Page 3 of 4 FirstFirst 1234 LastLast
Results 21 to 30 of 35
Like Tree27Likes

Thread: Calculating the solar panel angle

  1. #21
    New Member
    Join Date
    Feb 2015
    Posts
    1
    Has anyone ever heard of V3 Solar? I used to work for them, and they have a lot of great ideas about solar energy, especially their straight to AC models.

  2. #22
    New Member
    Join Date
    Jul 2014
    Location
    Warsaw (Poland)
    Posts
    14
    Hi,
    The new version of the app has been published. It includes Incidence Angle Modifiers (IAMs), so the app knows the way of how a specific panel "sees" the incidence radiation.

    The app now measures a) direct insolation (without IAMs as in the previous version) - the energy of direct solar radiation with shading analysis reaching a flat oriented plane and b) effective insolation (with IAMs) - the energy being effectively intercepted by a specific panel form the direct irradiation with shading analysis.

    I have used the term 'effective insolation' instead of 'output power' since the letter one depends on other parameters too (temperature difference etc.) causing confusions.

    In case of simple PV panels - the difference of the measured panel orientation with IAMs (effective insolation) and without (direct insolation) is very little. This is because flat plate IAMs does not significantly differ from unity for a wide range of incidence angles (angles up to 60 or 70 deg). So with reasonable accuracy you may use just the standard direct insolation measurement when setting up flat-plate PV-panels

    Significant difference may appear when a panel has complicated (often biaxial) optics. This is the case of concentrating panels, hybrid collectors or just solar thermal collectors (evacuated tubes etc.). Then taking into account IAMs (so the range of acceptance angles of the panel) is more accurate.

    For more details please visit
    Scan The Sun - Solar panels optimization

    You may free upload IAM characteristics of your collectors with the website:
    www.scanthesun.com/panels.php

    Regards,
    Ernest.

  3. #23
    New Member
    Join Date
    Jul 2014
    Location
    Warsaw (Poland)
    Posts
    14
    Hi friends,
    I'm happy to announce that the ScanTheSun project won the Energy Globe National Award this year. Now it takes part in international competition. I would like to thank all of you for the feedback that allowed decent debugging of the ScanTheSun code and make important changes and corrections.

    With best regards,
    Ernest.
    droneBEE and Ernest like this.

  4. #24
    Senior Member
    Join Date
    Aug 2014
    Posts
    597
    Quote Originally Posted by Ernest Grodner View Post
    Hi friends,
    I'm happy to announce that the ScanTheSun project won the Energy Globe National Award this year. Now it takes part in international competition. I would like to thank all of you for the feedback that allowed decent debugging of the ScanTheSun code and make important changes and corrections.

    With best regards,
    Ernest.
    i love your app, congratulations.

    i was wondering tough, what do you think about adding a few stepper motors to the collector to pan and tilt it automatically.
    your app knows the best orientation, so it could communicate it to the micro-controller who will move the motors accordingly. the micro controller and motors could be powered by the panel.
    i am not sure if this kind of optimization worth the effort, what do you think?
    droneBEE likes this.

  5. #25
    Senior Member
    Join Date
    Jan 2013
    Location
    Woodbridge, Virginia
    Posts
    1,141
    Quote Originally Posted by HAL9000 View Post
    i love your app, congratulations.

    i was wondering tough, what do you think about adding a few stepper motors to the collector to pan and tilt it automatically.
    your app knows the best orientation, so it could communicate it to the micro-controller who will move the motors accordingly. the micro controller and motors could be powered by the panel.
    i am not sure if this kind of optimization worth the effort, what do you think?
    Stepper motors can constantly draw power, so you probably want to do something about that if you don't want them to draw more energy than the solar panels collect. Here's something I found from a quick search that talks about using stepper motors for solar panel optimal positioning: https://www.pc-control.co.uk/howto_tracksun.htm

  6. #26
    Senior Member
    Join Date
    Aug 2014
    Posts
    597
    Quote Originally Posted by Neil View Post
    Stepper motors can constantly draw power, so you probably want to do something about that if you don't want them to draw more energy than the solar panels collect. Here's something I found from a quick search that talks about using stepper motors for solar panel optimal positioning: https://www.pc-control.co.uk/howto_tracksun.htm
    thanks for the link. apparently they mostly use brushless dc motors and in some cases they can get a ratio of 2.5:1, so for each 1 kWh consumed by the motor, 2.5 kWh is produced by tracking the sun. not a bad deal...

  7. #27
    New Member
    Join Date
    Nov 2014
    Location
    orbitting
    Posts
    2
    I've always wondered is it not worthwhile to fit solar panels that can tilt? Clearly there is a cost to making this automatic during each day. However a manual option that you change with the seasons seems reasonable to me especially in more extreme latitudes.

  8. #28
    New Member
    Join Date
    Jul 2014
    Location
    Warsaw (Poland)
    Posts
    14
    Dear Friends,
    Thank you for your replies!
    I would like to present another application of the app. The reduction of the cars air-conditioning.
    Here is a report from our summer students workshop in Warsaw.
    Scan The Sun - Solar panels optimization

    Regards.

  9. #29
    New Member
    Join Date
    Jul 2014
    Location
    Warsaw (Poland)
    Posts
    14
    Dear Friends,
    Thank you for your replies!
    I would like to present another application of the app. The reduction of the cars air-conditioning.
    Here is a report from our summer students workshop in Warsaw.
    Scan The Sun - Solar panels optimization

    Regards.

  10. #30
    Member
    Join Date
    Jan 2017
    Location
    UK
    Posts
    143
    Do you take into account sunlight bounced off surrounding structures and the ground ?

    Also the effect snow has on both the light getting through to the panel, and light bouncing off the snow nearby towards the panels.

    As I've read of people having panels flat on the side of their houses, and wonder if painting the ground next to them would make a difference ?
    droneBEE likes this.

Page 3 of 4 FirstFirst 1234 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
web statistics
SEO by vBSEO 3.6.1