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Kind of?

Despite what others said, temperature is not actually your problem. Pressure is. The pressure on surface is over 90 times what you want inside your habitats. Not to mention that pressure comes in the form of super critical carbon dioxide at 740 kelvins.

What this means is that the ratio of temperature difference is smaller than the ratio of pressure difference. So if you find a way to deal with the pressure, the heat won't be an issue.

I'd go for a plant that uses power to de-pressurize the supercritical carbon dioxide. Then give your habitat multiple pressurized shells with inner shells having progressively more survivable pressures. This is not mechanically as good as one shell but it would be easier to construct and if you fill the intermediate shells with de-pressurized carbon dioxide you will also get cooling "for free". For as long as the power plant works and carbon dioxide gets cycled anyway. You could also extract some water from the carbon dioxide. Probably not much but given that you'd want the habitat very well sealed anyway, maybe enough?

Some limitations on your power plant would apply though. If the power is produced with a heat engine of any kind or in general with a process that relies on temperature difference, you cannot use the cooling to create that temperature difference and then use the power produced to run the cooling. Well, you can, but you might have to name your colony the barony of Münchhausen for it to work.

Still, nuclear reactions can produce high enough temperatures for it to work even with cold end at 740 kelvins and other energy sources are possible. Maybe that supercritical carbon dioxide has flows that you can extract energy from?

In any case you'd probably need lots of power. And good redundancy with it.

The lava tubes are not really doing anything for you. Except trapping you underground and under a sea of supercritical carbon dioxide if things go wrong. I'd go for a rig or ship that floats in the carbon dioxide instead. Much easier to evacuate to those cloud top bases or to supply or build. And it can be moved.

Kind of?

Despite what others said, temperature is not actually your problem. Pressure is. The pressure on surface is over 90 times what you want inside your habitats. Not to mention that pressure comes in the form of super critical carbon dioxide at 740 kelvins.

What this means is that the ratio of temperature difference is smaller than the ratio of pressure difference. So if you find a way to deal with the pressure, the heat won't be an issue.

I'd go for a plant that uses power to de-pressurize the supercritical carbon dioxide. Then give your habitat multiple pressurized shells with inner shells having progressively more survivable pressures. This is not mechanically as good as one shell but it would be easier to construct and if you fill the intermediate shells with de-pressurized carbon dioxide you will also get cooling "for free". For as long as the power plant works and carbon dioxide gets cycled anyway. You could also extract some water from the carbon dioxide. Probably not much but given that you'd want the habitat very well sealed anyway, maybe enough?

Some limitations on your power plant would apply though. If the power is produced with a heat engine of any kind or in general with a process that relies on temperature difference, you cannot use the cooling to create that temperature difference and then use the power produced to run the cooling. Well, you can, but you might have to name your colony the barony of Münchhausen for it to work.

Still, nuclear reactions can produce high enough temperatures for it to work even with cold end at 740 kelvins and other energy sources are possible. Maybe that supercritical carbon dioxide has flows that you can extract energy from?

In any case you'd probably need lots of power. And good redundancy with it.

Kind of?

Despite what others said, temperature is not actually your problem. Pressure is. The pressure on surface is over 90 times what you want inside your habitats. Not to mention that pressure comes in the form of super critical carbon dioxide at 740 kelvins.

What this means is that the ratio of temperature difference is smaller than the ratio of pressure difference. So if you find a way to deal with the pressure, the heat won't be an issue.

I'd go for a plant that uses power to de-pressurize the supercritical carbon dioxide. Then give your habitat multiple pressurized shells with inner shells having progressively more survivable pressures. This is not mechanically as good as one shell but it would be easier to construct and if you fill the intermediate shells with de-pressurized carbon dioxide you will also get cooling "for free". For as long as the power plant works and carbon dioxide gets cycled anyway. You could also extract some water from the carbon dioxide. Probably not much but given that you'd want the habitat very well sealed anyway, maybe enough?

Some limitations on your power plant would apply though. If the power is produced with a heat engine of any kind or in general with a process that relies on temperature difference, you cannot use the cooling to create that temperature difference and then use the power produced to run the cooling. Well, you can, but you might have to name your colony the barony of Münchhausen for it to work.

Still, nuclear reactions can produce high enough temperatures for it to work even with cold end at 740 kelvins and other energy sources are possible. Maybe that supercritical carbon dioxide has flows that you can extract energy from?

In any case you'd probably need lots of power. And good redundancy with it.

The lava tubes are not really doing anything for you. Except trapping you underground and under a sea of supercritical carbon dioxide if things go wrong. I'd go for a rig or ship that floats in the carbon dioxide instead. Much easier to evacuate to those cloud top bases or to supply or build. And it can be moved.

1
source | link

Kind of?

Despite what others said, temperature is not actually your problem. Pressure is. The pressure on surface is over 90 times what you want inside your habitats. Not to mention that pressure comes in the form of super critical carbon dioxide at 740 kelvins.

What this means is that the ratio of temperature difference is smaller than the ratio of pressure difference. So if you find a way to deal with the pressure, the heat won't be an issue.

I'd go for a plant that uses power to de-pressurize the supercritical carbon dioxide. Then give your habitat multiple pressurized shells with inner shells having progressively more survivable pressures. This is not mechanically as good as one shell but it would be easier to construct and if you fill the intermediate shells with de-pressurized carbon dioxide you will also get cooling "for free". For as long as the power plant works and carbon dioxide gets cycled anyway. You could also extract some water from the carbon dioxide. Probably not much but given that you'd want the habitat very well sealed anyway, maybe enough?

Some limitations on your power plant would apply though. If the power is produced with a heat engine of any kind or in general with a process that relies on temperature difference, you cannot use the cooling to create that temperature difference and then use the power produced to run the cooling. Well, you can, but you might have to name your colony the barony of Münchhausen for it to work.

Still, nuclear reactions can produce high enough temperatures for it to work even with cold end at 740 kelvins and other energy sources are possible. Maybe that supercritical carbon dioxide has flows that you can extract energy from?

In any case you'd probably need lots of power. And good redundancy with it.