Fluorine pump air conditioner on-line real-time energy-saving evaluation system and method

Abstract

The invention discloses a fluorine pump air conditioner online real-time energy-saving evaluation system and method, and the method comprises the following steps: collecting an operation mode sign, real-time power, temperature deviation, frequency converter working frequency and air volume of a fluorine pump air conditioner through an energy-saving evaluation data collector; the frequency conversion energy-saving coefficient of the fluorine pump air conditioner is calculated through the operation mode mark, the frequency converter working frequency and the air volume; calculating mode energy-saving coefficients of the fluorine pump air conditioner in different modes by using the operation mode mark and fluorine pump rated power, compressor rated power, outer fan rated power and mixed mode power in the fluorine pump air conditioner; and performing energy-saving evaluation by utilizing the frequency conversion energy-saving coefficient of the fluorine pump air conditioner, the mode energy-saving coefficient of the fluorine pump air conditioner and the real-time power. The range of the energy-saving evaluation index is 0-100%, the larger the value is, the better the energy-saving effect is, and the value is simple, clear, visual and easy to understand, can be used for guiding energy-saving control of the fluorine pump air conditioner, and is beneficial to popularization of a novel energy-saving air conditioner.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy-saving evaluation, and particularly relates to an online real-time energy-saving evaluation system and method for a fluorine pump air conditioner. Background Art

[0002] The fluorine pump air conditioner mainly includes two refrigeration cycle systems, namely a compression refrigeration cycle and a fluorine pump refrigeration cycle, and is mainly composed of four parts: a compressor, a fluorine pump, an external fan, and an EEV. It has four operating modes: fluorine pump mode, compressor mode, ventilation mode, and mixed mode. The fluorine pump air conditioner has better power-saving ability than traditional air conditioners, and using this type of air conditioner meets the policy requirements of national energy conservation and emission reduction. Therefore, it is widely used in data centers and offshore platforms.

[0003] Due to its complex structure, its energy-saving evaluation is complex. Therefore, there is a lack of an online real-time evaluation method for its energy-saving ability in the prior art, resulting in an unintuitive, non-specific, and unconvincing evaluation of its energy conservation and emission reduction value. Therefore, an online real-time quantitative energy-saving evaluation of the fluorine pump air conditioner is very necessary. Summary of the Invention

[0004] The problem to be solved by the present invention is to provide an online real-time energy-saving evaluation system and method for a fluorine pump air conditioner, which is simple, effective, requires less prior knowledge, is easy to calculate, and has no impact on the normal operation of the actual fluorine pump air conditioner system.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: an online real-time energy-saving evaluation method for a fluorine pump air conditioner, including the following steps

[0006] S1: Collect the operation mode flag λ(t), real-time power P(t), temperature deviation T e , inverter operating frequency f(t), and air volume Q(t) of the fluorine pump air conditioner through an energy-saving evaluation data collector;

[0007] S2: Calculate the variable-frequency energy-saving coefficient k j1 (t) of the fluorine pump air conditioner by using the operation mode flag λ(t), the inverter operating frequency f(t), and the air volume Q(t);

[0008] S3: Calculate the mode energy-saving coefficient k f of the fluorine pump air conditioner in different modes by using the operation mode flag λ(t), the rated power P y of the fluorine pump, the rated power P w of the compressor, the rated power P h of the external fan, and the power P j2 (t) of the mixed mode;

[0009] S4: Use the variable-frequency energy-saving coefficient k j1, the mode energy-saving coefficient k j2 and the real-time power P(t) are used for energy-saving evaluation.

[0010] Further, in S1, the operation mode flag λ(t) is calculated by the following formula

[0011]

[0012] Further, in S2, the variable-frequency energy-saving coefficient k j1 (t) is calculated

[0013]

[0014] In the formula, f N is the rated electrical frequency, and l(t) is the known power-saving calculation coefficient of the flow rate.

[0015] Further, the calculation formula of the power-saving calculation coefficient l(t) is as follows

[0016]

[0017] In the formula, Q N is the rated air volume.

[0018] Further, the mode energy-saving coefficient k j2 (t) in S3 is calculated by the following formula:

[0019]

[0020] Further, in S4, the following formula is used for energy-saving evaluation:

[0021]

[0022] Where: t is the moment of evaluation of the fluorine pump air conditioner; ΔT is the sampling time of energy-saving evaluation; t / ΔT is the number of samples taken in the evaluation section; η(t) is the power-saving rate of the energy-saving evaluation index; k j1 (t i ) is the variable-frequency energy-saving coefficient of the fluorine pump air conditioner in the i-th sampling section; k j2 (t i ) is the mode energy-saving coefficient of the fluorine pump air conditioner in the i-th sampling section; P(t i ) is the measured active power of the fluorine pump air conditioner in the i-th sampling section.

[0023] Furthermore, the present invention also provides an online real-time energy-saving evaluation system for a fluorine pump air conditioner, which utilizes the above-mentioned online real-time energy-saving evaluation method for a fluorine pump air conditioner, and includes an energy-saving evaluation data collector, an energy-saving coefficient calculator, and an energy-saving evaluation calculator. The energy-saving evaluation data collector, the energy-saving coefficient calculator, and the energy-saving evaluation calculator are connected in series in sequence. The energy-saving coefficient calculator includes a variable-frequency energy-saving coefficient calculator and a mode energy-saving coefficient calculator, and the variable-frequency energy-saving coefficient calculator and the mode energy-saving coefficient calculator are connected in parallel. The energy-saving evaluation data collector collects the operation mode flag, the real-time power of the air conditioner, and the frequency data of the inverter operation of the fluorine pump air conditioner, and sends them to the energy-saving coefficient calculator to calculate the variable-frequency energy-saving coefficient and the mode energy-saving coefficient, and perform energy-saving evaluation based on the fluorine pump air conditioner energy-saving evaluation calculator.

[0024] Furthermore, the present invention also provides a device that runs the above data processing method.

[0025] Furthermore, the present invention also provides a device, including a memory, a processor, and an algorithm stored in the memory and executable on the processor. When the processor executes the computer program, the above data processing method is implemented.

[0026] Furthermore, the present invention also provides a computer-readable storage medium, which stores a computer algorithm. When the computer algorithm is executed by a processor, the above data processing is implemented.

[0027] The advantages and positive effects of the present invention are:

[0028] The range of the energy-saving evaluation index of the present invention is between 0 and 100%. The larger the value, the better the energy-saving effect. This value is simple, clear, intuitive, and easy to understand, and can be used to guide the energy-saving control of fluorine pump air conditioners, which is conducive to the promotion of new energy-saving air conditioners. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is the overall flow schematic diagram of the method embodiment of the present invention.

[0030] Figure 2 is the overall structural schematic diagram of the system embodiment of the present invention.

[0031] Figure 3 is the real-time operation mode flag curve diagram of the specific embodiment of the present invention.

[0032] Figure 4 is the real-time active power curve diagram of the operation of the specific embodiment of the present invention.

[0033] Figure 5 is the real-time output frequency curve diagram of the inverter of the specific embodiment of the present invention.

[0034] Figure 6 It is the real-time frequency conversion energy-saving coefficient curve graph of the specific embodiment of the present invention.

[0035] Figure 7 It is the real-time row mode energy-saving coefficient curve graph of the specific embodiment of the present invention.

[0036] Figure 8 It is the real-time energy-saving rate curve graph of the specific embodiment of the present invention. Specific embodiments

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] The following further describes the embodiments of the present invention with reference to the accompanying drawings:

[0039] As Figure 1 shown, an online real-time energy-saving evaluation method for a fluorine pump air conditioner includes the following steps.

[0040] S1: Collect the operation mode flag λ(t), real-time power P(t), temperature deviation T e , frequency of the frequency converter f(t), and air volume Q(t) of the fluorine pump air conditioner through an energy-saving evaluation data collector. Specifically, the operation mode flag λ(t) is calculated by the following formula 1.

[0041]

[0042] S2: Calculate the frequency conversion energy-saving coefficient k j1 (t) of the fluorine pump air conditioner by using the operation mode flag λ(t), frequency of the frequency converter f(t), and air volume Q(t). Specifically, the frequency conversion energy-saving coefficient k j1 (t) of the fluorine pump air conditioner is calculated by the following formula 2.

[0043]

[0044] In the formula, f N is the rated electrical frequency, and l(t) is the power-saving calculation coefficient with known flow rate.

[0045] Among them, the calculation formula of the power-saving calculation coefficient l(t) with known flow rate is as follows.

[0046]

[0047] In the formula, Q N is the rated air volume.

[0048] S3: Using the operation mode flag λ(t), the rated power P of the refrigerant pump in the refrigerant pump air conditioner f , the rated power P of the compressor y , the rated power P of the external fan w and the hybrid mode power P h , calculate the mode energy-saving coefficient k j2 (t) of the refrigerant pump air conditioner in different modes. Specifically, the calculation formula for the mode energy-saving coefficient k j2 (t) of the refrigerant pump air conditioner is as follows:

[0049]

[0050] S4: Using the variable-frequency energy-saving coefficient k j1 of the refrigerant pump air conditioner, the mode energy-saving coefficient k j2 of the refrigerant pump air conditioner and the real-time power P(t), conduct an energy-saving evaluation. Specifically, use Equation 5 for the energy-saving evaluation:

[0051]

[0052] Where: t is the time for evaluating the refrigerant pump air conditioner; ΔT is the sampling time for the energy-saving evaluation; t / ΔT is the number of samples taken in the evaluation section; η(t) is the power saving rate of the energy-saving evaluation index; k j1 (t i ) is the variable-frequency energy-saving coefficient of the refrigerant pump air conditioner in the i-th sampling section; k j2 (t i ) is the mode energy-saving coefficient of the refrigerant pump air conditioner in the i-th sampling section; P(t i ) is the measured active power of the refrigerant pump air conditioner in the i-th sampling section.

[0053] As Figure 2 shown, the present invention also provides an on-line real-time energy-saving evaluation system for a refrigerant pump air conditioner, including an energy-saving evaluation data collector, an energy-saving coefficient calculator, and an energy-saving evaluation calculator. The energy-saving evaluation data collector, the energy-saving coefficient calculator, and the energy-saving evaluation calculator are connected in series in sequence. The energy-saving coefficient calculator includes a variable-frequency energy-saving coefficient calculator and a mode energy-saving coefficient calculator. The variable-frequency energy-saving coefficient calculator and the mode energy-saving coefficient calculator are connected in parallel. The energy-saving evaluation data collector collects the operation mode flag, the real-time power of the air conditioner, and the frequency data of the inverter operation of the refrigerant pump air conditioner, and sends them to the energy-saving coefficient calculator to calculate the variable-frequency energy-saving coefficient and the mode energy-saving coefficient, and conducts an energy-saving evaluation based on the energy-saving evaluation calculator.

[0054] The following takes a specific embodiment as an example to specifically elaborate on the present invention:

[0055] The power of a certain refrigerant pump air conditioner in the compressor mode is P y = 14kw, and the hybrid mode is Ph = 6 kw, the fluorine pump mode P f = 2.5 kw, the ventilation mode P w = 1 kw, the air volume data is not collected. The specific implementation of the system and method is as follows:

[0056] The energy-saving evaluation data collector of this embodiment includes analog and digital input data acquisition boards, data acquisition connection lines, data conversion interfaces, and edge proxy controllers. The data such as Figure 3 the fluorine pump air conditioner operation mode flag λ(t) shown as Figure 4 the real-time power P(t) of the air conditioner shown as Figure 5 the frequency f(t) at which the frequency converter works shown as

[0057] are collected, filtered, and uploaded to the host computer.

[0058] Since the flow controller cannot be collected by this air conditioner, according to Formula 2, the variable-frequency energy-saving coefficient of the fluorine pump air conditioner at this time is:

[0059]

[0060] The variable-frequency energy-saving coefficient of the fluorine pump air conditioner calculated in real time is as shown in the appendix Figure 6 shown.

[0061] The energy-saving coefficient calculator for the fluorine pump air conditioner mode is calculated according to Formula 4 as follows:

[0062]

[0063] Its real-time calculation curve is as shown in the appendix Figure 7 shown.

[0064] In this embodiment, the sampling time ΔT is taken as 1 s. According to Formula 5, the energy-saving evaluation calculator for the fluorine pump air conditioner

[0065]

[0066] The online real-time evaluation index calculation and display of the fluorine pump air conditioner are as shown in the appendix Figure 8 shown.

[0067] The advantages and positive effects of the present invention are:

[0068] The range of the energy-saving evaluation index of the present invention is between 0 and 100%. The larger the value, the better the energy-saving effect. This value is simple, clear, intuitive, and easy to understand. It can be used to guide the energy-saving control of the fluorine pump air conditioner and is conducive to the promotion of new energy-saving air conditioners.

[0069] The above has described in detail an embodiment of the present invention, but the above content is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. Any equivalent changes and improvements made within the scope of the application of the present invention shall still fall within the scope covered by the patent of the present invention.

Claims

1. An online real-time energy-saving evaluation method for a fluorine pump air conditioner, characterized in that: including the following steps, S1: Collect the operation mode flag λ(t), real-time power P(t), temperature deviation T, operating frequency f(t) of the frequency converter, and air volume Q(t) of the fluorine pump air conditioner through the energy-saving evaluation data collector. e , operating frequency f(t) of the frequency converter, and air volume Q(t) of the fluorine pump air conditioner. S2: Calculate the variable - frequency energy - saving coefficient \(k(t)\) of the fluorine - pump air conditioner by using the operation - mode flag \(\lambda(t)\), the operating frequency \(f(t)\) of the frequency converter, and the air volume \(Q(t)\). j1 (t); S3: Using the operation mode flag λ(t), the rated power P of the refrigerant pump in the refrigerant pump air conditioner f , the rated power P of the compressor y , the rated power P of the external fan w and the hybrid mode power P h , calculate the mode energy saving coefficient k of the refrigerant pump air conditioner in different modes j2 (t); S4: Using the frequency conversion energy-saving coefficient k j1 , the mode energy-saving coefficient k j2 and the real-time power P(t) to conduct energy-saving evaluation.

2. The online real-time energy-saving evaluation method for a fluorine pump air conditioner according to claim 1, characterized in that: in S1, calculate the operation mode flag λ(t) through the following formula, 3. The online real-time energy-saving evaluation method for a fluorine pump air conditioner according to claim 1 or 2, characterized in that: The S2 calculates the frequency conversion energy-saving coefficient k through the following formula j1 (t), where f N is the rated electrical frequency, and l(t) is the power-saving calculation coefficient with known flow rate.

4. The online real-time energy-saving evaluation method for a fluorine pump air conditioner according to claim 3, wherein: the calculation formula of the power saving calculation coefficient l(t) is as follows, Where Q N is the rated air volume.

5. A real-time online energy-saving evaluation method for a fluorine pump air conditioner according to claim 1 or 2, characterized in that: The mode energy-saving coefficient k in S3 j2 (t) The calculation formula is as follows:

6. The online real-time energy-saving evaluation method for a fluorine pump air conditioner according to claim 1 or 2, characterized in that: in S4, the following formula is used for energy saving evaluation: Where: t is the time for evaluating the fluorine pump air conditioner; ΔT is the sampling time for energy-saving evaluation; t / ΔT is the sampling of the number of times adopted in the evaluation section; η(t) is the power-saving rate of the energy-saving evaluation index; k j1 (t i ) is the variable-frequency energy-saving coefficient of the fluorine pump air conditioner in the i-th sampling section; k j2 (t i ) is the mode energy-saving coefficient of the fluorine pump air conditioner in the i-th sampling section; P(t i ) is the measured active power of the fluorine pump air conditioner in the i-th sampling section.

7. An online real-time energy-saving evaluation system for a fluorine pump air conditioner, which uses the online real-time energy-saving evaluation method for a fluorine pump air conditioner according to any one of claims 1 to 6, characterized in that: including an energy saving evaluation data collector, an energy saving coefficient calculator and an energy saving evaluation calculator. The energy saving evaluation data collector, the energy saving coefficient calculator and the energy saving evaluation calculator are connected in series in sequence. The energy saving coefficient calculator includes a variable frequency energy saving coefficient calculator and a mode energy saving coefficient calculator. The variable frequency energy saving coefficient calculator and the mode energy saving coefficient calculator are connected in parallel. The energy saving evaluation data collector collects the operation mode flag, the real-time power of the air conditioner and the frequency data of the inverter working of the fluorine pump air conditioner, and sends them to the energy saving coefficient calculator to calculate the variable frequency energy saving coefficient and the mode energy saving coefficient, and the energy saving evaluation is carried out according to the fluorine pump air conditioner energy saving evaluation calculator.

8. A device, characterized in that: Run the data processing method according to any one of claims 1 to 6.

9. An apparatus, comprising a memory, a processor, and an algorithm stored in the memory and executable on the processor, wherein: When the processor executes the computer program, it implements the data processing method according to any one of claims 1 to 6.

10. A computer-readable storage medium storing a computer algorithm, characterized in that, When the computer algorithm is executed by the processor, it implements the data processing according to any one of claims 1 to 6.

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