Frome Town Hall Logos of the range of organisations who will based there (PAC, CAB, Open storytellers, FF, FTC) The two theatres Pop up shops Fair Frome Health connectors (if a picture available)

Renewable energy for residential buildings Dietmar Bssler, energy craftsman

1Renewable energy sources (RES) for residential buildingsEnergy demand in residential buildingsRES-technology and systems for energy supply of buildingsEfficacy and efficiencysystem integrationSystem combinationsummerycontentWhat and where?

Energy demand in residential buildingsca. 85%ca. 85%Der Energiebedarf der Heizung wird unterschtztElectricity from photovoltaic (PV)Electricity and heat from CHPElectricity from small wind turbinesDiversity of systemsRE technology for building energy supplyHeat from solar thermal Heat from biomass(Wood, pellets, wood chip heating systems)Heat from heat pumps

conditionsRES systems for building energy supplyCriteria on site:Structural situationRoof, roof orientation, utility room, boiler room, heat distributionLiving conditions of the inhabitants and usersAutomatic-manual mode (firewood, ash, etc.)Wishes and financial possibilities of the customerpossibly divided into several stages of the project

You have the choiceRES systems for building energy supplyCriteria for system selection:Energy sources with no or the lowest energy costSun (solar energy + solar thermal), pellets, wood, wood chips, etc.Devices with high efficiency and more efficient use of energyHigh efficiency in partial load operationIntegration into the overall systemAre future enhancements and supplements possible?Combination of equipment and systemsSmart combinations with the aim RES = 100%, energy costs = 0,-

Efficiency and utilization countsHigh efficiency at part loadtime in use is increased by up to 4 hrs. per dayenergy output increases by 5 - 10%Ex. solar power - InverterWR 1turn-on > 188 V DCturn-on > 250 V DC

bis 15 hrs.bis 11 hrs.WR 2

Efficiency and utilization countsHigh efficiency at part loadLarge operating range with high efficiencyVery low emissionsEx. Wood Gasification Boilerwith swirl combustion chamber

Standard combustoroperating range good at only one pointlong heating period

Efficiency and utilization countsSystem integration is importantheat sourcesEx. Central buffer

heat consumersDirect distribution of heatCharacteristics:Direct distribution of heatCentral storage of heatFresh hot waterHeat sources operate independently of each otherAdvantages:Fast heat supply to consumersLow Standby lossesVery good combination possibilitiesAnytime, easily extendable

Efficiency and utilization countsSystem integration is importantIncrease of usage timeEnergy saving up to about 50%Energy saving up to 20%Ex. Solar water heatingVar. 1Var. 2Memory heat storage /Heat storage /

Efficiency and utilization countsSystem integration is importantEx. PV system / solar power usage (overfeeding)9,9 kWpalignment:East 10 + south 13 + west 105,2 kWpalignment: south-west 32Own efficiency about 50%Energy saving about 60%Electricity costs reductionwith electricity sales 95%+ battery storage 6,4 kWhOwn efficiency about 30%Energy saving about 20%Electricity costs reductionwith electricity sales 45%

Var. 1Var. 2

Efficiency and utilization countsCombination of systemsEx. PV-conditioning / heat pump / solar thermal system8,2 kWp PValignment: south 3410 m solar thermalSelf-efficiency PV 12%Percentage of e-energy and thus Energy saving about 80%(For PV power, ST-heat, WP-heat)Energy costs per annum 680, - (For House-power, WP-electricity, heat) With electricity sales approximately -550, - 9 kWHeat pump(air / water)

Efficiency and utilization countsCombination of systemsEx. PV system / Electric storage heaters / electric storage for hot water9,9 kWpalignment: East West 30Home-ManagerSelf-efficiency PV 40%Percentage of e-energy and thusEnergy saving about 50%(For PV power, PV-thermal, PV WW)electricalstorage heaters 8 kWelectricalunderfloor heating 0,6 kWelectric storagefor hot water2-6 kWsummaryconsider local situation objective: use the variety of possibilitiesusing Renewable Fuels objetive: Goal: no costs for energyDevices with high efficiency objective: high efficiency at partial loadintegrate systems efficiently objective: high efficiency!combine systems smart objective: low energy / operating costs!

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Think cross!And have fun!Thank you for your attention

energy cooperative & wind energyJakob Schfer, Murrhardt, Germany

16Aims of presentationcitizens energy cooperative in Murrhardt (EGM)role of citizens energy cooperatives in Germanyplanned wind farm project in Murrhardt (Zollstock-Springstein)

citizens energy cooperative MurrhardtCitizens solar power plants in Murrhardt since 2008in the legal form of a limited partnershipshares available to hold from ~800 onwardsclassical investment into renewable energysecurity through guaranteed feed-in tariff

in total 6 facilitiesinstalled production capacity (kWp):20, 22, 52, 20, 8, 32 (each in kWp)in total 154 kWpabout four weeks before Fukushimaenergy cooperative Murrhardt (EGM) eGfounded on 15 February 2011in the legal form of a cooperativeshares available to hold from ~76 onwardsavailability for more members to participate through low costs

agenda since 2011Commitment in tender for new operator of the power grid in Murrhardttarget not reachedCommitment in Murrhardts all new electricity grid operating companytarget not reachedDistribution of electricity through own local brand (support through partner company with experience in deregulated power market)target reachedboom of energy cooperatives in Germanywithin ten years growth from ~ 50 to over 550

recent projects and initiativesbrief overview of dates in german energy policyagreement 2002 to leave nuclear technology in Germanyextensional use agreed in 2010few months later roll-back after Fukushima in March 2011Energiewende and last shut down of german nuclear power plant in 2022 new provincial government in our province since 2011complete change in provincial policy regarding use of wind energy

location of planned wind farm6 turbinesNordex N 117 (2,4 MW)3 Mio. per turbineconsortium of various shareholdersestimated time of building permit:December 2014

Photo / picture

visualization of the Springstein hill in Murrhardtview from Siebenknie to Springstein (everything within Murrhardt municipality)

Conclusionunexpected difficulties with state authorities hits our energy cooperative Murrhardt hardstill no clearance when building permit to expectdifficult to establish a profitable energy cooperative in Murrhardtnevertheless engagement for climate justice with climate summit Paris 2015 in mindstrong will of civil society to move the energy sector in a innovative way forward