An improved technique and its implementation for control of high power heaters in large autoclaves and similar plants

Kamalakannan, GM and Gupta, Amit Kumar (2010) An improved technique and its implementation for control of high power heaters in large autoclaves and similar plants. Journal of Instrument Society of India, 40 (2).

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Abstract

This paper presents an improved technique and its implementation for control of high power heaters in large autoclaves and similar plants. These plants are equipped with electrical heaters, which are grouped into number of banks to reduce the quantum of load/power change and improve operability, controllability and reliability. Conventionally, each heater bank is controlled through a power controller (usually Silicon Controlled Rectifier based). The total number of power controllers employed in a system will be equal to the total number of heater banks and they all share a common control signal provided by the temperature controller. While this is an obvious method, it is very expensive and results in decreased power factor and increased harmonic distortions. To overcome the above limitations, this paper explains a better technique; namely, ‘Heater Power Steering Logic (HPSL)’ and its implementation using Analog circuit and also using Programmable Logic Controller.

Item Type:	Article
Additional Information:	Copyright for this article belongs to Instrument Society of India
Uncontrolled Keywords:	Industrial automation and process control;Autoclave;PLC; Heater power control
Subjects:	CHEMISTRY AND MATERIALS > Composite Materials
Depositing User:	Ms. Alphones Mary
Date Deposited:	24 Jan 2012 04:26
Last Modified:	24 Jan 2012 04:26
URI:	http://nal-ir.nal.res.in/id/eprint/10274

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