Heat Storage Calculation Model for Supercritical Once-through Boilers

DOI

10.2991/icmra-15.2015.173How to use a DOI?

Keywords

Supercritical once-through boiler Heat-surface Heat energy storage

Abstract

According to the properties of water and steam, The evaporating surface of supercritical once-through boiler is divided into a cold-water section, a density-change section and a overheat- steam section for both supercritical and subcritical pressures. A lumped-parameter mathematical model was build up for the steam generator,separator, over-heater through mechanism analysis and model simplification, the heat energy storage under different loads is calculated based on the design data of boiler structure. Application results on a 1000 MW unit show that the variation of heat energy storage of the water/steam in risers under subcritical pressures is more than supercritical pressures, the metal's heat storage is much larger than the water/steam's, the over-heater's heat storage accounted for about 70% of the entire boiler's,The heat storage of boiler decreases with the pressure increasing.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Zhiming Qin
AU  - Junjie Gu
AU  - Luanying Zhang
PY  - 2015/04
DA  - 2015/04
TI  - Heat Storage Calculation Model for Supercritical Once-through Boilers
BT  - Proceedings of the 3rd International Conference on Mechatronics, Robotics and Automation
PB  - Atlantis Press
SP  - 889
EP  - 894
SN  - 2352-538X
UR  - https://doi.org/10.2991/icmra-15.2015.173
DO  - 10.2991/icmra-15.2015.173
ID  - Qin2015/04
ER  -