Heating circuit

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Heat­ing cir­cuit is the ab­bre­vi­at­ed term for heat­ing cir­cuit and refers to the me­dia-car­ry­ing line sys­tem in heat­ing and heat­ing tech­nol­o­gy. The pipe sys­tem of the heat­ing cir­cuit can con­sist of pipes, hoses or ducts and can reach high geo­met­ric com­plex­i­ty de­pend­ing on the ap­pli­ca­tion — for ex­am­ple in the re­al­iza­tion of tem­per­a­ture con­trol sys­tems for form­ing tools. Me­dia of the heat­ing cir­cuit can be wa­ter, oils, very rarely air and the like.

How is a heating circuit structured?

The heat­ing cir­cuit starts with the heat source. It can be a boil­er, so­lar sys­tem or some­thing else. The heat is dis­trib­uted through the sys­tem by a heat car­ri­er. Heat car­ri­ers are me­dia such as wa­ter, which can ab­sorb and store heat well. Through a pow­er sys­tem, the heat­ed medi­um trav­els from the heat source to the point of use. Once there, the heat trans­fer medi­um re­leas­es the heat to the de­sired en­vi­ron­ment and re­turns to the heat source. There­by the heat­ing cir­cuit is di­vid­ed in­to 2 ar­eas which can be dis­tin­guished. The area from the heat source to the point of use is called the flow. The tem­per­a­ture that the medi­um has on this way is called flow tem­per­a­ture. The area from the point of use back to the heat source is called the re­turn. The tem­per­a­ture of the medi­um on this path is called the re­turn tem­per­a­ture. The dif­fer­ence tem­per­a­ture be­tween the sup­ply and re­turn is de­scribed as the spread. Heat­ing cir­cuits are usu­al­ly op­er­at­ed by means of a con­trol­lable pres­sure set­ting. Pumps are usu­al­ly used for this purpose.

Safety in the heating circuit

  • Ex­pan­sion ves­sels to ab­sorb the pres­sure gen­er­at­ed in the pip­ing system
  • Safe­ty valves that al­low the medi­um to flow out if the pres­sure in the pip­ing sys­tem be­comes too high

Insulation and insulation

To min­i­mize heat loss in the pip­ing sys­tem, good in­su­la­tion is im­por­tant for en­er­gy con­sump­tion and en­er­gy efficiency. 

Applications for a heating circuit

  • Un­der­floor heating
  • Clas­sic radiators
  • Cars and trucks

What is a molding tool?

A form­ing die is an elab­o­rate, two-piece struc­ture made of steel, alu­minum or cast iron, de­pend­ing on the ap­pli­ca­tion, and of­ten in­cludes com­plex tem­per­a­ture con­trol sys­tems and hot run­ner systems.

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