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    paulavon's Avatar
    paulavon Posts: 1, Reputation: 1
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    #1

    Nov 14, 2009, 02:51 PM
    Temperature control in a gas-fired oven
    I wish to find out a workable means for controlling the temperature at different times inside the drying chamber of a gas fired oven.I have thought about using a solenoid operated valve connnected to two thermostats.But I am not really sure how this will work
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #2

    Nov 14, 2009, 07:14 PM

    Can I ask a few questions:

    1. What is the BTU/hr ration of the oven?
    2. Input pipe size?
    3. Temperature range involved and typical tempertures?
    4. # of temperatures?
    5. What kind of sensor is used to measure the temperature now?
    6. How do you propose to change the teperatures? PLC?

    The solution I may propose may not be cheap.
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #3

    Nov 14, 2009, 08:18 PM

    If you/we can't find a suitable combustion control then using a mass flow controller would definitely work combined with a PLC. See: Modulating Gas Valve
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #4

    Nov 14, 2009, 08:27 PM

    This is easy enough for bang/bang control. http://customer.honeywell.com/techli...it/68-0039.pdf

    Proportional control would be harder.
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #5

    Nov 14, 2009, 08:52 PM

    Here is another idea, but they failed to mention what the PWM signal characteristics should be.
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