The small flow rate

My child came back to the cabin from school last week, and told myself and my wife something I’ve waited almost many years to hear. “Dad, can you help myself and others with my science fair project?” See, most parents would roll their eyes, sigh or flat-out refuse to help, leaving the other parent to help their kid–however me, on the other hand? I was obsessed with the science fair every since year I was in school, because I loved seeing all the cool or ridiculous projects that my classmates came up with. Needless to say, I couldn’t wait to see what my child wanted to do for his project! Then for a few ights, he struggled to come up with a great idea. Until a single hot Monday when our cabin’s central heating and air conditioning system went out of commission; it was the perfect opportunity to use the scientific method. Finally we could test my son’s question: what’s the most effective, cost-efficient way to cool down? Both of us started with his idea first, which was to locate a metal soup bowl full of ice in front of an oscillating fan. While it worked for a few minutes, the ice melted too fast for this to be an effective way to cool off. Next, my kid and I tried using ice water, as well as pushing it through a hose equipped with a special nozzle that would mist the chilly water in front of the fan… This worked incredibly well, but two concerns came from it– the mist dampened and eventually caused our clothes to get wet, and my son and I ran out of ice water too fast! Finally, with my supervision, my kid tried running a small flow of real R134 refrigerant that would disperse into the oscillating fan as well as be spread out through the room. This cooled down the entire room very suddenly, but the refrigerant was still too dense when it came out, as well as it was dangerous to breathe in for too long. Then ultimately, my child decided that the ice water plan was the best of the many options due to minimal steps in setup. It was a fun experience for both of us, as well as a good way to cool down parts of the cabin until the HVAC supplier came to service our AC unit.

more information