I am a designer (mechanical engineer) who works for a fire company. My boss asked me to develop and build a new door handle and lock mechanism. Which I did successfully. It has a 16mm Solid vertical handle on the right of the door.
My boss came and viewed the work the first thing out of his mouth was "We will need a hollow handle so that it doesn't get as hot." At this point we had a discussion as to whether changing the handle from solid to hollow would change the maximum temperature.
I argued that by only changing from solid to hollow none of the heat transfer mechanisms will decrease (convection, conduction & radiation) and that only the time it takes to reach maximum temperature (or ambient) will change.
If I am wrong can you please explain why. It just seems like I have the correct answer here.
Thank you for your time.
Not too sure if all the people who answered this will see this I hope so. Thanks for your time.
Your answers were very good and what I expected. I totally agree a solid handle stores more energy. Which when touched will be available for transfer into your hand and the longer the handle is touched the more of this energy gets transferred and the more the user gets "burned". Veritasium did a great youtube video on this.
Fun fact, in the fire standards there is no maximum temperature requirement for any part of the fire, be it being touched by the user or not.