UFH [Compatibility Mode]
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Transcript of UFH [Compatibility Mode]
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Floor Heating History:
Floor Heating System goes
back more than 2000 years;
ROMAN AGE
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Scene from the 3rd century BC
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2 reasons:
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Ideal Heating Floor Heating Ceiling Heating Radiator HeatingOuter Wall
Radiators HeatingInner Wall
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Heat profile for under floor heating is nearlyeat profile for under floor heating is nearlyideal:
Warm at feet, where blood circulation is poorest.
Temperate at head levels where body temperature ishighest.
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In contrast;n contrast;
Forced air systems & Radiator Systems concentrate heatorced air systems & Radiator Systems, concentrate heatnear the ceiling !!!L i h fl l !!!eaving the floor cool !!!
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ConclusionWe Feel Better With Warm Feet & a Cool Head
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The Result:
Comfort:Experience shows that even temperature
produced by radiant heat allows people toremain comfortable at 3 C lower overallroom tem erature.
Economic Operation:Where naturally, the heat losses & energycosts are cut down.
p
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Other Main Features:
Large Heating Surface:arge Heating Surface:
Which allows circulation of hot water at lowertemperature than in radiator systems.
& guarantees pleasant warmth by means ofmild radiant heat.
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Even heat distribution across the entire floor.
Where the heat is transmitted from all overthe entire space of the floor surface.
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No restriction on the placement of furniture.
Floor Heating gives total freedom to choosethe interior decoration arran ements withoutany restrictions.
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More stable moisture contents:
The air s not dehumidified, thus; leading to
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Enormous heat storage within the floor layers above the pipenetworksThis leads to:
Making periodic ventilation by opening windowsossible without si nificant loss of heatin efficienc .
Creating a self-balanced environment, because moret an 50% o t e eat trans er rom oor s t rougradiation;
, ,
lower the heat transfer would be.
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Less dust movement:ess dust movement:Because of two reasons:
More than 50% of the heat transferred is throughradiation, where in radiation no dust particles move.
The absence of the fans & blowers which eliminates, , .
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Maintenance free safe & long lasting:aintenance free, safe & long lasting:
Espec a y, w en us ng HENCO san w c p pes t atdo not corrode, & are 100% oxygen tight.
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Suitable for any power source & can be adapted with solarpanel energy systems, because of low temperature operation.
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Fuel Economy In Figures
The same physical ease & well being can be obtained in case of floor
heatin with 3C less room tem erature than in the case of radiator
heating.
This corresponds to 3/20 = 15% energy saving.
The radiant heat does not heat the ceiling as much as in radiator or
forced air systems, this means a further fuel saving of about 10%
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Thanks to the low temperature of the floor there are no thermal bridges
to s eak of.
Continuous o eration & entire s ace distributed heatin are also im ortant
factors to save energy;
for these two factors.
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The Result is:
35~40%
more econom c an ra a ors.
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UFH System Components:
HENCO Pipes.
.
Mixin Valves.
Room Temperature Controls.
Advanced Control Systems.
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Under Floor Heating Layers
Sand
Morter & Tiles
ScreedPipes 16 mmIron Mesh 5 mmAluminum Reflector
Foam ConcreteFoam Concrete
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Design Process:
.
Accordingly, we obtainQ/A(watt/m2 )
I f this value exceeds the maximum heat outputobtained from under floor heating,
then we should:
Improve the insulation.
Install an auxiliary System.
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Design Process:
28C - 29C --- Live area inside the room.
31C - 32C --- Surrounding areas and bathrooms.
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Design Process:
,
W/m2K
Accordingly, determine the average water temperature
T for each loo obtained from the curves.
Chose the designT = TS - TR Normally taken as 8C
Where: TS is water supply temperature.
TR
is water return temperature.
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Design Process:
- = a
-T = 8 C
Then:
TR = 40 - 8/2 = 36 C
S
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Design Process:
Head m H2O
The total pressure drop:
P (mbar)
The total flow rate:
m (l/s).
Flow rate m3/hr
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Design Process:
Calculate the total heat load forunder floor heating.
Add other extra loads such as;domestic hot water, other heatingnetworks, swimming pools, etc.
Safety factor should be addeddepending on the boiler efficiency.
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Installation Schemes:
Meander S stem S iral Method
Parallel System, Zig-Zag Method
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Meander System, with no border zone
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Parallel System, with no border zone
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Meander System, with one border zone
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Parallel System, with one border zone
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Meander System, with two border zones
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Meander System, with one border zone
Two loops
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Complete Layout example for under-floor heating.
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Enjoy The feeling of Floor Heating ...