Home  5  Books  5  Magazines  5  News  5  GreenPro  5  HelpDesk  5  Your Cart  5  Register  5  Green Living Forum
Not signed in (Sign In)

Categories



Green Building magazine

Green Building magazine

New - Spring 2014 edition.

View the current issue.
Subscribe now.
Magazine homepage.
Browse back issues.





Vanilla 1.0.3 is a product of Lussumo. More Information: Documentation, Community Support.

Welcome to new Forum Visitors
Join the forum now and benefit from discussions with thousands of other green building fans and discounts on Green Building Press publications: Apply now.




    • CommentAuthoraa44
    • CommentTimeOct 22nd 2009
     
    Can anyone point me in the direction of some good solar radiation data by location for the UK?

    I am currently planning my new build and I am keen to include solar hot water and/or solar PV. The only snag is that I am in Shetland, i.e. 60 degrees North. I have heard rumours about a local PV installation that is producing virtually nothing so, before I shell out a load of money, I would like to do a few checks.

    Thanks
    AA
    • CommentAuthortony
    • CommentTimeOct 22nd 2009
     
    well insulated houses in Lapland regularly overheat due to too much sun shining in in winter if they have south facing glazing!

    Install solar panels at 75 degrees and you will be OK.
    • CommentAuthoraa44
    • CommentTimeOct 22nd 2009
     
    Overheating at the front is one of my worries. We are currently renting a place next to the site and when the sun comes out the front of the house turns into a cooker. I was at Interbuild at the NEC on Monday and I talked to some of the MVHR suppliers about the problem. All agreed that MVHR was not capable of shifting the heat round the house and one of them suggested putting in a separate ducting and fan system to suck the air out of the hot rooms and push it into the cooler ones to balance things up.
    • CommentAuthortony
    • CommentTimeOct 22nd 2009
     
    They only understand normal poorly insulated and built houses not low energy houses or passive houses like I think you are aiming at.
  1.  
    <blockquote><cite>Posted By: tony</cite>well insulated houses in Lapland regularly overheat due to too much sun shining in in winter if they have south facing glazing!
    </blockquote>You won't have that problem in Shetland. There's lots of on-line insolation data available, just use google or go to http://builditsolar.com and follow the links from there.

    <blockquote><cite>Posted By: tony</cite>They only understand normal poorly insulated and built houses not low energy houses or passive houses like I think you are aiming at.</blockquote>It's easy to calculate how much heat a HRV system will move around if you know the flow rates. In general, the air flow is about 10x too low to be of much use in cooling a hot room or vice versa - no matter how well insulated the rooms are.

    Q=Delta-T * 1.08 * CFM

    Q is in btu/h, delta T in degrees F and CFM is cubic feet per minute. It's not difficult to convert to metric. The delta-T here is the difference in temperature between the hot room and the cool room.

    Paul in Montreal.
    • CommentAuthorsinnerboy
    • CommentTimeOct 22nd 2009
     
    • CommentAuthorMegacycles
    • CommentTimeOct 22nd 2009
     
    http://re.jrc.ec.europa.eu/pvgis/apps3/pvest.php

    Sorry - can't work out how to make a hyperlink.

    This is an excellent utility, it will calculate the actual output for your location.

    The data appears accurate as it compares well to real-world installations
    • CommentAuthoraa44
    • CommentTimeOct 22nd 2009
     
    Thanks very much.
    AA
Add your comments

    Username Password
  • Format comments as
 
   
The Ecobuilding Buzz
Site Map    |   Home    |   View Cart    |   Pressroom   |   Business   |   Links   
Logout    

© Green Building Press