Variable heat flux heat exchangers

a heat exchanger and variable heat flux technology, applied in the field of heat exchangers, can solve the problems of poor temperature control or oversized heat exchangers, the cooling power in one zone cannot be altered, and the reaction may progress too slowly and too quickly, and achieve the effect of uniform temperature profiles and ready-to-adap

a heat exchanger and variable heat flux technology, applied in the field of heat exchangers, can solve the problems of poor temperature control or oversized heat exchangers, the cooling power in one zone cannot be altered, and the reaction may progress too slowly and too quickly, and achieve the effect of uniform temperature profiles and ready-to-adap

US20090120629A1Inactive Publication Date: 2009-05-14ASHE MORRIS LTD
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  • Variable heat flux heat exchangers

Examples

Experimental program
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Effect test

Embodiment Construction

[0034]In this document, the material which is required to be heated or cooled within the heat exchanger is referred to as the ‘process material’. The process material may be a liquid, an emulsion, a super critical fluid, a vapour, a gas, a paste, solid particulates or a combination of these.

[0035]The phrase ‘process conduit’ refers to the space (such as channel, pipe, gap between plates etc) through which the process material flows.

[0036]The phrase ‘process conduit area’ refers to the cross-sectional area of the aperture through which the process material flows at a given point.

[0037]In this document, the phrase ‘uniform flow’ is used to describe a velocity profile of the process material passing through the process conduit (in a laminar or turbulent fashion) which is substantially constant across the face of the process conduit. It also implies that there are no pockets or dead spaces within the process conduit. The term ‘substantially’ is used because some variation in velocity wi...

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Abstract

A system for heat exchange is provided in which process material flows through a heat exchanger comprising multiple heat transfer stages and the heating and or cooling power applied to each stage can be modified independently. The system comprises a unitary heat exchanger comprising a heat transfer surface comprising a plurality of elements or zones over which a process material can flow wherein each element or zone has independent means to set or control the level of heating or cooling within that zone.

Description

BACKGROUND[0001]1. Field of the Disclosure[0002]This present disclosure relates to heat exchangers where the process material flows over a heat transfer surface. Typical examples include plate heat exchangers, shell and tube heat exchangers, drilled block heat exchangers, jacketed tanks, jacketed pipes, vessels with internal coils etc.[0003]The disclosure is particularly concerned with heat exchangers used for heating or cooling (or both) flowing materials where conditions change as the process material progresses through the heat exchanger (such as chemical reactions, polymerisation reactions, crystallisation, condensation, gas cooling etc). For example many chemical reactions are exothermic and have a rate of reaction which decays with time. Thus as a reacting fluid progresses through the heat exchanger, the rate of heat liberation also declines and hence requires less cooling (per unit volume of process fluid) if the process fluid is to be held at constant temperature. The disclo...

Claims

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Application Information

Patent Timeline
14 May 2009
Publication
US20090120629A1
IPC
F28F1/10; F28D9/00; F28F13/08; F28F27/02
CPC
B01J19/0013; B01J19/2415; B01J19/249; B01J2219/00015; B01J2219/00063; B01J2219/00094; B01J2219/00159; B01J2219/00202
Inventors
ASHE, ROBERT