TECHNICALS DATAS:

The heating element MASSALIA for the elevation of temperature of the pipelines, some tubings or some vats is nourished in current low tension 220 Volts. The diffusion of the calorific energy is made by conduction and radiance, allowing to guarantee the out frost of the pipeline to the fr ee like buried air. The elevation of the temperature is function of several criterias who is to determine.

 

The determination of the dwindles linear measure of a freestanding conduct is data by the applicati on of the simplified following formula.

 

 

 

 

With:

 

• Phi dwindle linear measure of the conduct in Wm-1.
• T temperature of fluid elated in °K.
• T'temperature of the air to the outside of the conduct in °K.
• h coefficient of superficial external exchange in W m+2\°k-1.
• Lambda coefficient of thermal conductivity of insulatesWm-1\°k-1.
• Ri outside radius of tube or vat in m.
• Re outside radius of insulates in m.
• Log Népérien logarithm.

Coefficient h:

The determination of h coefficient of exchange superficial outside depends:

• of the nature of fluid ambient.
• of his temperature.
• of his speed.
• of the position of the tubing.
• of his nature.

Generally, in the case of the ambient air and in disregard ing the radiance (freestanding tubing) one could use the simplified following formula:

With

• h coefficient of superficial external exchange in W m+2\°k-1.
• d outside diameter of the conduct in m.
• T' temperature of the ambient air in °C.

In exercises, one will take:

h = 10 Wm+2 K-1 per one tubing in shop. H = 24 Wm+2 K-1 per one tubing to the outside.

Coefficient LAMBDA:

The thermal conductivity in LAMBDA Wm-1°k-1 .example

• Wool of rock to 0°C 0.035
• Wool of rock to 0°C 0.043
• Cork in shell to 0°C 0.037

COMPLEMENTAIRES LOSSES of the EQUIPEMENTS DE The TUBING. In order to take into account some particular dwindles to the accessories of a tubing, he is dresser of converting every equipment in length of pipeline supplementary example:

2 naked bridles of 2 at 3 m 1 naked floodgate of 6 at 9m

Value said of equivalent length some facilities. LENGTH EQUIVALENTE of The TUBING.

LEQ= own length of the tubing to draw + equivalent length some facilities.

DETERMINATION of the STRENGTHS INSTALLED FOR The TRACAGE

MAINTAIN In TEMPERATURE Of PRODUCT.

• Needs (dwindles).
• Installed Strength (Pi).

REHEATING Of A PRODUCT BEFORE PUTS In SERVICE

• Reheating of product in the tubing (without debit).
• Reheating of the tubing of transport (without product).
• Dwindle of the tubing= thermal Need.
• Total Strength of reheating necessary (P).
• Installed Strength (Pi).

HEATING Of A PRODUCT In PERMANENT CIRCULATION

• Needs of heating of product.
• Dwindles of the tubing.
• Total necessary Strength to the heating.
• Installed Strength (Pi).

 

IMPLEMENTED:

An installation of elements heating MASSALIA puts directly on the surface to heat. He is counsel of gluing all the surface per one more homogenize. He is indispensable of covering the heating element of a thermal insulator. The MASSALIA elements could be easily stocked to dish or rolled up for example if it is necessary.

 

TECHNICALS DATAS:

 

The elements heating MASSALIA presents under the shape of gangs,width 400, 500, or 600 mm, length f rom 600 to 5 400 mm and of a thickness of 0.5 mm the strength by line is of 2300 W. His outside color is money. The electric links are insureds by NPI cables 1,5. besides the element is class II with a mechanical protection.

 

REGULATION: The element heating MASSALIA must be temperature regulation by thermostatic control.

 

WARRANTY: The warranty some heating element MASSALIA is of 2 years.

 

MASSALIA is an important reduction some constraints of installation with:

• The very reduced intervening.
• An immobilization of the very restricted places.
• An elevation of the controlled temperature and targeted.

COUNT of the FACILITIES. After survey, the strengths to install is definite in taking into account of the temperature, of time of wanted elevation and of the environment

 

INSTALLATION.

 

She must be achieved in the rules of the art in taking into account some regimentations in vigors for the protection of the people and of material. General protection by switch or by differential cutout 30 my by slice of 7.5 kW in mono and of 13 kW in tétra.