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  • FIRST POST
    • Martyn1981
    • By Martyn1981 9th Jun 15, 7:25 AM
    • 8,089Posts
    • 12,735Thanks
    Martyn1981
    Green, ethical, energy issues in the news (last 2 weeks)
    • #1
    • 9th Jun 15, 7:25 AM
    Green, ethical, energy issues in the news (last 2 weeks) 9th Jun 15 at 7:25 AM
    MSE Insert:

    We've seen some debate on this thread about the relevance of some posts to the topic.

    To ensure the thread remains on topic for forumites wanting to discuss the latest news we're asking that all posts contain a link to the news you're discussing.

    For the purposes of this thread the "news" needs to be within the last two weeks.

    Back to Martyn1981's original post.

    ---

    I thought it might be a good idea to have a thread for posting general news items that may be of interest.

    PV and the 'Solar in the news' thread attract a lot of interest, so here's a thread for all the other goings on.

    Mart.
    Last edited by MSE Andrea; 09-10-2018 at 10:41 AM.
    Mart. Cardiff. 5.58 kWp PV systems (3.58 ESE & 2.0 WNW)

    For general PV advice please see the PV FAQ thread on the Green & Ethical Board.
Page 96
    • NigeWick
    • By NigeWick 15th Feb 19, 9:15 AM
    • 2,990 Posts
    • 1,315 Thanks
    NigeWick
    cost) of building net-zero homes
    Originally posted by Martyn1981
    I seem to recall a university in Wales was building net zero homes at the same cost as "normal" ones.
    The mind of the bigot is like the pupil of the eye; the more light you pour upon it, the more it will contract.
    Oliver Wendell Holmes
    • NigeWick
    • By NigeWick 15th Feb 19, 9:18 AM
    • 2,990 Posts
    • 1,315 Thanks
    NigeWick
    I can't help thinking that they are still lowballing here, as costs/prices for RE and storage (battery and large scale longer term storage) are still falling and deployments are speeding up. I'd expect more of a rising curve deployment, than a steady roll out now.
    Originally posted by Martyn1981
    You're obviously forgetting that HMGov has a vested self interest in keeping fossil burning and nuclear energy going.

    Why do you think they're dropping FiT and BEV incentive, and, got rid of the legislation for more efficient buildings?
    The mind of the bigot is like the pupil of the eye; the more light you pour upon it, the more it will contract.
    Oliver Wendell Holmes
    • sevenhills
    • By sevenhills 15th Feb 19, 12:55 PM
    • 2,149 Posts
    • 797 Thanks
    sevenhills
    Why do you think they're dropping FiT and BEV incentive, and, got rid of the legislation for more efficient buildings?
    Originally posted by NigeWick

    One of their priorities is high numbers of houses built.

    • zeupater
    • By zeupater 15th Feb 19, 1:05 PM
    • 4,528 Posts
    • 6,079 Thanks
    zeupater
    I seem to recall a university in Wales was building net zero homes at the same cost as "normal" ones.
    Originally posted by NigeWick
    Hi

    We've more than met the ZEB (net-zero energy emissions) requirements and have been borderline ZNE (net-zero energy) for some time .... since the installation of the heatpump we've been seriously bettering both!

    Currently powering the house, providing around 2.5kW of space heating & ~1.3kW of DHW heating and still exporting ~1.7kW to the neighbours!! ... looks like banking a net positive day today ...

    HTH
    Z
    "We are what we repeatedly do, excellence then is not an act, but a habit. " ...... Aristotle
    • silverwhistle
    • By silverwhistle 15th Feb 19, 5:10 PM
    • 2,248 Posts
    • 3,206 Thanks
    silverwhistle
    Yep, it's been a good couple of days for solar. My setup is very basic but I've a (very) hot tank of water, done some washing and batch baking and manually switched an oil-filled radiator. As the temperature drops rapidly with the cloudless skies I shall light the stove furnished with free wood. Just picked up another tub of large joinery off-cuts from my neighbour this very afternoon.


    If our experience was replicated more widely evening peaks would reduce even more. Has anyone got any experience of single room MHRV, for my bathroom as I can justify that level of investment for my single occupancy terrace house but couldn't for a household system?
    • Martyn1981
    • By Martyn1981 15th Feb 19, 6:00 PM
    • 8,089 Posts
    • 12,735 Thanks
    Martyn1981
    Why do you think they're dropping FiT and BEV incentive, and, got rid of the legislation for more efficient buildings?
    Originally posted by NigeWick
    Here's a very timely reminder (article dated 12/2/19) on that very subject, explaining what 'they' did, and the cost implications of residents. And of course, more energy consumed (by anyone and everyone), is an impact on everyone, an impact it would have been nice to reduce.

    Zero Carbon Homes axe costing consumers £200 per year

    “One of our long-running campaigns is for better new-build homes; low standards, thin walls and inadequate heating are problems that we see time and again. Homes should be built to the highest standards to be fit for this and future generations; government and industry need to recognise that it’s in everyone’s interest to get this right.”
    Mart. Cardiff. 5.58 kWp PV systems (3.58 ESE & 2.0 WNW)

    For general PV advice please see the PV FAQ thread on the Green & Ethical Board.
    • Martyn1981
    • By Martyn1981 15th Feb 19, 6:23 PM
    • 8,089 Posts
    • 12,735 Thanks
    Martyn1981
    Slightly misleading headline, as there is but one WT (so far), and the wind farm 'will' be the biggest ...... but what a story regarding the modular nature of some RE generation.

    World’s Largest Offshore Wind Farm Hornsea One Generates First Power
    Mart. Cardiff. 5.58 kWp PV systems (3.58 ESE & 2.0 WNW)

    For general PV advice please see the PV FAQ thread on the Green & Ethical Board.
    • pile-o-stone
    • By pile-o-stone 18th Feb 19, 9:11 AM
    • 105 Posts
    • 130 Thanks
    pile-o-stone
    Hi

    We've more than met the ZEB (net-zero energy emissions) requirements and have been borderline ZNE (net-zero energy) for some time .... since the installation of the heatpump we've been seriously bettering both!

    Currently powering the house, providing around 2.5kW of space heating & ~1.3kW of DHW heating and still exporting ~1.7kW to the neighbours!! ... looks like banking a net positive day today ...

    HTH
    Z
    Originally posted by zeupater
    Hi Z,

    Apologies if you've discussed this in the past (if so, do you have a link?) but I'm really interested in how you've achieved this, especially if your home is a retrofit.
    5.18 kWp PV systems (3.68 E/W & 1.5 E).
    Solar iBoost+ to two immersion heaters on 300L thermal store.
    • zeupater
    • By zeupater 18th Feb 19, 1:05 PM
    • 4,528 Posts
    • 6,079 Thanks
    zeupater
    Hi Z,

    Apologies if you've discussed this in the past (if so, do you have a link?) but I'm really interested in how you've achieved this, especially if your home is a retrofit.
    Originally posted by pile-o-stone
    Hi

    Effectively the house was built in the early '80s to a bespoke design which incorporated higher than minimum spec insulation levels for the time (eg - underfloor pumice thermal barrier!) as well as some optimisation of glazed areas to help with solar gain, intentionally high internal thermal mass to smooth internal temperatures, high spec (for the time!) cavity insulation, double glazing etc ...

    The property is considerably larger than the UK average and has going on 200sqm of loft space which made for an easy target for improvements, so we upgraded the loft insulation to ~500mm (+in places) ... add in sealing (most of!) the usual air ingress holes and improving the quality of draft seals on all external openings as well as improving the thermal efficiency of external doors (including loft hatches, door to loft space, internal garage access etc ... even the wooden doors to an integral garage are internally insulated & draught sealed ....

    Open fire was replaced with a high efficiency log burner a couple of decades ago, we have solar thermal & solar PV, high efficiency GCH boiler & zoned heating (which gets little use!) and now also a small heatpump.

    For a couple of decades we've strived to reduce energy use through actively chasing high efficiency products & appliances, not only when replacement is due, but when there's a perceived benefit from doing so (environmental or financial) ...

    Add to this a vegetable patch which is likely larger than most modern gardens, a small orchard (which is around 4x as large as the veg patch!) along with plenty of trees/bushes for kindling & you'll understand that we're also far more self sufficient than most too!

    The house is 'only' EPC rated at the top end of the 'B' band and this was assessed prior to a number of further improvements, however, the rdSAP system used for the EPC is flawed in many respects (ie dumbed down for assessors!) for example, not recognising (no tick box) the level of loft insulation we have & some of the high spec insulation materials we've used in various places or having the ability to assess which of the heat sources is primary or apportion energy supplied by each ... it's also important to note that the assessor wouldn't confirm the existance of underfloor insulation, so the score & banding excludes this.

    For a couple of decades I've modelled (spreadsheet) the properties of the building using a combination of SAP(full) & individual material properties and have a decent idea of heatloss in various ambient conditions. This has been used to justify investment in further thermal improvements based on 'investment' recovery years ... there is plenty that can still be done, but not much that makes financial sense!

    Our actual energy usage (detailed records for a couple of decades) not only confirms that the model mentioned above is pretty accurate, but also that the house meets the majority of criteria which would apply to passivhaus properties, but where we miss we're still far closer to passivhaus than current building standard requirements!

    Hope this gives an idea!


    HTH
    Z
    Last edited by zeupater; 18-02-2019 at 1:19 PM. Reason: formatting +grammar
    "We are what we repeatedly do, excellence then is not an act, but a habit. " ...... Aristotle
    • pile-o-stone
    • By pile-o-stone 19th Feb 19, 2:20 PM
    • 105 Posts
    • 130 Thanks
    pile-o-stone
    Hi

    Effectively the house was built in the early '80s to a bespoke design which incorporated higher than minimum spec insulation levels for the time (eg - underfloor pumice thermal barrier!) as well as some optimisation of glazed areas to help with solar gain, intentionally high internal thermal mass to smooth internal temperatures, high spec (for the time!) cavity insulation, double glazing etc ...

    The property is considerably larger than the UK average and has going on 200sqm of loft space which made for an easy target for improvements, so we upgraded the loft insulation to ~500mm (+in places) ... add in sealing (most of!) the usual air ingress holes and improving the quality of draft seals on all external openings as well as improving the thermal efficiency of external doors (including loft hatches, door to loft space, internal garage access etc ... even the wooden doors to an integral garage are internally insulated & draught sealed ....

    Open fire was replaced with a high efficiency log burner a couple of decades ago, we have solar thermal & solar PV, high efficiency GCH boiler & zoned heating (which gets little use!) and now also a small heatpump.

    For a couple of decades we've strived to reduce energy use through actively chasing high efficiency products & appliances, not only when replacement is due, but when there's a perceived benefit from doing so (environmental or financial) ...

    Add to this a vegetable patch which is likely larger than most modern gardens, a small orchard (which is around 4x as large as the veg patch!) along with plenty of trees/bushes for kindling & you'll understand that we're also far more self sufficient than most too!

    The house is 'only' EPC rated at the top end of the 'B' band and this was assessed prior to a number of further improvements, however, the rdSAP system used for the EPC is flawed in many respects (ie dumbed down for assessors!) for example, not recognising (no tick box) the level of loft insulation we have & some of the high spec insulation materials we've used in various places or having the ability to assess which of the heat sources is primary or apportion energy supplied by each ... it's also important to note that the assessor wouldn't confirm the existance of underfloor insulation, so the score & banding excludes this.

    For a couple of decades I've modelled (spreadsheet) the properties of the building using a combination of SAP(full) & individual material properties and have a decent idea of heatloss in various ambient conditions. This has been used to justify investment in further thermal improvements based on 'investment' recovery years ... there is plenty that can still be done, but not much that makes financial sense!

    Our actual energy usage (detailed records for a couple of decades) not only confirms that the model mentioned above is pretty accurate, but also that the house meets the majority of criteria which would apply to passivhaus properties, but where we miss we're still far closer to passivhaus than current building standard requirements!

    Hope this gives an idea!


    HTH
    Z
    Originally posted by zeupater
    Fantastic, thanks Z. I agree with your views on EPC ratings. We made some huge improvements from when we bought our house (A rated windows, warm roof, etc.) to fitting our solar panels (and getting a new EPC sorted for FiTs) and our environmental impact rating actually got worse!
    5.18 kWp PV systems (3.68 E/W & 1.5 E).
    Solar iBoost+ to two immersion heaters on 300L thermal store.
    • ed110220
    • By ed110220 20th Feb 19, 5:09 PM
    • 1,076 Posts
    • 567 Thanks
    ed110220
    One of their priorities is high numbers of houses built.
    Originally posted by sevenhills
    One of their priorities is higher profits for big construction companies that are major donors to the party. Fixed that for you

    But seriously I don't buy the Trump-style argument that relaxing these sort of regulations will benefit ordinary people, or that high prices of housing etc is because of "overly burdensome" environmental regulation.
    • Martyn1981
    • By Martyn1981 21st Feb 19, 8:04 AM
    • 8,089 Posts
    • 12,735 Thanks
    Martyn1981
    This is good news, but it still makes me sad:

    Germany Awards 476 Megawatts In Latest Undersubscribed Onshore Wind Auction

    So, despite local permitting issues and an underscribed auction bringing in higher prices than before, we still see on-shore wind at ~£54/MWh. Also PV at ~£42/MWh.

    I strongly believe that if the UK allowed these technologies to bid for a CFD contract, they would come in at around £50/MWh, and end up being net subsidy zero due to similar average wholesale prices. Ho hum!
    Mart. Cardiff. 5.58 kWp PV systems (3.58 ESE & 2.0 WNW)

    For general PV advice please see the PV FAQ thread on the Green & Ethical Board.
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