A novel modelling approach for condensing boilers based on hybrid dynamical systems

Satyavada, H.; Baldi, S.

doi:10.3390/machines4020010

A novel modelling approach for condensing boilers based on hybrid dynamical systems

Title

A novel modelling approach for condensing boilers based on hybrid dynamical systems

Author

Satyavada, H. (Student TU Delft)
Baldi, S. (TU Delft Team Bart De Schutter)

Date

2016

Abstract

Condensing boilers use waste heat from flue gases to pre-heat cold water entering the boiler. Flue gases are condensed into liquid form, thus recovering their latent heat of vaporization, which results in as much as 10%–12% increase in efficiency. Modeling these heat transfer phenomena is crucial to control this equipment. Despite the many approaches to the condensing boiler modeling, the following shortcomings are still not addressed: thermal dynamics are oversimplified with a nonlinear efficiency curve (which is calculated at steady-state); the dry/wet heat exchange is modeled in a fixed proportion. In this work we cover these shortcomings by developing a novel hybrid dynamic model which avoids the static nonlinear efficiency curve and accounts for a time-varying proportion of dry/wet heat exchange. The procedure for deriving the model is described and the efficiency of the resulting condensing boiler is shown.

Subject

hybrid modeling
condensing boiler
heat transfer
OA-Fund TU Delft

To reference this document use:

http://resolver.tudelft.nl/uuid:629489dc-ecb5-47a5-b26c-5ef6f20afabd

DOI

https://doi.org/10.3390/machines4020010

ISSN

2075-1702

Source

Machines, 4 (2)

Part of collection

Institutional Repository