Heating Homes With Tap Water
Can tap water be used to heat homes? It’s not as crazy as it first seems - the energy released when water is frozen can be extracted by a heat pump and used to keep homes warm. This could be a very efficient source of heat for apartments and houses in the city.
The UK faces a huge challenge. 22 million houses are heated with gas - accounting for 77% of heating CO2 emissions.
The Surprising Benefit of Dehumidifying
Winter and Covid combined mean we’re spending a lot of time at home. That means generating moisture. Moisture brings higher humidity, condensation and eventually mold.
To understand the most energy efficient way of fixing this, I calculated the energy required for venting and dehumidifying. This revealed something surprising - running a dehumidifier can actually save money. The heat released by condensing the water in the air means it produces more heat than the electricity it uses.
Carbon Tax and Dividend
A carbon tax is the best way to stimulate green technology. Unfortunately it’s unlikely to be popular as it is necessarily regressive - it will impact the poorest hardest. In the current political climate no politician will touch it. To win votes, energy prices need to go down, not up.
But what if, instead of just collecting that tax, we redistribute it evenly. If the increased price of fuel is offset by a monthly dividend to every household, suddenly our regressive elitist tax becomes a popularist one.
Biochar carbon capture
Biochar is created by the pyrolysis of wood and other biological material. Heating the biological material to very high temperatures in the absence of oxygen causes the substances within them to break down into gases, leaving just carbon.
This is how charcoal is created from wood.
It’s interesting from a climate change point of view as it converts wood - a natural accumulation of atmospheric carbon - into a solid, stable form of carbon which can be buried or stored.
I’m British, and like many British people I live in an old house. In my case, a brick one built in 1949.
It may be 71 years old, but for a British house that’s fairly young. In fact, 80% of our housing stock was built more than 60 years ago. Old houses are cold, draughty and poorly insulated. For every house built to modern standards there’s hundreds more that aren’t. This isn’t just a British problem.
For green technology, look to the market
The only feasible solution to climate change is technology. We just won’t change our lifestyles based on the abstract threat of climate change. But the technology isn’t there yet. We don’t have all the pieces we need to live the green version of our current lifestyle.
Our lives are driven by energy. It makes our cars move and our planes fly, it creates our fertiliser and harvests our crops. It keeps us warm in winter and cool in summer.