So lets show what wastes we are talking about:
 |
| This is where London sends at least 50% of their DOMESTIC wastes |
Sun Earth Energy
Geothermal
- Details
- Written by British Geological Society
- Category: Geothermal
- Hits: 119
The term ‘geothermal energy’ refers to any heat derived from the ground, from depths of a few metres to multiple kilometres beneath the Earth’s surface.
Low-grade heat stored in the shallow subsurface (<200 m) is largely derived from solar radiation that is absorbed by the ground and distributed via natural groundwater systems and artificial structures such as flooded coal mines. The ground acts as a solar battery and, for this heat, utilisation usually requires a heat pump. This energy is widely described as ‘ground-source energy’ or ‘shallow geothermal energy’.
There is no strict definition for ‘deep geothermal energy’, but the UK Government has adopted the term to refer to heat resources derived from depths of >500 m. The heat of the Earth increases with depth, a phenomenon described as the geothermal gradient. This heat is partly the primordial heat from when the Earth was formed and partly heat generated from within the Earth’s crust from the decay of mildly radioactive elements. This upward heat flux varies across the globe, but in the UK is around 27°C/km (Busby, 2014). Assuming an average annual air temperature of 12°C, this means that subsurface temperatures at 1000 m, 3000 m and 5000 m are around 39°C, 89°C and 139°C, respectively.
Combined Heat, Power and Cooling
- Details
- Written by Lindsey Zaranynika
- Category: Energy Efficiency
- Hits: 2649
Combined Heat and Power Systems
Using energy efficiently has become a goal across industries in the past decade. Rising energy prices, an increasingly competitive marketplace, and environmental regulation of harmful pollutant emissions have all incited commercial and industrial energy users to search out the most efficient and cleanest ways to use energy.
Energy from Wastes
- Details
- Written by Roman Health
- Category: Energy
- Hits: 3016
In my last blog I called for more effort on energy from wastes. I showed some nice pictures of Anaerobic Digester Plant in the Czech Republic. Who listens? Not many, I was not bold enough in my delivery..
So lets show what wastes we are talking about:
London is a great example. It generated hundreds and thousands of tons per year of domestic waste plus a further 16 million tons of commercial wastes (including construction materials). No, that is a lot of stuff.
So lets show what wastes we are talking about:
Energy Efficiency
- Details
- Written by Super User
- Category: Energy Efficiency
- Hits: 7206
Great article extolling the virtues [and effectiveness] of Energy Efficiency projects;
CLICK HERE to see my Blog on this subject