With global temperatures breaking records year after year, air conditioning usage is soaring, accounting for a significant share of electricity consumption and emissions. Emerging solid-state cooling technologies may offer a cleaner alternative, but their practical efficiency remains under scrutiny.
- Air conditioning consumes 7% of global electricity and causes 3% of greenhouse emissions
- Solid-state cooling aims to replace conventional AC with less environmental impact
- Efficiency barriers remain a major hurdle for widespread adoption of solid-state AC
What happened
Following three consecutive years of record-breaking heat and ongoing high temperatures, demand for air conditioning has never been greater. Traditional AC systems contribute substantially to energy consumption and carbon emissions globally, exacerbating climate change. This has spurred scientists and startups to explore alternatives that could cool spaces more sustainably.
One promising avenue is solid-state cooling technology, which relies on conductive materials to transfer heat without conventional refrigerants and compressors. These systems could potentially deliver cooling with fewer leaks, lower emissions, and reduced environmental side effects. However, their real-world energy efficiency must match or exceed that of legacy air conditioners for them to gain traction.
Why it matters
Air conditioning currently accounts for about 7% of global electricity usage and contributes approximately 3% to greenhouse gas emissions, underscoring its significant climate impact. As heatwaves intensify due to global warming, air conditioning demand will keep climbing, creating a feedback loop that increases emissions further unless cleaner technologies emerge.
Solid-state cooling could be a breakthrough in breaking this cycle if its technological challenges are overcome. By eliminating or reducing reliance on harmful refrigerants and bulky moving parts, these systems could make cooling more environmentally friendly and energy efficient. Success here would have positive implications for public health, energy policy, and climate goals.
What to watch next
The coming years will be critical in assessing whether solid-state air conditioning can achieve commercial viability at scale. Key indicators will include improvements in energy efficiency, cost competitiveness with traditional AC units, and proven reductions in greenhouse gas emissions during manufacturing and operation.
Other developments to monitor include regulatory support for low-emission cooling technologies and continued investment from startups and established companies in solid-state innovations. Additionally, progress in related technologies like AI-driven design may accelerate breakthroughs in materials science essential for these systems.