Passive_solar_greenhouse structure construction

About greenhouse types construction of the day liye hai bs usi ko pakde hue 1 mahina to be fine to nai bole use of mustard seed and small 🦐 to hai nahi to tushar k 😅😅😁 hai na ki hm v nai bole use of mustard oil to nai dunia me sab to hm kaafi baat kar raha hu

7. Ahotairgreenhouseheatingsystemdirectlywarmstheairinsidethegreenhouseusingheatedairforcedthrough
vents,ducts,orfans.Thiscontrastswithsystemsthatheatviaradiantsurfaces(likepipes)orroot-zoneheating.Here'sa
breakdownofitscomponents,types,pros,cons,andkeyconsiderations:
??????CoreComponents:
1.HeatSource:
1.Furnaces:Propane,naturalgas,oil,orbiomass(woodpellets/chips).Mostcommonforlargersetups.
2.ElectricHeaters:Resistanceheatersorheatpumps(air-source).Simplerbutoftenhigheroperatingcost.
3.UnitHeaters:Hangingheaters(typicallygas/propane)withbuilt-infans.
4.Boilerw/AirHandler:Aboilerheatswater,whichthenheatsairviaaheatexchangerandblower.
Hot air greenhouse heating system

8. 2.HeatDistribution:
1.PolyethyleneDistributionTubes(PolyTubes):Perforatedplastictubesrunningthegreenhouselength,
suspendedoverhead.Heatedairentersoneendandgentlyflowsoutthroughholes,ensuringevenheat
distributionwithoutblastingplants.
2.Ductwork:Rigidorflexibleductswithventsdirectingairflow.
3.Fans:Overheadhorizontalairflow(HAF)fanshelpcirculateheatedair,preventingstratification(hotair
rising,coldairsettling).
3.Controls:
1.Thermostats:Essentialforturningthesystemon/offbasedonsettemperatures.
2.StagingControls:Formulti-unitsystems,activatesadditionalheatersasneeded.
3.VentilationIntegration:Linkswithexhaustfans/ridgeventstopreventoverheating.
4.BackupAlarms:Alertsfortemperaturedropsorsystemfailure.

9. ⚙️Common System Types:
1.CentralForced-AirFurnacew/PolyTubes:Themostefficientsetupforevenheating.Furnaceblowshotairintoinlet
ofpolytubes.
2.UnitHeatersw/PolyTubesorFans:Individualheatersplacedstrategically,oftenblowingintopolytubesorwith
integratedfansforcirculation.
3.Direct-FiredHeaters:Combustfuelinsidethegreenhouse(propane/natgascommon).Requireexcellentventilationto
exhaustcombustiongases(CO,CO
2,ethylene,moisture).Oftenusedwithpolytubes.Lowerinitialcost,higherventilation
needs.
4.Indirect-FiredHeaters:Combustfuelinasealedchamber.Heatexchangertransfersheattocleanairblownintothe
greenhouse.Combustiongasesventoutside.Safer,moreefficientmoisturecontrol,higherupfrontcost.
5.ElectricForced-AirHeaters:Simple,clean,buthighoperatingcost.Suitableforsmallgreenhousesorbackup.