CN107784388A - Heat collector area optimization method for adsorption-type solar seawater desalination system - Google Patents
Heat collector area optimization method for adsorption-type solar seawater desalination system Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/04—Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/14—Treatment of water, waste water, or sewage by heating by distillation or evaporation using solar energy
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- G06Q10/063—Operations research, analysis or management
- G06Q10/0631—Resource planning, allocation, distributing or scheduling for enterprises or organisations
- G06Q10/06315—Needs-based resource requirements planning or analysis
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/06—Electricity, gas or water supply
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/138—Water desalination using renewable energy
- Y02A20/142—Solar thermal; Photovoltaics
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/208—Off-grid powered water treatment
- Y02A20/212—Solar-powered wastewater sewage treatment, e.g. spray evaporation
Abstract
The present invention relates to a kind of heat collector area optimization method for adsorption-type solar seawater desalination system, including：Step S1：It is determined that the optimum angle of incidence of the solar thermal collector on installation ground；Step S2：The daily maximum effective area of solar thermal collector is determined according to day fresh water demand yield；Step S3：Under optimum angle of incidence, according to net profit in the areal calculation solar thermal collector lifetime of solar thermal collector daily maximum effective area and heat collector；Step S4：Solar thermal collector area optimizing is carried out, it is determined that making the optimal area of the solar thermal collector that net profit is maximum in lifetime.Compared with prior art, the invention provides being constraints based on day fresh water demand yield, the degree of accuracy for Solar use income is improved, and then improve the area-optimized degree of accuracy.
Description
Technical field
The present invention relates to field of seawater desalination, more particularly, to a kind of for adsorption-type solar seawater desalination system
Heat collector area optimization method.
Background technology
Shortage of fresh water is a great problem that mankind nowadays need to face jointly, and absorption type desalinization is as a kind of
Emerging desalination technology, the superpower adsorption capacity using some solid matters (such as silica gel, zeolite) to vapor, greatly
Amount absorbs aggregation normal temperature seawater steam, and then heat adsorbent by low-temperature heat source carries out desorption to vapor therein, together
When collect condensation fresh water, realize desalinization.Its generally have capacity usage ratio it is high, it is less demanding to raw water quality, to drive
Heat source temperature requires low advantage.
Suitable, environmental protection a low-temperature heat source is searched out, is the energy-saving potential for giving full play to absorption type seawater desalination system
Key.Solar energy because cleaning, it is abundant the characteristics of be widely used as the thermal source of desalinization, but utilizing solar energy
Shi Tongchang need to supplement other energy to ensure the stability of system operation.Have solar seawater desalination system at present to couple
Natural gas or earth source heat pump form composite heat power supply, and geothermal energy has also obtained more being widely applied.
Research currently for absorption type desalinization is very limited, although its energy input can be calculated theoretically,
But it is excessively cumbersome in engineer applied, and it is difficult to energy loss during accurate estimating system operation in pipeline, water pot.Therefore, mesh
Before there is scholar to propose with overall performance ratio (the ratio between the product of the latent heat of vaporization of fresh water yield and water and total primary energy consumption)
The energy consumption of absorption type desalinization is characterized, the heating demand for determination solar water heating system provides conveniently in this invention.
From energy-conserving and environment-protective, the angle of carbon emission is reduced, answers and as much as possible utilizes solar energy, i.e. solar thermal collector face
Product should be as big as possible.However, the cost of heat collector is still higher at present, proportion is big in system total cost, increases its area
System cost will necessarily be increased.Therefore in engineering project, solar thermal collector area should rationally be determined so that system
There is optimal economy.
The content of the invention
Inhaled it is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind is used for solar energy
The heat collector area optimization method of attached formula seawater desalination system.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of heat collector area optimization method for adsorption-type solar seawater desalination system, including：
Step S1：It is determined that the optimum angle of incidence of the solar thermal collector on installation ground；
Step S2：The daily maximum effective area of solar thermal collector is determined according to day fresh water demand yield；
Step S3：Under optimum angle of incidence, according to the area of solar thermal collector daily maximum effective area and heat collector
Calculate net profit in solar thermal collector lifetime；
Step S4：Solar thermal collector area optimizing is carried out, it is determined that making the solar energy heating that net profit is maximum in lifetime
The optimal area of device.
The optimum angle of incidence is to add up that the maximum inclination angle of solar energy can be obtained in 1 year.
The step S3 includes：
Step S31：Determine under optimum angle of incidence, calculate the gross earnings of solar thermal collector：
Ai=min (As,Amax,i)
Wherein：S is gross earnings, and n is the solar energy collector system life-span, and p aids in traditional energy source prices, HiFor i-th day too
The sun total amount of irradiation of unit area, A in positive energy heat collector planeiFor the solar thermal collector effective area of i-th day, ηcFor collection
The hot full-time collecting efficiency of device, and ηlFor pipeline and accumulation of heat water pot heat loss, AsFor the area of solar thermal collector, Amax,iFor i-th
The maximum effective area of its solar thermal collector；
Step S32：With reference to solar energy heat distribution system cost, net profit in the lifetime of solar thermal collector is calculated：
J=S-Z × (1+r)n
Wherein：J is the net profit that solar thermal collector is brought, and Z is the cost of solar energy collector system, and r is bank's profit
Rate.
The species of the auxiliary conventional energy resource includes fossil fuel, electric energy, bio-fuel.
The sun total amount of irradiation of unit area determines according to HDKR models in the solar thermal collector plane.
The maximum effective area of i-th day solar thermal collector is specially：
Wherein：T is day fresh water yield, and ε is absorption type desalinization performance ratio, qlFor the latent heat of vaporization of water.
Compared with prior art, the invention has the advantages that：
1) it is constraints to provide based on day fresh water demand yield, improves the degree of accuracy for Solar use income,
And then improve the area-optimized degree of accuracy.
2) design for the absorption type seawater desalination system of emerging solar energy driven by hybrid heat sources provides guidance with borrowing
Mirror, change the present situation of solar seawater desalination system empirically coarse designs more, improve the feasibility for promoting the technology.
3) by optimizing heat collector area, on the premise of desalinization heat demand is ensured, solar energy is both made full use of
This cleaning, environmental protection the energy, saved initial cost again, within the lifetime of system phase obtain economic optimum,
4) solar radiation data, different desalinization performance ratios and the different supplementary energy shapes of different accuracy be specify that
Influence of the formula for optimum results, facilitates engineering project cross-referenced.
Brief description of the drawings
Fig. 1 is the key step schematic flow sheet of the inventive method；
Fig. 2 is heat collector area prioritization scheme implementation process figure in the embodiment of the present invention；
Fig. 3 is the adsorption-type solar seawater desalination system schematic diagram in the embodiment of the present invention.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with the technology of the present invention side
Implemented premised on case, give detailed embodiment and specific operating process, but protection scope of the present invention is unlimited
In following embodiments.
A kind of heat collector area optimization method for adsorption-type solar seawater desalination system, wherein absorption type seawater
Superpower adsorption capacity of the desalination technology using some solid matters (such as silica gel, zeolite) to vapor, it is a large amount of to absorb aggregation often
Warm seawater steam, adsorbent is then heated by low-temperature heat source desorption is carried out to vapor therein, while it is light to collect condensation
Water, realize desalinization.
As shown in FIG. 1 to 3, optimization method includes：
Step S1：It is determined that the optimum angle of incidence of the solar thermal collector on installation ground, optimum angle of incidence is to add up to obtain in 1 year
The maximum inclination angle of solar energy is obtained, when actual optimum angle of incidence is unknown, with local latitude angle optimum angle of incidence the most.；
Step S2：The daily maximum effective area of solar thermal collector is determined according to day fresh water demand yield, i-th day too
It is positive can the maximum effective area of heat collector be specially：
Wherein：T is day fresh water yield, and ε is absorption type desalinization performance ratio, qlFor the latent heat of vaporization of water；
Step S3：Under optimum angle of incidence, according to the area of solar thermal collector daily maximum effective area and heat collector
Net profit in solar thermal collector lifetime is calculated, is specifically included：
Step S31：Determine under optimum angle of incidence, calculate the gross earnings of solar thermal collector：
Ai=min (As,Amax,i)
Wherein：S is gross earnings, and n is the solar energy collector system life-span, and p aids in traditional energy source prices, HiFor i-th day too
The sun total amount of irradiation of unit area, A in positive energy heat collector planeiFor the solar thermal collector effective area of i-th day, ηcFor collection
The hot full-time collecting efficiency of device, and ηlFor pipeline and accumulation of heat water pot heat loss, AsFor the area of solar thermal collector, Amax,iFor i-th
The maximum effective area of its solar thermal collector；
Step S32：With reference to solar energy heat distribution system cost, net profit in the lifetime of solar thermal collector is calculated：
J=S-Z × (1+r)n
Wherein：J is the net profit that solar thermal collector is brought, and Z is the cost of solar energy collector system, and r is bank's profit
Rate.
Step S4：Solar thermal collector area optimizing is carried out, it is determined that making the solar energy heating that net profit is maximum in lifetime
The optimal area of device.
Therein, the sun total amount of irradiation of unit area determines according to HDKR models in solar thermal collector plane, the sun
The energy that energy heat collector can obtain changes with its mounted angle, and optimal mounted angle is according to application scenarios difference definable
To obtain the inclination angle at the maximum inclination angle of solar energy or required supplementary energy amount minimum.In the application solar thermal collector be for
Absorption type seawater desalination system heat supply, demand heat is kept constant day by day, thus optimal mounted angle is can add up to obtain
The heat collector inclination angle of most energy.In addition, research this inclination angle of surface is approximately equal to project location angle of latitude at present, therefore work as
Optimum angle of incidence can be designed when unknown according to local dimension angle.
The solar irradiation on optimal inclination angle is calculated, can first consult local meteorological data, obtains sun spoke on horizontal plane
Data are penetrated, are then calculated according to HDKR (Hay, Davies, Klucher, Reindl) model, specifically：
Wherein, ItFor total solar irradiation in inclined plane, IdhFor the direct sunlight irradiation on horizontal plane, IshFor level
Sun scattering irradiation on face, IhFor the sun total amount of irradiation on horizontal plane, FaFor air coefficient of transparency, ρ is surface emissivity
Rate, and RbFor direct solar radiation coefficient, can be calculated according to following formula：
Wherein, δ is the sun deviation angle,For solar hour angle, and β is heat collector mounting inclination angle.
And air coefficient of transparency FaIt is defined as
Wherein, Gb,iFor normal direction direct solar radiation intensity in air, and Go,i, can be under for normal direction radiation intensity outside air
Formula calculates,
Wherein GscFor solar constant.
For a certain adsorption-type solar seawater desalination system, usual fresh water yield, systematic function ratio, system cost, it is
The many factors such as system life-span, complementary energy prices, local solar irradiation and bank rate are, it is known that then system net profit
The monotropic function of heat collector area can be regarded as, i.e.,
J=f (A)
Then heat collector area optimizing is believed that in the range of possible heat collector area, in Hi× A ＜ ＜ Hi× AMax, i's
Under restrictive condition, the maximum of the function is found.
Due to aiding in the species of conventional energy resource to include fossil fuel, electric energy, bio-fuel, in the system concept phase,
, can be by changing system net profit meter when can not determine desalinization performance ratio or can not determine using which kind of auxiliary thermal source
Two parameters of p and ε in formula, the optimum results under different situations are discussed, foundation is provided for decision-making.
Claims (6)
- A kind of 1. heat collector area optimization method for adsorption-type solar seawater desalination system, it is characterised in that including：Step S1：It is determined that the optimum angle of incidence of the solar thermal collector on installation ground；Step S2：The daily maximum effective area of solar thermal collector is determined according to day fresh water demand yield；Step S3：Under optimum angle of incidence, according to the areal calculation of solar thermal collector daily maximum effective area and heat collector Net profit in solar thermal collector lifetime；Step S4：Solar thermal collector area optimizing is carried out, it is determined that making the solar thermal collector that net profit is maximum in lifetime Optimal area.
- A kind of 2. heat collector area optimization side for adsorption-type solar seawater desalination system according to claim 1 Method, it is characterised in that the optimum angle of incidence is to add up that the maximum inclination angle of solar energy can be obtained in 1 year.
- A kind of 3. heat collector area optimization side for adsorption-type solar seawater desalination system according to claim 1 Method, it is characterised in that the step S3 includes：Step S31：Determine under optimum angle of incidence, calculate the gross earnings of solar thermal collector：<mrow> <mi>S</mi> <mo>=</mo> <mi>n</mi> <mo>&times;</mo> <mi>p</mi> <mo>&times;</mo> <munderover> <mo>&Sigma;</mo> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mn>365</mn> </munderover> <msub> <mi>H</mi> <mi>i</mi> </msub> <mo>&times;</mo> <msub> <mi>A</mi> <mi>i</mi> </msub> <mo>&times;</mo> <msub> <mi>&eta;</mi> <mi>c</mi> </msub> <mo>&times;</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>-</mo> <msub> <mi>&eta;</mi> <mi>l</mi> </msub> <mo>)</mo> </mrow> </mrow>Ai=min (As,Amax,i)Wherein：S is gross earnings, and n is the solar energy collector system life-span, and p aids in traditional energy source prices, HiFor i-th day solar energy collection The sun total amount of irradiation of unit area, A in hot device planeiFor the solar thermal collector effective area of i-th day, ηcIt is complete for heat collector Day collecting efficiency, and ηlFor pipeline and accumulation of heat water pot heat loss, AsFor the area of solar thermal collector, Amax,iFor i-th day sun The maximum effective area of energy heat collector；Step S32：With reference to solar energy heat distribution system cost, net profit in the lifetime of solar thermal collector is calculated：J=S-Z × (1+r)nWherein：J is the net profit that solar thermal collector is brought, and Z is the cost of solar energy collector system, and r is bank rate.
- A kind of 4. heat collector area optimization side for adsorption-type solar seawater desalination system according to claim 3 Method, it is characterised in that the species of the auxiliary conventional energy resource includes fossil fuel, electric energy, bio-fuel.
- A kind of 5. heat collector area optimization side for adsorption-type solar seawater desalination system according to claim 3 Method, it is characterised in that the sun total amount of irradiation of unit area determines according to HDKR models in the solar thermal collector plane.
- A kind of 6. heat collector area optimization side for adsorption-type solar seawater desalination system according to claim 3 Method, it is characterised in that the maximum effective area of i-th day solar thermal collector is specially：<mrow> <msub> <mi>A</mi> <mrow> <mi>m</mi> <mi>a</mi> <mi>x</mi> <mo>,</mo> <mi>i</mi> </mrow> </msub> <mo>=</mo> <mfrac> <mrow> <mi>t</mi> <mo>&times;</mo> <msub> <mi>q</mi> <mi>l</mi> </msub> </mrow> <mi>&epsiv;</mi> </mfrac> <mo>/</mo> <mo>&lsqb;</mo> <msub> <mi>H</mi> <mi>i</mi> </msub> <mo>&times;</mo> <msub> <mi>&eta;</mi> <mi>c</mi> </msub> <mo>&times;</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>-</mo> <msub> <mi>&eta;</mi> <mi>l</mi> </msub> <mo>)</mo> </mrow> <mo>&rsqb;</mo> </mrow>Wherein：T is day fresh water yield, and ε is absorption type desalinization performance ratio, qlFor the latent heat of vaporization of water.
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Cited By (1)
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| CN111090946A (en) * | 2019-12-24 | 2020-05-01 | 青海民族大学 | Optimization method for heat collection area of composite solar heat collection system |
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