Energy

Solar Retaining Wall Goes Live in Switzerland

- Adam Clare

solar retaining wall alongside a road

It might seem odd to put solar panels on the side of walls in a region with mountains, but that’s exactly what’s happening in Switzerland. One of the cantons in the country is looking to be powered by at least 40% renewables by 2035 (which is quite achievable); with terrain being scarce it’s hard to place large solar installations. However, retaining walls in some areas get a lot of sunlight depending on their orientations (south facing would generate more for example) and with geography like Switzerland’s there are a lot of retaining walls. The cantons of Appenzell Ausserhoden’s first installation generations 325kW which is the equivalent of 52 Swiss households.

The PV system was anchored on and in the masonry using an adhesive technique. An anchoring depth of a maximum of 90 mm could not be exceeded so that the retaining wall would not be adversely affected.

Due to the close proximity to the asphalt, the solar panels’ components are subject to exceptional corrosion requirements and are anodized for protection. Indirect components are made of aluminum – only the screw anchors are made of stainless steel.

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Let’s Mine Landfills for Profit

- Adam Clare

Extracting resources from under the ground is an expensive and environmentally harmful thing to do. It’s also political challenging in many places to open (or expand) new mining operations, the recent court ruling in Panama demonstrates this. For decades we’ve been tossing perfectly good metals into landfills, so why not mine landfills? In some parts of the world it is economically feasible to so, but in the USA subsidized fossil fuels make the business case to mine landfills more difficult. Still, it’s only a matter of time until landfill mining becomes profitable in North America.

This story showcases one of the issues facing landfill mining in the United States. In Europe, where they view landfills more negatively, they’ve been mining old landfill sites for decades. So why isn’t it more popular here? In simple terms, we have a separate set of motivations. Energy costs are still comparatively low because of the availability of fossil fuels and natural gas, so we don’t value the energy potential of waste buried in landfills. There is not a strong appetite for energy from waste in many locations that could benefit from the energy value of buried plastics and undegraded organic material. Landfill mining is expensive relative to the cost of developing a new landfill site or just transporting waste to a regional disposal facility in someone else’s backyard. The costs for excavation, physical screening, and managing odors and liquids can be significant barriers.
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The popularity of landfill mining may increase over time, with some shifts in the factors above. In the meantime, we’ll continue to monitor Europe and Asia as they explore cost-effective methods. My 25 years of experience in landfills as a solid waste consulting engineer indicates that landfill mining is an intriguing proposition. But will it become a sizable portion of my practice in the next 15 years? Let’s just say I am not pinching my nose or holding my breath.

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We Will Triple Renewable Power Global by 2030

- Adam Clare

Solar Panel School

With renewables already cheaper than fossil fuels it’s not surprising that uptake in renewable energy is increasing. The benefits of renewable aren’t just a clean source of energy but also a cheap source of energy. Some countries around the world are on track to more than triple their renewable energy production and every nation can at least triple theirs with current technology. There’s no reason to build fossil fuel power generators anymore.

National targets do not account for the recent acceleration of renewables

Many government targets do not reflect the recent acceleration in renewables deployment worldwide. For example, 12 countries are set to add capacity in 2023 faster than the pace required to meet their 2030 target. In 22 countries the prospective project development pipelines for wind and solar exceed the renewable capacity needed to meet their 2030 targets. The world could achieve its current targets–a doubling of renewables–just by continuing the 500 gigawatts of estimated deployment in 2023 from 2024 to 2030, but all signs point to a more rapid growth curve.

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Iraq Looking to the Sun to Power its Future

- Adam Clare

Solar panels on grass

Iraqi oil fields have a lot of fossil fuels ready to be exported, and that’s a problem. The Iraqi population, like many oil states, don’t benefit from the cheap oil that corporations extract and export. As a result Iraqis have now turned to solar power for their local energy needs. The current installation of solar panels is relatively small, but they are gaining in popularity and being a nation that gets a lot of sun we can only hope that more people see the light. Let’s keep oil in the ground and put up solar panels.

In nearby Sulaymaniyah, the second-largest city in northern Iraq’s autonomous Kurdish region, only 500 out of the 600,000 households are equipped with solar panels, said Sirwan Mahmud, a spokesman for the province’s electricity department.

Solar power had seen “rapid progression”, he said, after the region’s parliament adopted incentives in 2021 to compensate households for any excess electricity that they generate.

The region aims to build three commercial solar power plants with a total capacity of 75 megawatts (MW), he added.

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In Cold Weather, Heat Pumps Outperform Fossil Fuel Furnaces

- Adam Clare

AI generated image of energy efficient home

If you don’t already have a heat pump then you’re going to want one ASAP. These machines that act as heaters in the winter and air conditioning in the summer are already more efficient than traditional AC units. Now, the current version of heat pumps even outperform fossil fuel furnaces in the cold of winter. At their core heat pumps transfer heat from one space to the next which means they can be anywhere from 200-500% efficient compared to the paltry 98& efficiency of a planet-killing fossil fuel burning fossil. If you own a home then you really should get a heat pump because we need to stop burning fossil fuels as soon as possible.

Efficiency measurements don’t measure comfort, explained Gibb, but he said there are consumer surveys showing those who use heat pumps fare well in cold temperatures. A 2022 consumer analysis in Europe found 81 per cent of respondents said their comfort improved after installing a heat pump. Another study conducted in New York and Massachusetts, which installed monitoring equipment in heat pump users’ homes, found 32 of the 42 people who participated said they were more comfortable post-heat pump.

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