The solar radiation model for Open Source GIS: implementation and applications
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Formal Metadata
Title 
The solar radiation model for Open Source GIS: implementation and applications

Title of Series  
Number of Parts 
45

Author 

License 
CC Attribution  NoDerivatives 3.0 Germany:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor. 
Identifiers 

Publisher 
University of Trento

Release Date 
2002

Language 
English

Content Metadata
Subject Area 
00:00
Implementation
Goodness of fit
Open source
Scientific modelling
Bit
Cartesian coordinate system
00:37
Satellite
Complex (psychology)
Building
Batch processing
Interpolation
Open source
Presentation of a group
Divisor
Scientific modelling
Multiplication sign
Combinational logic
Materialization (paranormal)
Distance
Power (physics)
Number
Workstation
Goodness of fit
Centralizer and normalizer
Crosscorrelation
Database
Units of measurement
Physical system
Task (computing)
Condition number
Mobile Web
Dialect
Process (computing)
Scaling (geometry)
Information
Computer
Projective plane
Set (mathematics)
Grass (card game)
Limit (category theory)
Cartesian coordinate system
Local Group
Word
Software
Convex set
Gravitation
Resultant
Matching (graph theory)
05:46
Scientific modelling
Multiplication sign
Survival analysis
Parameter (computer programming)
Function (mathematics)
Mereology
Food energy
Image resolution
Medical imaging
Meeting/Interview
Hypermedia
Linker (computing)
Position operator
Physical system
Moment (mathematics)
Sound effect
3 (number)
Twodimensional space
Variable (mathematics)
Measurement
Degree (graph theory)
Vector space
Angle
output
Right angle
Quicksort
Resultant
Asynchronous Transfer Mode
Probability density function
Interpolation
Divisor
Presentation of a group
Real number
Connectivity (graph theory)
Inclined plane
Rule of inference
Kritisches Phänomen
Centralizer and normalizer
Average
Internetworking
Database
Liquid
Subtraction
Condition number
Scaling (geometry)
Information
Autocovariance
Projective plane
Diffuser (automotive)
Total S.A.
Cartesian coordinate system
Local Group
Estimator
Subject indexing
Particle system
Word
Summation
Personal digital assistant
Family
15:31
Degree (graph theory)
Area
Revision control
Mathematics
Meeting/Interview
Connectivity (graph theory)
Database
Diffuser (automotive)
output
Inclined plane
Food energy
16:44
Metre
Point (geometry)
Open source
Connectivity (graph theory)
Multiplication sign
Scientific modelling
Time series
Mereology
Theory
Revision control
Web 2.0
Image resolution
Mathematics
Meeting/Interview
Database
Authorization
Energy level
Representation (politics)
Extension (kinesiology)
Subtraction
Area
Covering space
Moment (mathematics)
Diffuser (automotive)
Sound effect
Cartesian coordinate system
Pattern language
Resultant
Flux
21:25
Interpolation
Lecture/Conference
Database
Data management
00:02
right and and we can get people seated all right so you you have you got your your coffee because we have an exciting last session of the day here about a little bit of everything and the 1st talk is going to be the solar radiation model source GIS implementation and application and then after the story is going to give the up you want my strength good afternoon that I'm coming from a company in for the
00:41
room genetic now I'm also working in In the European Commission Joint Research Centre where I am involved in the project who were the primary task of what to do the it is at the front scales New Europe the problem was that was to build databases we didn't find that tools so which could be be helpful for us so force task to develop new solar should model which they're all working the problem is that with your found in other solutions that here I wanted also to say that in our company we use not only open source in genesis of her but also commercial software and then we have found that quite a good convex combination using both systems in which help us to overcome the different problems but the development of mobile or the model down in the grass because the gravity of really powerful system for building models only good possibility to override a longer computations batch process but that processing in this presentation I will get from them comments on the radiation the problems of modelling the of the method which can be used for deriving the G. I met then I will have some comments on the phone model it and
02:38
I would like to present some of of the applications the In a word in that when talking about the radiation that is quite interesting in many application technical environmental the lender be and so on as a permanent to do this want to read you who apparently the correlation is that it is it is measured the only quite limited number of all of the metalogic station during around the world it is that the condition better in Europe but still not satisfactory it to but you have to derive a GIS met therefore from and again the only example of the Central and Eastern Europe from these popular limited number of patients we have to provide got to 100 highresolution match so the primary question is what is the so radiation available for our applications In all in the side which where we just got to uh which is in the relatively large distance from the neighboring stations they that the group of methods which are used to derive a spatially distributed spatial interpolation techniques are relatively the the the because solar radiation is determined by a complex set of factors these methods are usually not satisfactory for providing result that the we will need in the allotted in unit detail in regional scale therefore multivariate methods are used to each taking into account also the really or light data or other contextual information the 2nd group of methods which is the cost of erected quite successful successful are processing of satellite the time in the logical data are coming from geostationary satellite like MIT materials that and so on but the 3rd approach which is the of promising and you will see the result is generated based modeling only the most useful approach is to combine 2 or 3 methods as described here when talking about solar radiation modeling I have to the thing that there are factors which
05:52
are relatively easy to model which can be which can have quite clear critical behavior 1st of all there is a there are of of the factors to be connected with the rotational motion and that really sort of training which are good to know which is aware the problems with modelling Cu don't agree that the 3rd group of vector the atmospheric attenuation where the constant constant indicate low in deriving the necessary spatial data is growing from top to bottom the most problematic factors to be modeled are called and also the solid and liquid part particles which are available in an atmosphere them and so now the model works here are the input parameters listed input parameters which are necessary for modeling so radiation the 1st group is need necessary to model the so called Clear Skies radiation where we don't consider the effect of golf so we considered clear atmosphere in some funny at most of the family as the weather situation the difference between irradiance and irradiation in that of the original again of the need to give off the now I know the value of the solar power which is available at the moment at the time a moment while irradiation the represents solar energy which is available at a certain in a certain time interval for example 1 day 1 month or so the red market the images which are used to the model of a I mean the problematic focal problematic factors and link it immediately which express the expressed in the influence of the so the particles in the atmosphere I not work cannot be described by the terministic models and usually are these parameters it is derived in using empirick empirical estimations there are some possibilities to derive the values in the they in our the paper PDF presentation and you can find also some on the internet link to model real kind irradiance Soria radiation we need information about the status of coding it average is like a monthly averages or annual averages the quite often used empirical parameter is you use which is called of clear sky index which describe the attenuations of clear skies atmosphere by all the components of the of the of the radiation beam and diffuse and that I don't want to go into too much into the details so what are the outputs of the net model 1st of all there are 3 components of the solar radiation which are computed as you can see that there are 2 modes of you can run the model just for 1 time amendments to the 2nd or you can run it on a longer on a on a basis of vertical collecting the stands for 1 day 1 month or so then there are some other parameters which are really which can be calculated like incidence and or the duration of the irradiation during 1 day camp the government from data of which are also written to text again just to free market and that prove the real modeling or the modeling income variable kind of conditions depends on the availability of information about coordinates which In our case case was described by the empirical index restrained that In the 1st applications that that may prevent the model output only the continental scale in do you consider Central and Eastern European countries and then will be in the database was built tool you know in which aims to be used in the afternoon as assessment of the performance of photovoltaic systems photovoltaic systems are there are 4 panels and you can see here on this rule for all the the house which together with some other electrical equipment which are common working at the of energy to electrical uh to the electricity and the in our project the all the Taliban in the hope that the interest was focused to the systems which are directly connected to the electrical grid to the the electricity to the grid during the the daily hours and the right to to to take electricity from the grid for the inhabitants of the house during the nite hours yes the evidence that we have used the word so the whole duration model and then we have used the word interpolation methods in the ground of twodimensional interpolation methods finally cracked engine and also media binding as well there are the of the data used to that based on the digital terrain model for 1 kilometer grid resolution and then we have climatic data from 182 patients there is nothing the database companies offer of monthly and annual averages of daily total of global irradiation all at the front of panels that different provisions so the methodology look like this here are the main input parameters elevation these attributed latitude which we're used to calculate the so called the covariance that means considering atmosphere without atmospheric without because the attenuation then out and like where the in where you that where calculated quadratic calculated from the methodological measurements here is the in the spatial interpolation using the market and I put it finally we which takes into account not only of these so for a measurement but also terrain and the the results for real conditions so now let me give you some more detailed insight into the database the the solar radiation global radiation which means which means that the sum of the human and the UNIX and reflect reflected components the and panels which are inclined inclined solve for it that a different inclination angle is quite important the think which will will ask by engineers and technicians so which are working in which which are called the great thing about this photovoltaic systems because inclination angles certainly uh determined the amount of electricity which precluded the system so you can see that the the higher the inclination angle the more of electricity or that the more solar energy is available for son of solar panels but this is a highly dependent on the latitude and here you can see that increasing the solar panels from horizontal position to the in degrees you can had about up to 500 what better in
15:30
average we here is an increase of the
15:38
energy income when considering these the user and the but here you can see that improving the inclination of the solar panels up to 40 degrees uh does not mean that a bigger the increase in the solar energy input and
15:56
in some areas mostly below the latitude of 40 5 degrees that there is at energy decreases so that means that there is no and what is the it is not a meaningful put solar panels higher than something about 25 degrees the here is the and here you can see see that the the null changes of solar radiation during the year which is relatively the majority 1 of the most very important I think when talking about solar radiation database is that the the so called the diffuse component so each has to be conflict
16:48
considered in many applications so can you could see the time series here I don't want it to show that that our results can be compared to the previously done compute database is computed from using different approaches and then you will have features and where where you found mostly because of better representation of the terrain the 2nd application is the from Slovakia and it just shows the possibility of the medical application for the computing the 1st year radiance that means the time in 1 of the radiation that is available at a certain moment of time here can see what is the difference between the beam and diffuse and reflected components found in many works reflected component is just an example of that is just not considered because it and to the global radiation on a very small here is the theory of 2 different hours computed for for the sprinkler occurring on the difference between morning tend to return the the number of moles and here this example shows that difference when considering all of the difference of common considering or not considering so called shadowing effect all of the room mountaineers reduce the which can contribute quite significantly to lowering of radiation that in is also another example of which where you can see and that do the same a method ecological approach applied on 2 different on dataset to be the resolution 1 of what you wanted to and the 100 meters as you can see that considering the shadowing effect and have revealed that required significant change the lowering of available for revision in January in mountainous area which is what you can see on the web of data and document the data where room because the database database consists of time series you can use also animations to In better communicate their temporal spatial and temporal patterns of the changing all already shown here in on on the extent then do you have to conclude that the new model is now available in the level of either version of it is the complex and of flexible the and it so it is based on the the European authorities in every village which will published you know the different parts of the the world and to paper the end because of open source so it can be modified for any other purposes so after new improvements in that the fluoridation research they commissions can be modified thank you and of so on I run very quick question that equipment the question the question that I didn't Pollyanna and maybe I
21:10
didn't at that point all of our model is that the effect of which I always still alive to it is a of the can't cover a wall calculated from the
21:25
that of ground to measure the value and it will that the spatial database was calculated using the interpolation by what are the Net multidimensional interpolation and I think that negative you can find in our paper it's not so easy to pretend
21:52
them back at the management of all of OK I would then
22:13
move on