipment.

[0296] The various device components selected in this application are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0297] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0298] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A method for systematically displaying the energy efficiency level of central air conditioning cold and heat sources, characterized in that: include: Obtain the input unit consumption and output unit consumption of each device and air-conditioning area on the supply side of the central air-conditioning system through data acquisition equipment; The input unit consumption is the cost per unit of cooling / heating received by the device, and the output unit consumption is the cost per unit of cooling / heating sent by the device to the user side; as well as Send the input unit consumption and output unit consumption of each device to a host computer, and display the input unit consumption and output unit consumption of each device through the host computer; The input unit consumption and output unit consumption of each equipment include: the input unit consumption and output unit consumption of cooling tower, the input unit consumption and output unit consumption of cooling pump, the input unit consumption and output unit consumption of chiller, the input unit consumption and output unit consumption of boiler, the input unit consumption and output unit consumption of cold storage equipment, the input unit consumption and output unit consumption of freezing pump, the input unit consumption and output unit consumption of heating pump, the input unit consumption and output unit consumption of heat exchanger, the input unit consumption and output unit consumption of manifold and distributor, and the input unit consumption and output unit consumption of secondary pump; The input unit consumption and output unit consumption of the air-conditioning area of ​​the central air-conditioning system are obtained by the following method: If there is no secondary pump in the air-conditioned area, then, set up ； set up ； If there is a secondary pump in the air-conditioned area, then, set up ； set up ； in: Energy consumption rate delivered for the associated secondary pump; The sum of the cooling and heating powers delivered by the relevant secondary pumps; and 。 2. The method for systematically displaying the energy efficiency level of central air-conditioning cold and heat sources according to claim 1 is characterized in that: The equipment on the supply side of the central air conditioning system includes: cooling tower, and the input unit consumption and output unit consumption of the cooling tower are obtained by the following method: set up ； set up ； in: is the current electrical power of the cooling tower; is the current electricity price; is the current heat exchange power of the cooling tower.

3. The method for systematically displaying the energy efficiency level of central air-conditioning cold and heat sources according to claim 2 is characterized in that: The equipment on the supply side of the central air conditioning system also includes: a cooling pump, and the input unit consumption and output unit consumption of the cooling pump are obtained by the following method: set up ； set up ； in: is the sum of the current electrical power of all relevant cooling towers; is the sum of the current heat transfer powers of all relevant cooling towers; is the current electrical power of the cooling pump; and 。 4. The method for systematically displaying the energy efficiency level of central air-conditioning cold and heat sources according to claim 3 is characterized in that: The equipment on the supply side of the central air conditioning system also includes: a chiller, and the input unit consumption and output unit consumption of the chiller are obtained by the following method: If the chiller is an air-cooled unit, then, set up ； set up ； in: is the current electrical power of the air cooler; is the current cooling / heating power of the air cooler; If the chiller is a water-cooled unit, then, set up ； set up ； in: is the energy consumption rate delivered by the relevant cooling pump, that is, the energy consumption cost of the cooling heat delivered per unit time, and ； If the unit of output consumption is RMB / kWh, the unit of energy consumption rate is RMB / hour; is the sum of the cooling powers delivered by the associated cooling pumps, and ； is the current electrical power of the water cooling unit; is the current cooling / heating capacity of the water-cooling unit; and 。 5. The method for systematically displaying the energy efficiency level of central air-conditioning cold and heat sources according to claim 4 is characterized in that: The equipment on the supply side of the central air conditioning system also includes: boiler, and the input unit consumption and output unit consumption of the boiler are obtained by the following method: If the boiler is a conventional boiler, then, set up ； set up ； in: is the current energy consumption of the boiler; is the current energy price; is the current heating power of the boiler; If the boiler is a heat storage boiler and the boiler is in the heat storage state, then, set up ； set up ； in: The energy cost of storing heat for the last few minutes; is the total amount of heat storage in the corresponding time period; If the boiler is a heat storage boiler, and the boiler releases heat while storing heat, then, set up ； set up ； in: The energy cost of storing heat for the last few minutes; is the total amount of heat storage in the corresponding time period; is the total amount of heat released in the corresponding time period; If the boiler is a heat storage boiler and the boiler is in the heat release state, then, set up ； set up ； in: is the total energy consumption cost of the most recent heat storage; is the most recent total heat storage amount; It is the total amount of heat released in the most recent heat storage process.

6. The method for systematically displaying the energy efficiency level of central air-conditioning cold and heat sources according to claim 5 is characterized in that: The equipment on the supply side of the central air conditioning system also includes: cold storage equipment, and the input unit consumption and output unit consumption of the cold storage equipment are obtained by the following method: If the cold storage equipment is in the cold storage / ice storage stage, then, set up ； set up ； If the cold storage equipment is in the cooling / melting stage, then, set up ； set up ； in: Energy consumption rate delivered to the relevant cold storage water pumps; The total cooling power delivered by the related cold storage water pumps; The total energy cost of the most recent cold / ice storage; The most recent total amount of cold / ice storage; and ； 。 7. The method for systematically displaying the energy efficiency level of central air-conditioning cold and heat sources according to claim 6 is characterized in that: The equipment on the supply side of the central air conditioning system also includes: a refrigeration pump and a heating pump, and the input unit consumption and output unit consumption of the refrigeration pump and the heating pump are obtained in the same way, that is, the input unit consumption and output unit consumption of the refrigeration pump are obtained by the following method: set up ； set up ； in: Energy consumption rates delivered for relevant chillers and boilers; is the sum of the output power of the relevant chillers and boilers; is the current electrical power of the cooling water pump; is the sum of the cooling / heating power of the relevant chillers and boilers; and ;as well as 。 8. The method for visualizing the energy efficiency level of central air-conditioning cold and heat sources according to claim 7 is characterized in that: The equipment on the supply side of the central air conditioning system also includes: a heat exchanger, and the input unit consumption and output unit consumption of the heat exchanger are obtained by the following method: set up ； set up ； in: is the energy consumption rate delivered by the relevant upstream pump, and ； is the sum of the cooling heat power delivered by the relevant upstream pumps, and 。 9. The method for systematically displaying the energy efficiency level of central air-conditioning cold and heat sources according to claim 8 is characterized in that: The equipment on the supply side of the central air conditioning system also includes: a water collector and a water distributor, and the input unit consumption and output unit consumption of the water collector and a water distributor are obtained by the following method: set up ； set up ； in: is the energy consumption rate delivered by the relevant upstream pump, and ； is the sum of the cooling heat power delivered by the relevant upstream pumps, and ； is the sum of the cooling and thermal power output of each branch on the secondary side; and 。 10. The method for visualizing the energy efficiency level of central air-conditioning cold and heat sources according to claim 9, characterized in that: The equipment on the supply side of the central air conditioning system also includes: a secondary pump, and the input unit consumption and output unit consumption of the secondary pump are obtained by the following method: set up ； set up ； in: The refrigeration heat power delivered by the secondary pump; is the current electrical power of the water pump; and 。 11. A visualization system for the energy efficiency level of central air conditioner cold and heat sources using the visualization method for systematically displaying the energy efficiency level of central air conditioner cold and heat sources as described in any one of claims 1 to 10, characterized in that: Including: host computer and data acquisition equipment; The data acquisition device is suitable for collecting input unit consumption and output unit consumption data of several devices located on the supply side of the central air-conditioning system and the air-conditioning area, and sending them to the host computer; as well as The host computer is suitable for displaying the input unit consumption and output unit consumption of each device and air-conditioning area.

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