Analysis of Fired Equipment within the Framework of Low-Cost Modelling Systems
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Date
2019-02-07
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Mark
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Publisher
MDPI AG
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Abstract
Fired equipment suffers from local overloading and fouling of heat transfer surfaces,
products are not of the required quality, and operating costs are increased due to the high pressure
drop of process fluids. Such operational issues are affected by the non-uniform distribution of fluid
flow and heat flux variability. Detailed numerical analyses are often applied to troubleshoot these
problems. However, is this common practice effective? Is it not better to prevent problems from
occurring by using quality equipment design? It is, according to the general consensus. Still, the
experience of designing fired apparatuses reveals that the established standards do not reflect the real
maldistribution sufficiently. In addition, as found from the given overview of modelling approaches,
the radiant chamber and the convection section are usually analysed separately without significant
continuity. A comprehensive framework is hence introduced. The proposed procedure clearly defines
the interconnection of traditional thermal-hydraulic calculations and low-cost modelling systems
for radiant and convection sections. A suitable combination of simplified methods allows for the
reliable design of complex equipment and fast identification of problematic areas. The utilisation of
selected low-cost models, i.e., the second phase of the systematic framework, is presented regarding
the example of a steam boiler.
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Peer-reviewed
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en