Upload & Sell: Off
Several of my many projects while a safety/quality engineer supporting NASA involved the ISS ammonia cooling system. That system could possibly be the death of the ISS. The main purpose was to eliminate the noise from cooling fans in the equipment areas. It was interesting watching what was a good idea grow a system to where it may not have been a good idea. First, because the ammonia chilled water for cooling, this increased the cost of equipment we built to be installed in the racks. The equipment had to have inlet/outlet quick disconnects (QD) that were 3 fault tolerant (you can't have nasty water leaking in electrical areas). There was only one company who made the QDs at the time and they charged $10k each, meaning the cost of the equipment was increased by $20k. (I actually wrote a technical letter to the NASA safety panel to get this changed. The safety chairman told me while the panel agreed with my analysis, they were not going to change the requirement.)
Then, ammonia, being ammonia, began to leak at the fittings. We manufactured tools Boeing designed for spacewalks to repair the fittings. Getting those simple tools approved for flight and used for Extra-Vehicular-Activity (EVA) were very high. Then they realized the leaking ammonia might contaminate the EVA suits and cause contamination in the airlock to the crew. One of our engineers was prototyping a hand held analyzer to sniff out various hazardous gas/liquid contaminates, including ammonia. NASA found out about the device and wanted to fly it...a prototype. The problem, this device lived on the engineer's desk (well actually it sat on his file cabinet), we had no parts traceability and no certifications for materials. I was directed to do a safety analysis and prepare a flight safety report to NASA so we could get a certificate for safety to fly on the Shuttle and ISS and to be used for EVA. I was last on the agenda for the safety presentation. Before I presented my analysis, the chairman cleared the room of all personnel leaving just him, the secretary, and me. My presentation to the safety chairman was basically void of every safety requirement and I presented it in a way where most any safety/technical person would have asked about 20 questions. I got none and the safety chairman signed the certificate of flight safety at the end of the meeting! It flew a few days later on the shuttle to the ISS.
When I worked in the refinery on a unit that used ammonia in the chillers to separate wax, the first thing the Stillman told me when we met was "if you smell ammonia, it's too late". (Two people had ammonia poisoning while I was there, one died.) I just think the ammonia idea is a catastrophe waiting to happen.