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Temperature Time to Rise Calculator

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  • Temperature Time to Rise Calculator

    Oven Builders:

    I've created an excel spreadsheet that will calculate the time it will take for the oven you are building to reach a desired temperature. All you do is enter the internal oven dimensions, the starting room temperature, the desired curing temperature and the total element wattage into the yellow boxes. The spreadsheet will then display the time to reach that temperature in the green box. It also displays how many amps an oven of that wattage will draw.

    This calculator is based on an oven built with metal interior and exterior walls and 2" of mineral wool insulation.

    This should help everone to have realistic expectations on how quickly their oven will reach working temperature.

    Ken
    Attached Files

  • #2
    Re: Temperature Time to Rise Calculator

    This is a very good tool to use.
    My input values come up pretty close to how long it takes mine to reach the desired temperature.

    I have two suggestions:
    1) Make a legend so people know to only put data into the yellow fields. (Even though it is protected)
    2) Make it possible to change insulation thickness.

    I think it should be a sticky for sure though. Thanks for putting the effort out to come up with this spreadsheet. Wish it was here a couple of days ago when I was started a thread on warm up temps.

    Comment


    • #3
      Re: Temperature Time to Rise Calculator

      Yep, nice job. Fortunately I'm using Mineral Wool Insulation.
      Who says you can't teach an ole dog new tricks?

      Comment


      • #4
        Re: Temperature Time to Rise Calculator

        Sounds great...wish I had Excel...

        Comment


        • #5
          Re: Temperature Time to Rise Calculator

          I believe there is an Excel viewer that is shareware. I will look for it.

          As for the insulation, the amount and type you use will change the time slightly but as long as you are using some kind of insulation of appreciable thickness it's not going to have nearly the effect on the calculation that oven volume and wattage will have.

          In order for me to modify the program to account for insulation thickness, I'm going to need some real world data from you fine folks.

          If anyone has an oven, a temperature gauge and a stopwatch and is willing to provide feedback on how many minutes and seconds it took them to go from temp A to temp B along with the type and quantity of insulation they are using, I will be able to modify the program to account for different insulation.

          Thanks!

          Ken

          Comment


          • #6
            Re: Temperature Time to Rise Calculator

            just wanted to say thanks for spending the time on this, its probly trivial with the temp controller ill be using, but it gives me a head up on what to expect. Also great for a future project i was thinking about... annealing oven

            Comment


            • #7
              Re: Temperature Time to Rise Calculator

              Hmm, cool. I'll have to compare with my oven. I have 10" fiberglass walls, but HardiBacker for internal walls. Havn't got all me elements in yet, 2 had to be special ordered. But, with experimenting with the 10,000W I have now, I think the HArdiBacker may have been the wrong choice. It takes to long to heat up. Basically it's like heating up concrete. Seems to stay hot along time once warmed, but slow to get there.
              Dan Pesonen
              Bandit Powder Coat <<From Powder to Perfection>>
              Forest Grove, BC Canada

              Personal motto:
              "If it ain't broke, modify somethin till it is"

              Comment


              • #8
                Re: Temperature Time to Rise Calculator

                For those that need excel and word and powerpoint etc. for free go to www.openoffice.org and get the free java version of the best microsoft office clone there is. You'll never use office again(unless you paid for it 80)
                Chris
                Suncook River Powder Coating

                Comment


                • #9
                  Re: Temperature Time to Rise Calculator

                  Originally posted by atroxr7
                  just wanted to say thanks for spending the time on this, its probly trivial with the temp controller ill be using, but it gives me a head up on what to expect. Also great for a future project i was thinking about... annealing oven

                  I may be of some help to you with regard to desired temperatures. Most of my paintbooths are 24' long, 11' high, 14' wide. They achieve 160 flat line in 4 minutes bringing in 10,000 CFM of 25 ambient air. These small ovens are toys to me. Call me and let me know what you would like to accomplish and i'll steer you in the right direction. You are probably using 220v electric heat or infra red. Qiet, but tooo sloww. You could probably use a small propane burner and get 600 degrees very fast, and with very accurate temps.

                  Eddie

                  Comment


                  • #10
                    Re: Temperature Time to Rise Calculator

                    All of the powder I've purchased from Caswell state on the label "Do not use in a Gas oven". I do not know why, perhaps someone can elaborate on that.

                    The majority of the ovens we build here on the forum are electrical powered ovens. 8' X 4' X 4' is the practical maximum size for an electrical oven and is large enough to powdercoat most hobbyist or small business parts.

                    One degree per second is achievable heat rise rates with our electic ovens and that is not too long of a heat rise rate for most people.

                    What kind of gas powered products can you offer us? Electric ovens are nice because you can build them yourself and achieve professional results without having to worry about carbon monoxide venting.

                    Tell us more.

                    Ken Cenicola
                    NHA Supply, LLC

                    Comment


                    • #11
                      Re: Temperature Time to Rise Calculator

                      It seems a little fast compared to my oven in reality. My oven takes about 45 min to heat to 400, But then, that's with 100+ metal silhouettes inside too. The spreadsheet said 34 min so 10 min off aint that bad at all.
                      Dan Pesonen
                      Bandit Powder Coat <<From Powder to Perfection>>
                      Forest Grove, BC Canada

                      Personal motto:
                      "If it ain't broke, modify somethin till it is"

                      Comment


                      • #12
                        Re: Temperature Time to Rise Calculator

                        Originally posted by kcenicola View Post
                        All of the powder I've purchased from Caswell state on the label "Do not use in a Gas oven". I do not know why, perhaps someone can elaborate on that.

                        The majority of the ovens we build here on the forum are electrical powered ovens. 8' X 4' X 4' is the practical maximum size for an electrical oven and is large enough to powdercoat most hobbyist or small business parts.

                        One degree per second is achievable heat rise rates with our electic ovens and that is not too long of a heat rise rate for most people.

                        What kind of gas powered products can you offer us? Electric ovens are nice because you can build them yourself and achieve professional results without having to worry about carbon monoxide venting.

                        Tell us more.

                        Ken Cenicola
                        NHA Supply, LLC
                        powder is plastic...plastic is flammable... plastic dust [powder] is extremely flammable....open flame or even a spark could ignite any arrant powder floating in the vicinity... granted.. you'd probably need a pretty high concentration in the atmosphere around you...but it IS possible

                        Comment


                        • #13
                          Re: Temperature Time to Rise Calculator

                          Thanks for the calculator. Do you have any updated formula on the calculate the time to rise calculator? I am not building an oven but need to know the same time for the space to rise when I have electrical gear in a room with known heat gain to the space. My walls are better insulated than the oven time calculator.

                          Comment


                          • #14
                            Re: Temperature Time to Rise Calculator

                            Originally posted by jeffmock View Post
                            Thanks for the calculator. Do you have any updated formula on the calculate the time to rise calculator? I am not building an oven but need to know the same time for the space to rise when I have electrical gear in a room with known heat gain to the space. My walls are better insulated than the oven time calculator.
                            I don't think you are going to find any such calculator and the creator of this spreadsheet hasn't posted anything in 3 years. There are so many factors in what you are asking for that it's virtually impossible imo to create a 'calculator' to accomplish this.

                            If you know the heat gain or btu, just provide equivilant cooling capacity.
                            Last edited by ed_denu; 11-30-2010, 10:15 PM.

                            Comment


                            • #15
                              i have 2500 x 2500 x 10000 L (Size in MM)oven now we want to changes in this oven. we need 3 deg cent. rise in one minute up to 140 Deg. cent from ambient. and also down 3 deg. c in one minute from 140 to ambient. No. of zone 10, No. of Fan 10. Please let me know Total KW (Electric Power) Requirement and CFM in the OVEN.

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