Rozdílné přístupy ke zlepšování výměny tepla v průmyslových aplikacích

Different Strategies to Improve Industrial Heat Exchange

journal article - other

en

A variety of different strategies are available to process and equipment designers to improve industrial heat transfer. These range from the use of efficient forms of individual heat exchangers to the optimum utilisation of the individual units in a network, generally referred to as process integration. This paper attempts to review these strategies with reference to the conventional and more recent forms of shell and tube heat exchangers. In the context of heat exchanger network process heat transfer intensification (global intensification) i.e. the network design for maximum energy recovery is first important step. This needs to be then combined with heat transfer intensification in individual units/shells (local intensification). The benefits of global and local intensification are illustrated with examples of helically baffled heat exchanger (Helixchanger), as a representative of more recent form of shell and tube exchanger. Some aspects concerning the use of multi-stream heat exchangers are discussed, and finally, an example for optimisation of a plate type heat exchanger is presented.

Ke zlepšování výměny tepla v průmyslových aplikacích je při návrhu procesů a zařízení k dispozici řada možností. Článek se věnuje přehledu strategií s důrazem na konvenční a současné přístupy v oblasti trubkových výměníků tepla. Je diskutováno několik aspektů týkajících se použití vícechodých výměníků a je uveden příklad optimalizace deskového výměníku tepla.

A variety of different strategies are available to process and equipment designers to improve industrial heat transfer. These range from the use of efficient forms of individual heat exchangers to the optimum utilisation of the individual units in a network, generally referred to as process integration. This paper attempts to review these strategies with reference to the conventional and more recent forms of shell and tube heat exchangers. In the context of heat exchanger network process heat transfer intensification (global intensification) i.e. the network design for maximum energy recovery is first important step. This needs to be then combined with heat transfer intensification in individual units/shells (local intensification). The benefits of global and local intensification are illustrated with examples of helically baffled heat exchanger (Helixchanger), as a representative of more recent form of shell and tube exchanger. Some aspects concerning the use of multi-stream heat exchangers are discussed, and finally, an example for optimisation of a plate type heat exchanger is presented.

výměník tepla, optimalizace

Heat exchanger, heat transfer intensification, optimisation.

01.01.2002

0145-7632

Heat Transfer Engineering

23

6

36–48

13