- #1
rlingineni
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I am an amateur in engineering and new to this forum, so please excuse me if I am posting this in the wrong location. I am doing a little project outside of school that deals with water generation.
The project consists of a coolant that travels through a network of pipes and cools a coil to a desired temperature. For my coolant I am using dry ice(solid Carbon Dioxide), because it directly sublimates from a solid into a gas.I ran into a little problem during the execution of my project. Basically, what happened was, when I placed the dry ice within my containment chamber( which by the way is a homemade flask that consists of a water bottle placed within a 2 liter bottle with the gaps filled in by insulation foam), the rate of sublimation was too slow to spread through the entire network of tubes and cool the coil.
As a result, I need to somehow make make the cool air travel through the tubes. I have also considered the application of a fan, but it seems impractical on a large scale to use a battery and its not really applicable for an experiment that is meant to be low cost. So I explored the idea of adding air via a bicycle pump into the chamber and "pressurizing" it to force the cool air into the tubes and cool the coils. That didn't work(BTW I am also using tire valve stems), in fact, I ended up overheating the bicycle pump, and exploding the tube off.
With that in mind, I tried the same experiment in a more smaller environment, where I tried it with a simple water bottle and I observed that the bottle expands when the air is pumped but then contracts when the cylinder within the pump moves up. Essentially, I was expecting the bottle to work like a pressurized inner tube releasing air at a high force.
As a result, I retried the experiment but with one little change, I filled the bottle half with water and pumped air into it, and pressure began to build to the extent where the bottle would eventually burst. I want to know why this happened(water vs empty bottle) and also can anyone suggest to me how I may circulate air within the tubes without the use of a fan?
*Sorry I wrote a lot, Thank you in advance
The project consists of a coolant that travels through a network of pipes and cools a coil to a desired temperature. For my coolant I am using dry ice(solid Carbon Dioxide), because it directly sublimates from a solid into a gas.I ran into a little problem during the execution of my project. Basically, what happened was, when I placed the dry ice within my containment chamber( which by the way is a homemade flask that consists of a water bottle placed within a 2 liter bottle with the gaps filled in by insulation foam), the rate of sublimation was too slow to spread through the entire network of tubes and cool the coil.
As a result, I need to somehow make make the cool air travel through the tubes. I have also considered the application of a fan, but it seems impractical on a large scale to use a battery and its not really applicable for an experiment that is meant to be low cost. So I explored the idea of adding air via a bicycle pump into the chamber and "pressurizing" it to force the cool air into the tubes and cool the coils. That didn't work(BTW I am also using tire valve stems), in fact, I ended up overheating the bicycle pump, and exploding the tube off.
With that in mind, I tried the same experiment in a more smaller environment, where I tried it with a simple water bottle and I observed that the bottle expands when the air is pumped but then contracts when the cylinder within the pump moves up. Essentially, I was expecting the bottle to work like a pressurized inner tube releasing air at a high force.
As a result, I retried the experiment but with one little change, I filled the bottle half with water and pumped air into it, and pressure began to build to the extent where the bottle would eventually burst. I want to know why this happened(water vs empty bottle) and also can anyone suggest to me how I may circulate air within the tubes without the use of a fan?
*Sorry I wrote a lot, Thank you in advance