I'm not in an apartment, but I brew indoors. To chill, I use a cooler filled with ice water and a submersible pond pump to push cold water into my chiller with the return going back into the cooler. I collect ice from the icemaker in my fridge into a plastic bag until I have around 20 pounds, which I store in my chest freezer until needed, along with a dozen of those freezeable "blocks" designed for coolers which I put in the freezer 2 days prior to brewing, and that allows me to chill to pitch temp with my Brewzilla supplied chiller (stainless steel and not the most efficient) in around 20 minutes.
Bonus is that the water left in the cooler is my cleanup water and then gets dumped on the wife's climbing roses, so I basically get three uses out of the same water....that's important to Arizona folks....
YMMV
Lon