2 ms·

1.5kW for a room heater isn’t bad. In any case, I imagine that an industrial scale oxygen concentrator would be dramatically more efficient.

by amluto 4y ago

littlestymaar 4y ago
That's 1.5kW in exchange for 350W + the fuel. Whereas a heat pump gives you the same without the wood at all. (And a basic stove gives you the 1.5W for just wood without electricity nor complex and expensive machine). An industrial scale thing may be more energy efficient, but why bother when you can just get rid of the NOx with catalysis instead…
- amluto 4y ago
  Your average heat pump doesn’t burn wood, and wood is, in several respects, an excellent fuel. It’s renewable, it’s easy and safe to store, it’s dense, and it’s easy and safe to transport. (Yes, on a large scale, it’s better for everyone to use heat pumps. But heat pumps plus wood for backup in unusually cold weather may also be a good choice.) On an industrial scale, some form of nitrogen-free combustion may simplify CO2 capture. And, if a CO2-capturing plant needs to remove nitrogen from a gas stream, removing it from the intake stream instead of the exhaust stream may eliminate the need for catalytic reduction. Also, the intake gas is clean and cool, and there’s no risk of contamination the zeolite adsorption bed (or whatever gets used) with soot.
  - littlestymaar 4y ago
    > Your average heat pump doesn’t burn wood, and wood is, in several respects, an excellent fuel. It’s renewable, it’s easy and safe to store, it’s dense, and it’s easy and safe to transport. You don't understand: your heat pump roughly generate the same amount of heat without burning anything. Instead of feeding electricity to an oxygen concentrator, you feed it to your heat pump and tada! you have your heat without burning anything! > But heat pumps plus wood for backup in unusually cold weather may also be a good choice.) Sure, but in this case you just need a good stove, if that's only used occasionally then you don't care about a little bit of NOx. > On an industrial scale, some form of nitrogen-free combustion may simplify CO2 capture. Sure, but then it's a completely different topic, at least because a concentrator won't give you nitrogen-free gas, just 8 times less nitrogen, which may not be enough for the needs. CLC is probably better suited for that, or regular air distillation to get pure oxygen.

1.5kW for a room heater isn’t bad. In any case, I imagine that an industrial scale oxygen concentrator would be dramatically more efficient.

by amluto 4y ago

1.5kW for a room heater isn’t bad. In any case, I imagine that an industrial scale oxygen concentrator would be dramatically more efficient.

littlestymaar 4y ago

That's 1.5kW in exchange for 350W + the fuel. Whereas a heat pump gives you the same without the wood at all. (And a basic stove gives you the 1.5W for just wood without electricity nor complex and expensive machine). An industrial scale thing may be more energy efficient, but why bother when you can just get rid of the NOx with catalysis instead…

amluto 4y ago
Your average heat pump doesn’t burn wood, and wood is, in several respects, an excellent fuel. It’s renewable, it’s easy and safe to store, it’s dense, and it’s easy and safe to transport. (Yes, on a large scale, it’s better for everyone to use heat pumps. But heat pumps plus wood for backup in unusually cold weather may also be a good choice.) On an industrial scale, some form of nitrogen-free combustion may simplify CO2 capture. And, if a CO2-capturing plant needs to remove nitrogen from a gas stream, removing it from the intake stream instead of the exhaust stream may eliminate the need for catalytic reduction. Also, the intake gas is clean and cool, and there’s no risk of contamination the zeolite adsorption bed (or whatever gets used) with soot.
- littlestymaar 4y ago
  > Your average heat pump doesn’t burn wood, and wood is, in several respects, an excellent fuel. It’s renewable, it’s easy and safe to store, it’s dense, and it’s easy and safe to transport. You don't understand: your heat pump roughly generate the same amount of heat without burning anything. Instead of feeding electricity to an oxygen concentrator, you feed it to your heat pump and tada! you have your heat without burning anything! > But heat pumps plus wood for backup in unusually cold weather may also be a good choice.) Sure, but in this case you just need a good stove, if that's only used occasionally then you don't care about a little bit of NOx. > On an industrial scale, some form of nitrogen-free combustion may simplify CO2 capture. Sure, but then it's a completely different topic, at least because a concentrator won't give you nitrogen-free gas, just 8 times less nitrogen, which may not be enough for the needs. CLC is probably better suited for that, or regular air distillation to get pure oxygen.