Passive Solar and Low Energy Strategies

PASSIVE SOLAR AND LOW ENERGY STRATEGIES 6

PassiveSolar and Low Energy Strategies

Cousetittle

PassiveSolar and Low Energy Strategies

Initialgoals

Apassivesolardesignis one of themostcost-effective waystoreducehighenergyandfuelbillsthat integrates well with Craftsman plan . Agoodpassivesolarhomeprovidesenergysavingstrategiesthat reduceheatingandcoolingloads(Omer,2008).Whendesigninga passivesolarmodel,one should consider several factors. There must be a southfacingwindow,anditis importantto considerits size.Thesiteof thebuildingwith respectto obstructionsto sunandclimateis anotheraspectto consider(Keeler&amp Burke, 2013).Choosingexperiencedprofessionalson passivesolarhomeswill givethebestof an energysavingsystemthus,itis goodto choosean expert.

Additionalanalyses

Itis goodto considerthewindowsin thehouse.Theyare importantsincetheyactas anentranceforthesunthat is thebasicfacilitator of a passivesolarhome.There should be at leastone windowfacingthesouth.Orientationof thewindowis veryimportant.There should be noobstructionspreventingthe heat and light fromsunfrom enteringthebuilding.Ifcurrently, there are noobstructions,itisgoodto considerthecaseof futureobstructionssuchas multi-story buildingorsmalltrees growingtallconsider (Keeler&amp Burke, 2013).Forinstance,in orderto havenaturallightthroughout theyear,itis goodto placeone`s housein a solarprotectedarea.Ifsuchan areais not available,itis goodto searchforaslotthat is deepfrom northto southandpositionthehouseon thenorthernendof thatslot.Thus,itis importantto considertheorientationof thesouthfacingwindowas wellas obstructionsthat can blockthesun.

Awell-planned passivesolarhomecan providelightthewholeyearandcomfortduring thecoldseason.Itis importantthusto considera well-experiencedpassivesolararchitectorbuilderwhoshould designthispassivesolarhome.Aprofessionalwill determinetherightpassivesolarfraction.By Ensuring thattheidealfractionismet,one getsthefullbenefitsfrom a passivesolarhouse.Whenproperlydesigned,passivesolarbuildingsare brightandsunnyandgetalong with changesof climateandnature.

Asuccessfulpassivesolarhouseconsists of well-oriented windows,thermalmass,distributionmechanismandcontrolstrategies.Properly oriented, southfacingwindowscollectthesunlight.Thesouthfacingwindowsensuresmaximumsunexposureduring allseasons.There should be noblocking during theheatingperiodby otherbuildingsortrees consider(Keeler&amp Burke, 2013).Windowsblockingduring fall,springandcooling seasonavoidsoverheating.

Distributionmechanismof thestoredsolarenergyis through convection andradiation.Theheatspreadsby convection from warmerareasof theroom,tolesswarmareasof theroom.Radiationalsodistributesheatin theroom.Forinstance,whenpeoplestandnextto a sunnywindowtheycan feeltheheaton theskin.Thisheatreachesthem by radiation.Conduction also distributesheatwhentheheatedfloorwarmsone’s feet(Keeler&amp Burke, 2013).Fansthat blowup thewarmairto coldpartsof theroomdistribute the heat.Itis importantto considerDarker colorsin makingthethermalmasssince darker colorsare betterheatabsorbers comparedto lightercolors.

Sunintensityis irregularandthusthere must be controlsystemsto avoidoverloading.Ifthesystemoverloads, that can affectsomeelectrical appliancesincludingairconditioners andcomputers.Roofoverhangscan actas a shadeto thesouthwindowswhennecessary.Athermostat to turnoff thefuncan alsobeuseful.

Theclimateof theplaceis importantwhenconsideringa passivesolarsystem.In someclimates,there are clearskiesduring thewinter.In theseclimates,usingothermethodsof heatingprovesto be veryexpensivebutpassivesolarsystemwhenusedprovesto be moreeconomical.Houseswith largeglassareamay overheatin hotclimates(Rehfeld,2012).Thus,itis imperativetofactor in thesizeof thewindows.

Toolsavailablefortheanalysis

Thereare severaltoolsusedby professionalsin thisanalysis.Solarpathfinderis one of them. Thisinstrumentsaveslotsof timeandguesswork. Ithelpsdeterminetheshadowpositionsduring theday.If,forinstance,one doesnot usethisinstrument,itwill takethewholedayto observetheshadowmovement.Guesswork may leadto poorlocationof thesouthwindowsespeciallywheretheenvironmentis not muchclear,andthere are a fewpotentialshades(Rehfeld,2012).Guesswork in thiscaseprovesto be veryexpensive.Solarenergycalculatoris anothergadgetforuse.Itassistsin estimatingthecostof buildingup thesystemandthebillsavingsthesystemwill generate.

Theskyviewapp to dosolarshading surveysis anothertoolusedforthisanalysis.Thisapplicationin iPhones is usefulin doingsolarsurveyto findobstaclesthat shadethesouthfacingwindows.Itis an easyto useapplication.Whenon theproposedposition,panacross thehorizonafter settingthetimeanddateandthepathof thesunlightappears on thescreen.Sunchartis anothertoolthat can be useful.Itdetermineshowmuchof thetimethesunshineson thewindows.Brightharvestsolarsurveyis anothertoolbased on aerialphotos. Ittakesdigital modelof thehousetogetherwith thenearby possibleshades.

Pointsassessed

Thematerialsin buildingthehousemust be up to therequiredspecificationsforefficientsystem.An exteriormasonrywallwith insulationon theinsideis mostpreferred.Thethermalmassshould havehighemissivity, moderateconductance andhighheatcapacity.Forexample,woodwould not makea goodthermalmaterialsince ithas lowheatstoragecapacityas wellas lowconductivity. Woodwould releasetheheatprematurelyinsteadof storingit.Steelhas highheatstoragecapacity,butithas highconductivity (Rehfeld,2012).Steel&nbsplosestheheatstoredto theenvironmentvery quicklyhencereducingthetimeforpeopleto enjoygoodtemperaturesfora longperiod.Glass has highheatstoragecapacitybutits transparencyseemsto allowinfrared radiation,which in excessis harmfulto theskin.Iftheglasshas brightcolor paint,its abilityto absorbradiationreducesandbecomesineffectiveduring thecooling season.

References

Keeler,M., &amp Burke, B. (2013). Fundamentalsof integrated design for sustainable building.John Wiley &amp Sons.

Omer,A. M. (2008). Energy, environment and sustainable development.Renewableand sustainable energy reviews,12(9),2265-2300.

Parry,D. H. (1952). The logical approach to the problems of space warmingby electricity. Proceedingsof the IEE-Part I: General,99(120),233-243.

Rehfeld,B. (2012). HomeSweet Zero Energy Home: What it Takes to Develop Great Homes thatWon`t Cost Anything to Heat, Cool Or Light Up, Without Going Broke OrCrazy.New Society Publishers.

Thorpe,D. (2013). SolarTechnology: The Earthscan Expert Guide to Using Solar Energy forHeating, Cooling and Electricity.Routledge.