Last summer, my friend and I decided to convert a large hole he had dug into a small underground facility where we could run our computers without having to worry about the noise. The bunker sides are reinforced with fiberglass panels with a 4x4" post at each corner, and has a roof made from two pieces of stainless steel sheet.
It tends to rain a lot in Washington, so we lined the sides with plastic, so if any water leaks in through the sides, it only runs down to the bottom where it is removed by a sump pump.
We ran power out to the bunker with an extension cord capable of supplying 15 A, and provided internet connectivity by configuring an old Linksys router with DD-WRT as a bridge. We have since obtained a remote antenna so that the receiver can be kept inside the bunker - safe from rain, dirt, and dog.
To moderate the humidity, we decided it would be a good idea to have something in the bunker that is always cooler than the surroundings. I constructed a makeshift ground source heat pump using 50 feet of HDPE hose, a Peliter module, an aquarium pump, a heatsink and water block, and a piece of plywood. The water is pumped from the reservoir through the water block, where it removes the heat transferred by the Peltier module. We buried the coil about six feet below the bottom of the bunker to absorb the heat. Water condenses on the heatsink and drips of into the pie tin, which directs the water into a hose and consequently into the sump bucket.
The bunker currently holds an HP Proliant server, two older Pentium D computers, and a small (mostly worthless) Bitcoin miner.
It's been raining pretty hard recently, and everything is still working as planned. (I still wouldn't put anything very expensive down there.)
It tends to rain a lot in Washington, so we lined the sides with plastic, so if any water leaks in through the sides, it only runs down to the bottom where it is removed by a sump pump.
We ran power out to the bunker with an extension cord capable of supplying 15 A, and provided internet connectivity by configuring an old Linksys router with DD-WRT as a bridge. We have since obtained a remote antenna so that the receiver can be kept inside the bunker - safe from rain, dirt, and dog.
To moderate the humidity, we decided it would be a good idea to have something in the bunker that is always cooler than the surroundings. I constructed a makeshift ground source heat pump using 50 feet of HDPE hose, a Peliter module, an aquarium pump, a heatsink and water block, and a piece of plywood. The water is pumped from the reservoir through the water block, where it removes the heat transferred by the Peltier module. We buried the coil about six feet below the bottom of the bunker to absorb the heat. Water condenses on the heatsink and drips of into the pie tin, which directs the water into a hose and consequently into the sump bucket.
The bunker currently holds an HP Proliant server, two older Pentium D computers, and a small (mostly worthless) Bitcoin miner.
It's been raining pretty hard recently, and everything is still working as planned. (I still wouldn't put anything very expensive down there.)