Dimplex ST0133 technical manual Where Vep System expansion volume

Page 33

Technical manual

SOLAR

The expansion volume of the system Vep can be calculated using Equation 7.

Vep = Vsys ⋅ β

 

[7]

Where: Vep

[l]

system expansion volume

Vsys

[l]

total system volume

β

[-]

heat transfer medium expansion coefficient (0.00085)

The pressure relief valve pressure prv can as first approximation be used as 6 bar. How- ever, to allow for some tolerance it is recommended to calculate the pressure relief valve pressure prv in accordance with Equation 8.

prv = pop ⋅ (1 − 0.1)

 

[8]

Where:

prv

[bar]

relief valve pressure

 

pop

[l]

opening pressure of relief valve (6 bar)

The last parameter to be calculated for use in Equation 5 is the cold fill pressure ppc of the system. The cold fill pressure ppc depends on the static height hstat of the solar thermal system and the required pressure in the highest system point pmin. The defini- tion of the static height hstat is depicted in Figure 33.

hstat

Figure 33 – Definition of static height of solar system

The pressure in the highest system point pmin should be between 1 and 1.5 bar. The cold fill pressure ppc can therefore be calculated as shown in Equation 9.

p

pc

= p

min

+ 0.1 barh

[9]

 

 

 

m

stat

 

Where:

ppc

 

[bar]

cold fill pressure

 

 

 

 

pmin

 

[bar]

pressure in highest system point

 

 

 

 

hstat

 

[m]

static height of system

Equation 9 concludes the calculation of parameters required for Equation 4 to calculate the expansion vessel volume VEV. To be able to commission the expansion vessel, the membrane pre-charge pressure pmp has to be calculated as shown in Equation 10.

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ST0133 – A 02/09

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Contents Solar Contents Solar Solar thermal Before you startGeneral IntroductionStrong UK and Ireland irradiation map horizontal surface OrientationSolar Components of a solar thermal system Solar thermal systemSolar thermal collector Pump and safety equipmentHeat transfer fluid Pipe workUser Function of a solar thermal systemDimplex solar products Dimplex solar collector SOLC220General description = η − a Hydraulic collector connection Absorber pipe work Dimplex SOLC220 collector Connection components Dimplex SOLC220 collector 325 330340 Roof fixing kits Dimplex Solar collector installation optionsRoof kits On roof kitsFree standing kits Free standing kit row distance calculation details Where mtot Minimum mass required Space requirement Space requirement Dimplex SOLC220 on roof installationTechnical manual Dimplex solar control unit SOLCU1/2/3 Technical dataTemperature sensors Dimplex solar pump unit SOLPU1/2 Components of Dimplex solar pump unit SOLPU1 and SOLPU2 Pump unit connections 1, 2, 10Bar pressure relief valve Non return ball valve, temperature gauge 5Pressure gauge Circulation pumpExpansion vessel fixing kit Flow meterAir purger and related components 11, 14 Insulation cover Pump connectionTechnical data Expansion vessel sizing Dimplex solar expansion vessels SolevWhere Vep System expansion volume Where pmp Bar Membrane pressure Dimplex expansion vessel fixing kit SOLVK1 Technical data Dimplex Solev expansion vesselsDimplex heat transfer medium SOLHT20 Technical data Dimplex expansion vessel fixing kit SOLVK1Dimplex solar cylinders SCx Technical data Dimplex solar heat transfer medium SOLHT20SCx175/215/255/305sd SCx175/215/255/305si Key features Dimplex solar cylinders SCx Wiring integration Dimplex solar cylinders SCxTechnical manual Technical manual Solar loop integration Hydraulic integration Dimplex solar cylinders SCxTechnical data Dimplex solar cylinder SCx ST0133 a 02/09 Pressure drop Dimplex solar SCx cylinder coils Dimplex solar accessoriesCorrugated flexible pipe SOLFH10/15 Feed through tiles Solftt and Solftm System sizing Required informationSizing guide Dimplex solar initial sizing guide ST0133 a 02/09 Pipe work Type of pipe workPipe work sizing Pipe work pressure drop Pipe work liquid contentPipe work insulation Pipe work fixationCommissioning Dimplex commissioning procedure Part ST0133 a 02/09Control unit OperationDisplay information and menu structure SOLCU1 ST0133 a 02/09 Pump unit MaintenanceCheck system pressure Check pipe work for leaksCheck roof feed-through for leaks Check content discharge vesselCheck condition of pipe insulation Check collector fixationsTechnical manual Product and kit listings Dimplex solar kitsDimplex solar components Technical manual Product implementation stage Dimplex literature structureOn site questionnaire AppendixOn site inspection Technical manual Technical manual Dimplex solar system direct overall view Dimplex solar system indirect overall view Example Dimplex solar simulation report Technical manual Technical manual Technical manual Technical manual Technical manual

ST0133 specifications

The Dimplex ST0133 is a sophisticated and efficient electric heating solution designed for modern living spaces. This product is an ideal choice for those seeking warmth and comfort without compromising on style or energy efficiency. The unit stands out due to its sleek design, making it a perfect fit for contemporary interiors.

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Moreover, this electric heater is easy to install and requires minimal maintenance, making it a practical choice for homeowners and businesses alike. Overall, the Dimplex ST0133 combines style, efficiency, and safety, making it a leading option in the realm of electric heating solutions. It is an intelligent investment for anyone looking to enhance their living space with reliable and modern heat.