CN105041624A - Analysis method for energy-saving potential of air compressor system - Google Patents

Abstract

The invention discloses an analysis method for energy-saving potential of an air compressor system. The analysis method mainly comprises the following two steps: I, collecting operation monitoring data of the air compressor system; and II, computing the energy-saving potential of the air compressor system by analysis modeling from five aspects of manual startup and shutdown, incapacity of automatically stopping due to long-term unloading, unreasonable supply pressure, pipe network pressure loss and leakage, and air compressor system group control optimization, thereby providing direction and data support for enterprises to carry out air compressor system modifying, energy saving and consumption reducing. The analysis for the energy-saving potential promotes the strengthening of management for the air compressor system by the enterprises to certain extent; and by virtue of energy saving retransformation and management strengthening, the operation efficiency of the air compressor system of the enterprises is improved, energy loss and waste are reduced, and energy cost of the enterprises is reduced.

Description

A kind of analytical method of air compression system energy-saving potential

Technical field

The invention belongs to the energy saving of system analytical method technical field of energy-saving field of pneumatic, be specifically related to a kind of analytical method of air compression system energy-saving potential.

Background technique

Pressurized air is most widely used dynamic origin in modern industry production process, is responsible for as all pneumatic elements of factory, comprises the responsibility that various pneumatic valve provides source of the gas, also for factory's dust pelletizing system provides the dedust power of high-efficiency cleaning.Simultaneously it be also most of type of production industrial enterprises energy consumption larger carry can working medium, and along with the increase of gas products pressure, the energy manufactured spent by it is more.Industrial enterprise's typical compression air compression system is made up of capital equipments such as air purification processing equipment, air compressor, dryer, cooling system, gas holder, transmission pipeline network, gas equipments, is that pressurized air produced by raw material with air.The energy of most equipment operation demand is electric energy, and according to statistics, electric power consumption accounts for 5% ~ 20% of the whole power consumption of enterprise, and the power saving of air compression system comes into one's own gradually in industry energy conservation work.The air compression system of major part enterprise of China is as processing conversion links; its energy utilization rate is on the low side; ubiquity air compressor hand switch machine, add frequent, the long-time unloading of unloading cannot unreasonable, the ductwork pressure loss of autostop, pressurized air supply pressure with leak, the problem such as air gun nozzle poor efficiency and cooling water valve manually-operable, all affect the power consumption of air compression system.Therefore, the analytical method of a kind of quantity of energy for assessment of saving in air compression system running and energy-saving potential is provided to be very important.

Summary of the invention

The object of this invention is to provide a kind of analytical method of air compression system energy-saving potential of the energy-saving potential can assessed accurately in air compression system running.

For achieving the above object, the technical solution used in the present invention is, a kind of analytical method of air compression system energy-saving potential, described air compression system comprises several air compressors, air compressor is connected with gas holder, gas holder is connected with main pipeline, and main pipeline is connected with some gas equipments by some branch pipe(tube)s, and each branch pipe(tube) is provided with reduction valve on one end of main pipeline; Comprise Data Collection, energy-saving potential analysis modeling and calculate three steps; Data Collection: the data gathering the compressed-air actuated volume flowrate of each gas equipment in air compression system, each branch pipe(tube) pressurized air absolute pressure of the suction port of pressurized air absolute pressure, the air outlet place pressurized air absolute pressure of each branch pipe(tube), each branch pipe(tube), the installed power with gas time, air compressor of each gas equipment after reduction valve decompression, and the data calculating average time of air compressor no-load running, the average time of starting shooting in advance of air compression system, the average time of delaying shutdown;

Energy-saving potential analysis modeling:

Air compression system energy-saving potential Δ E,

$\mathrm{\ΔE}=\underset{i=1}{\overset{5}{\mathrm{\Σ}}}\mathrm{\Δ}{E}_i=\mathrm{\Δ}{E}_1+\mathrm{\Δ}{E}_2+{\mathrm{\ΔE}}_3+\mathrm{\Δ}{E}_4+\mathrm{\Δ}{E}_5;$

Wherein, Δ E ₁for air compressor hand switch machine energy-saving potential computation model

$\mathrm{\Δ}{E}_1=\underset{j=1}{\overset{n}{\mathrm{\Σ}}}[(P_j\×t_1)+(P_j\×t_2\×k)]\×0.1229\×{10}^{-3},$ In formula,

P _jfor jth platform air compressor installed power, unit kW;

T ₁for the average time that air compression system is started shooting in advance, unit h;

T ₂for the average time of air compression system delaying shutdown, unit h;

K is unloaded power consumption coefficient, power consumption ratio when namely air compressor is unloaded;

Wherein, Δ E ₂for the long-time zero load of air compression system cannot the energy-saving potential computation model of autostop

$\mathrm{\Δ}{E}_2=\underset{j=1}{\overset{n}{\mathrm{\Σ}}}(P_j\×t_3\×k)\×0.1229\×{10}^{-3},$ In formula

P _jfor jth platform air compressor installed power, unit kW;

T ₃for the average time of air compression system no-load running, unit h;

K is unloaded power consumption coefficient, power consumption ratio when namely air compressor is unloaded;

Wherein, Δ E ₃for the energy-saving potential computation model of the unreasonable generation of air compression system pressurized air supply pressure

$\mathrm{\Δ}{E}_3=\underset{i=1}{\overset{I}{\mathrm{\Σ}}}60\×q_{\mathrm{vi}}\×(p_{0i}\×\ln \frac{p_{0i}}{p_{\mathrm{\α}}}-p_{1i}\×\ln \frac{p_{1i}}{p_{\mathrm{\α}}})\×t_i\×{10}^{-3}\×0.1229\×{10}^{-3},$ In formula,

Q _vi(wherein v non-variables, just represents the meaning of volume) is the volume flowrate of the air of i-th gas equipment compression used, unit L/h;

P _0ifor the branch pipe(tube) pressurized air absolute pressure after reduction valve reduces pressure be connected with i-th gas equipment, units MPa;

P _1ifor the air outlet place pressurized air absolute pressure of branch pipe(tube) be connected with i-th gas equipment, units MPa;

P _α(α non-variables only play differentiation effect) is BAP Barometric Absolute Pressure, units MPa;

T _ibe i-th gas equipment use the gas time, unit h;

Wherein, Δ E ₄for the energy-saving potential computation model that the loss of air compression system ductwork pressure produces with leakage

$\mathrm{\Δ}{E}_4=\underset{i=1}{\overset{I}{\mathrm{\Σ}}}{q}_{\mathrm{vi}}\×(p_{2i}\×\ln \frac{p_{2i}}{p_{\mathrm{\α}}}-p_{1i}\×\ln \frac{p_{1i}}{p_{\mathrm{\α}}})\×t_i\×{10}^{-3}\×0.1229\×{10}^{-3},$ In formula,

Q _vibe the volume flowrate of the air of i-th gas equipment compression used, unit L/h;

P _2ifor the suction port place pressurized air absolute pressure of branch pipe(tube) be connected with i-th gas equipment, units MPa;

P _1ifor the air outlet place pressurized air absolute pressure of branch pipe(tube) be connected with i-th gas equipment, units MPa;

T _ibe i-th gas equipment use the gas time, unit h.

Wherein, Δ E ₅for air compression system team control optimisation technique energy-saving potential computation model:

ΔE ₅＝E×4％；

In formula, E is air compression system power consumption total amount;

Calculate: utilize $\mathrm{\ΔE}=\underset{i=1}{\overset{5}{\mathrm{\Σ}}}\mathrm{\Δ}{E}_i=\mathrm{\Δ}{E}_1+\mathrm{\Δ}{E}_2+{\mathrm{\ΔE}}_3+\mathrm{\Δ}{E}_4+\mathrm{\Δ}{E}_5$ Obtain air compression system energy-saving potential Δ E.Described unloaded power consumption COEFFICIENT K is 30%.

The beneficial effect that the present invention produces, by the foundation of air compression system energy-saving potential analytical model, in conjunction with the actual air compression system service data of industrial enterprise, by calculating potential amount of energy saving corresponding to enterprise, finally exports analysis result.The analysis management of promoting enterprise reinforcement to air compression system to a certain extent of energy-saving potential, and by reducing energy consumption and tighten management, improve compressor operation efficiency, reduce energy loss and waste, reduce enterprise energy cost.

Accompanying drawing explanation

Fig. 1 is the structural representation of air compression system in embodiment.

Embodiment

Below in conjunction with specific embodiment, the invention will be further described, but protection scope of the present invention is not limited thereto.

Embodiment 1

A kind of analytical method of air compression system energy-saving potential, described air compression system as shown in Figure 1, comprise several air compressors 1, air compressor 1 is connected with gas holder 2, gas holder 2 is connected with main pipeline 3, main pipeline 3 is connected with two gas equipments (gas equipment is not shown in FIG.) by two branch pipe(tube)s 4, and each branch pipe(tube) 4 is provided with reduction valve 5 on one end of main pipeline 3; The analytical method of air compression system energy-saving potential comprises Data Collection, energy-saving potential analysis modeling and calculates three steps;

Data Collection: the data gathering the compressed-air actuated volume flowrate of each gas equipment in air compression system, each branch pipe(tube) pressurized air absolute pressure of the suction port of pressurized air absolute pressure, the air outlet place pressurized air absolute pressure of each branch pipe(tube), each branch pipe(tube), the installed power with gas time, air compressor of each gas equipment after reduction valve decompression, and the data calculating average time of air compressor no-load running, the average time of starting shooting in advance of air compression system, the average time of delaying shutdown;

Energy-saving potential analysis modeling:

Air compression system energy-saving potential Δ E,

$\mathrm{\ΔE}=\underset{i=1}{\overset{5}{\mathrm{\Σ}}}\mathrm{\Δ}{E}_i=\mathrm{\Δ}{E}_1+\mathrm{\Δ}{E}_2+{\mathrm{\ΔE}}_3+\mathrm{\Δ}{E}_4+\mathrm{\Δ}{E}_5;$

Wherein, Δ E ₁for air compressor hand switch machine energy-saving potential computation model

$\mathrm{\Δ}{E}_1=\underset{j=1}{\overset{n}{\mathrm{\Σ}}}[(P_j\×t_1)+(P_j\×t_2\×k)]\×0.1229\×{10}^{-3},$ In formula,

P _jfor jth platform air compressor installed power, unit kW;

T ₁for the average time that air compression system is started shooting in advance, unit h;

T ₂for the average time of air compression system delaying shutdown, unit h;

K is unloaded power consumption coefficient, power consumption ratio when namely air compressor is unloaded, 30%;

Wherein, Δ E ₂for the long-time zero load of air compression system cannot the energy-saving potential computation model of autostop

$\mathrm{\Δ}{E}_2=\underset{j=1}{\overset{n}{\mathrm{\Σ}}}(P_j\×t_3\×k)\×0.1229\×{10}^{-3},$ In formula

P _jfor jth platform air compressor installed power, unit kW;

T ₃for the average time of air compression system no-load running, unit h;

K is unloaded power consumption coefficient, power consumption ratio when namely air compressor is unloaded, 30%;

Wherein, Δ E ₃for the energy-saving potential computation model of the unreasonable generation of air compression system pressurized air supply pressure

$\mathrm{\Δ}{E}_3=\underset{i=1}{\overset{I}{\mathrm{\Σ}}}60\×q_{\mathrm{vi}}\×(p_{0i}\×\ln \frac{p_{0i}}{p_{\mathrm{\α}}}-p_{1i}\×\ln \frac{p_{1i}}{p_{\mathrm{\α}}})\×t_i\×{10}^{-3}\×0.1229\×{10}^{-3},$ In formula,

Q _vibe the volume flowrate of the air of i-th gas equipment compression used, unit L/h;

P _0ifor the branch pipe(tube) pressurized air absolute pressure after reduction valve reduces pressure be connected with i-th gas equipment, units MPa;

P _1ifor the air outlet place pressurized air absolute pressure of branch pipe(tube) be connected with i-th gas equipment, units MPa;

P _αfor BAP Barometric Absolute Pressure, units MPa;

T _ibe i-th gas equipment use the gas time, unit h;

Wherein, Δ E ₄for the energy-saving potential computation model that the loss of air compression system ductwork pressure produces with leakage

$\mathrm{\Δ}{E}_4=\underset{i=1}{\overset{I}{\mathrm{\Σ}}}{q}_{\mathrm{vi}}\×(p_{2i}\×\ln \frac{p_{2i}}{p_{\mathrm{\α}}}-p_{1i}\×\ln \frac{p_{1i}}{p_{\mathrm{\α}}})\×t_i\×{10}^{-3}\×0.1229\×{10}^{-3},$ In formula,

Q _vibe the volume flowrate of the air of i-th gas equipment compression used, unit L/h;

P _2ifor the suction port place pressurized air absolute pressure of branch pipe(tube) be connected with i-th gas equipment, units MPa;

P _1ifor the air outlet place pressurized air absolute pressure of branch pipe(tube) be connected with i-th gas equipment, units MPa;

T _ibe i-th gas equipment use the gas time, h.

Wherein, Δ E ₅for air compression system team control optimisation technique energy-saving potential computation model:

ΔE ₅＝E×4％；

In formula, E is air compression system power consumption total amount;

Calculate: utilize $\mathrm{\ΔE}=\underset{i=1}{\overset{5}{\mathrm{\Σ}}}\mathrm{\Δ}{E}_i=\mathrm{\Δ}{E}_1+\mathrm{\Δ}{E}_2+{\mathrm{\ΔE}}_3+\mathrm{\Δ}{E}_4+\mathrm{\Δ}{E}_5$ Obtain air compression system energy-saving potential Δ E.

Air compression system in the present embodiment has air compressor 5, wherein the air compressor 3 of installed power 550kW, and aerogenesis pressure is respectively 2.4MPa; The air compressor of installed power 250kW 2, aerogenesis pressure is respectively 2.2MPa.Gas equipment is two, 1.9MPa is with the suction port place pressurized air absolute pressure of the branch pipe(tube) of the 1st, 2 dual-purpose gas equipment connection, 1.8MPa is with the 1st, 2 branch pipe(tube) that gas equipment is connected pressurized air absolute pressure after reduction valve reduces pressure, with the air outlet place pressurized air absolute pressure 1.8MPa of the 1st branch pipe(tube) that gas equipment is connected, with the air outlet place pressurized air absolute pressure 1.3MPa of the 2nd branch pipe(tube) that gas equipment is connected; 1st, the volume flowrate of the air of the compression that 2 gas equipments are used is 9196.8L/h, air compression system working time is 703h, the working time of two gas equipments is 703h, and find that the average time that air compression system is started shooting in advance is 5.6h, the average time of delaying shutdown is 8.9h.The average time that air compression system is in unloaded state and does not shut down is 5.2h.Calculate through energy-saving potential analysis modeling in the present embodiment, Δ E ₁for 2.19tce (1 ton of standard coal equivalent), Δ E ₂for 0.41tce, Δ E ₃for 1.3tce, Δ E ₄for 0.005tce, Δ E ₅for 7.43tce; Air compression system energy-saving potential Δ E is 11.335tce.

Claims (2)

1. the analytical method of an air compression system energy-saving potential, described air compression system comprises several air compressors, air compressor is connected with gas holder, gas holder is connected with main pipeline, main pipeline is connected with some gas equipments by some branch pipe(tube)s, each branch pipe(tube) is provided with reduction valve on one end of main pipeline, it is characterized in that: comprise Data Collection, energy-saving potential analysis modeling and calculate three steps;

Data Collection: the data gathering the compressed-air actuated volume flowrate of each gas equipment in air compression system, each branch pipe(tube) pressurized air absolute pressure of the suction port of pressurized air absolute pressure, the air outlet place pressurized air absolute pressure of each branch pipe(tube), each branch pipe(tube), the installed power with gas time, air compressor of each gas equipment after reduction valve decompression, and the data calculating average time of air compressor no-load running, the average time of starting shooting in advance of air compression system, the average time of delaying shutdown;

Energy-saving potential analysis modeling:

Air compression system energy-saving potential Δ E,

$\mathrm{\ΔE}=\underset{i=1}{\overset{5}{\mathrm{\Σ}}}{\mathrm{\ΔE}}_i={\mathrm{\ΔE}}_1+{\mathrm{\ΔE}}_2+{\mathrm{\ΔE}}_3+{\mathrm{\ΔE}}_4+{\mathrm{\ΔE}}_5;$

Wherein, Δ E ₁for air compressor hand switch machine energy-saving potential computation model

${\mathrm{\ΔE}}_1=\underset{j=1}{\overset{n}{\mathrm{\Σ}}}[(P_j\×t_1)+(P_j\×t_2\×k)]\×0.1229\×{10}^{-3},$ In formula,

P _jfor jth platform air compressor installed power, unit kW;

T ₁for the average time that air compression system is started shooting in advance, unit h;

T ₂for the average time of air compression system delaying shutdown, unit h;

K is unloaded power consumption coefficient, power consumption ratio when namely air compressor is unloaded;

Wherein, Δ E ₂for the long-time zero load of air compression system cannot the energy-saving potential computation model of autostop

${\mathrm{\ΔE}}_2=\underset{j=1}{\overset{n}{\mathrm{\Σ}}}(P_j\×t_3\×k)\×0.1229\×{10}^{-3},$ In formula

P _jfor jth platform air compressor installed power, unit kW;

T ₃for the average time of air compression system no-load running, unit h;

K is unloaded power consumption coefficient, power consumption ratio when namely air compressor is unloaded;

Wherein, Δ E ₃for the energy-saving potential computation model of the unreasonable generation of air compression system pressurized air supply pressure

${\mathrm{\ΔE}}_3=\underset{i=1}{\overset{I}{\mathrm{\Σ}}}60\×q_{\mathrm{vi}}\×(p_{0i}\×\ln \frac{p_{0i}}{p_{\mathrm{\α}}}-p_{1i}\×\ln \frac{p_{1i}}{p_{\mathrm{\α}}})\×t_i\×{10}^{-3}\×0.1229\×{10}^{-3},$ In formula,

Q _vibe the volume flowrate of the air of i-th gas equipment compression used, unit L/h;

P _0ifor the branch pipe(tube) pressurized air absolute pressure after reduction valve reduces pressure be connected with i-th gas equipment, units MPa;

P _1ifor the air outlet place pressurized air absolute pressure of branch pipe(tube) be connected with i-th gas equipment, units MPa;

P _αfor BAP Barometric Absolute Pressure, units MPa;

T _ibe i-th gas equipment use the gas time, unit h;

Wherein, Δ E ₄for the energy-saving potential computation model that the loss of air compression system ductwork pressure produces with leakage

${\mathrm{\ΔE}}_4=\underset{i=1}{\overset{I}{\mathrm{\Σ}}}\×q_{\mathrm{vi}}\×(p_{2i}\×\ln \frac{p_{2i}}{p_{\mathrm{\α}}}-p_{1i}\×\ln \frac{p_{1i}}{p_{\mathrm{\α}}})\×t_i\×{10}^{-3}\×0.1229\×{10}^{-3},$ In formula,

Q _vibe the volume flowrate of the air of i-th gas equipment compression used, unit L/h;

P _2ifor the suction port place pressurized air absolute pressure of branch pipe(tube) be connected with i-th gas equipment, units MPa;

P _1ifor the air outlet place pressurized air absolute pressure of branch pipe(tube) be connected with i-th gas equipment, units MPa;

T _ibe i-th gas equipment use the gas time, unit h.

Wherein, Δ E ₅for air compression system team control optimisation technique energy-saving potential computation model:

ΔE ₅＝E×4％；

In formula, E is air compression system power consumption total amount;

Calculate: utilize $\mathrm{\ΔE}=\underset{i=1}{\overset{5}{\mathrm{\Σ}}}{\mathrm{\ΔE}}_i={\mathrm{\ΔE}}_1+{\mathrm{\ΔE}}_2+{\mathrm{\ΔE}}_3+{\mathrm{\ΔE}}_4+{\mathrm{\ΔE}}_5$ Obtain air compression system energy-saving potential Δ E.

2. the analytical method of air compression system energy-saving potential as claimed in claim 1, it is characterized in that, described unloaded power consumption COEFFICIENT K is 30%.