Leader

Collapse

Announcement

Collapse
No announcement yet.

New use for TIC

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • doughesson
    replied
    Originally posted by WaterbryVTfire View Post
    Well...I know where I am going to ask to ride in next years 4th of July parade.
    We used to be able to ride the hosebed and the midships station during the P-rades but that got halted last Memorial day and we now have to either ride in the cab or walk beside the rig.
    Since the hosebed is one of the better vantage points when you pass by a former female boss in her tank top(looks like Brooke Gordon with blue eyes.oobah-doobah),that really takes the fun out of going parading.

    Leave a comment:


  • Dave1983
    replied
    Originally posted by JTFIRE80
    The speed limit in front of the station is 25MPH. It's always fun to park the duty officer's vehicle on the front apron, and stand there with the TIC and pointing it at cars as they go by and watch the break lights come on!!
    Cool...Now I have 2 new things to try with the TIC.

    Leave a comment:


  • Lewiston2Capt
    replied
    Originally posted by firemanjb
    I am not a chemist, so I apologize if I have led people astray. However, when you take a container, such as LPG and run it, the container gets cold. I thought this is because the liquid is being heated (or absorbing heat from the cylinder) to boil and turn into a gas.
    That is some of it, but the expansion of the gas is also endothermic. Go here for some technical info on the JT effect.

    Leave a comment:


  • firemanjb
    replied
    Originally posted by Lewiston2Capt
    CO2 is a rare animal. The reason that the gas cools is through a process called Joule Thompson cooling or as we in the Industrial gas business call it the J-T Effect. As a gas expands it cools, the reason a can gets cold is because the heat is conducted through the metal warming the gas back up causing the metal to cool. That is why there is a rubber handle on the horn for the CO2 extinguisher. The CO2 in the extinguisher is partially liquid. As the gas is expelled from the extinguisher it decompresses cooling and thats where the dry ice snow comes from.
    firemanjb wasnt completely correct in his interpretation of what happens. The can cools because the gas cools it. Kind of like a heat sink in reverse.
    I am not a chemist, so I apologize if I have led people astray. However, when you take a container, such as LPG and run it, the container gets cold. I thought this is because the liquid is being heated (or absorbing heat from the cylinder) to boil and turn into a gas.

    Leave a comment:


  • WaterbryVTfire
    replied
    Originally posted by doughesson
    Nice going.The library just started allowing drinks in the place again and I sprayed my coke all over the screen watching that.Thanks for getting me bounced again.
    We used to use the TIC during parades for a more mature purpose:seeing whose were real and which ones were silicone.
    There is a discernable heat differential(boy,that's hard to spell)between the implants and the body's normal temperature.Gone are the days of wondering if you're admiring a hopefully legal woman or a couple bags of saline.
    Well...I know where I am going to ask to ride in next years 4th of July parade.

    Leave a comment:


  • Lewiston2Capt
    replied
    Originally posted by MarcusKspn
    From a physics Handbook:

    A very dramatic illustration of a gas cooling as it expands is the formation of dry ice from a carbon dioxide fire extinguisher. As the CO2 gas leaves the nozzle of the cylinder, it expands into the air and cools enough to solidify, forming dry ice. So why does the expanding gas cool?

    They would have both an extreme temprature and a dense particulate manner. And a fire station (if that is where the video was shot) would have extinguishers laying around.

    Maybe too much freetime during a practice class?
    CO2 is a rare animal. The reason that the gas cools is through a process called Joule Thompson cooling or as we in the Industrial gas business call it the J-T Effect. As a gas expands it cools, the reason a can gets cold is because the heat is conducted through the metal warming the gas back up causing the metal to cool. That is why there is a rubber handle on the horn for the CO2 extinguisher. The CO2 in the extinguisher is partially liquid. As the gas is expelled from the extinguisher it decompresses cooling and thats where the dry ice snow comes from.
    firemanjb wasnt completely correct in his interpretation of what happens. The can cools because the gas cools it. Kind of like a heat sink in reverse.

    Leave a comment:


  • MarcusKspn
    replied
    From a physics Handbook:

    A very dramatic illustration of a gas cooling as it expands is the formation of dry ice from a carbon dioxide fire extinguisher. As the CO2 gas leaves the nozzle of the cylinder, it expands into the air and cools enough to solidify, forming dry ice. So why does the expanding gas cool?

    They would have both an extreme temprature and a dense particulate manner. And a fire station (if that is where the video was shot) would have extinguishers laying around.

    Maybe too much freetime during a practice class?

    Leave a comment:


  • Lewiston2Capt
    replied
    Originally posted by firemanjb
    Actually, decompression is endothermic...meaning it absorbs heat. It cools the container, not the gas.

    Ruling out some bizarre emissivity issue, the reality is that a TI will not see gases unless: (1) they have an extreme temperature or (2) they have dense particulate matter.

    We know the first doesn't apply; we hope the second doesn't apply...which means that the video is the product of a creative digitial enhancement.
    Now you went and ruined all of the fun.

    I know that that if the camera can be tuned to the thermal absorbtion band of the gas in question it could be seen in theory. But that probably is not the case here. And I found your statements rather amusing.

    Leave a comment:


  • firemanjb
    replied
    Originally posted by MarcusKspn
    Black = Cold.

    Discharging a spray can (maybe the dust can for computers) decreases the pressure of the gas.

    Decrease in Pressure = Decrease in Temperature.

    Thats my theory in physics for today.

    My head hurts.
    Actually, decompression is endothermic...meaning it absorbs heat. It cools the container, not the gas.

    Ruling out some bizarre emissivity issue, the reality is that a TI will not see gases unless: (1) they have an extreme temperature or (2) they have dense particulate matter.

    We know the first doesn't apply; we hope the second doesn't apply...which means that the video is the product of a creative digitial enhancement.

    Leave a comment:


  • MarcusKspn
    replied
    Black = Cold.

    Discharging a spray can (maybe the dust can for computers) decreases the pressure of the gas.

    Decrease in Pressure = Decrease in Temperature.

    Thats my theory in physics for today.

    My head hurts.

    Leave a comment:


  • LFD1MICHAEL
    replied
    tic

    Originally posted by doughesson
    Nice going.The library just started allowing drinks in the place again and I sprayed my coke all over the screen watching that.Thanks for getting me bounced again.
    We used to use the TIC during parades for a more mature purpose:seeing whose were real and which ones were silicone.
    There is a discernable heat differential(boy,that's hard to spell)between the implants and the body's normal temperature.Gone are the days of wondering if you're admiring a hopefully legal woman or a couple bags of saline.

    That puts an entire new use to the TIC acronym. Ti*** Imaging Camera!

    Leave a comment:


  • JTFIRE80
    replied
    The speed limit in front of the station is 25MPH. It's always fun to park the duty officer's vehicle on the front apron, and stand there with the TIC and pointing it at cars as they go by and watch the break lights come on!!

    Leave a comment:


  • nozzelvfd
    replied
    That second bomb looked like a 4 alarmer.....LMAO...

    Leave a comment:


  • doughesson
    replied
    Originally posted by Catch22
    You just gave me a new project.
    It does sometimes concern people that think we are taking their picture and for some reason concentrating only on the women.Like Hunter S.Thompson said in"Fear and Loathing in Las Vegas","This is not the town to go pointing something that looks like a bazooka out the back window of a two door sedan."

    Leave a comment:


  • Catch22
    replied
    Originally posted by doughesson
    Nice going.The library just started allowing drinks in the place again and I sprayed my coke all over the screen watching that.Thanks for getting me bounced again.
    We used to use the TIC during parades for a more mature purpose:seeing whose were real and which ones were silicone.
    There is a discernable heat differential(boy,that's hard to spell)between the implants and the body's normal temperature.Gone are the days of wondering if you're admiring a hopefully legal woman or a couple bags of saline.
    You just gave me a new project.

    Leave a comment:

300x600 Ad Unit (In-View)

Collapse

Upper 300x250

Collapse

Taboola

Collapse

Leader

Collapse
Working...
X