Local Energy

This Cambridge Engineer Says We're Solving the Easy Problem Last | James Macnaghten, Caldera CEO

37 min · 24. apr. 2026
episode This Cambridge Engineer Says We're Solving the Easy Problem Last | James Macnaghten, Caldera CEO cover

Description

Industrial heat causes 20% of global greenhouse gas emissions — and almost nobody's working on the easy part. James Macnaghten is a Cambridge-trained engineer with 20+ patents who shut down his first energy storage company after realizing it's often cheaper to throw renewable energy away than store it. Now as CEO of Caldera, he's converting cheap electricity into industrial steam using recycled aluminum and volcanic rock — and deploying units into hospitals and factories without requiring grid upgrades. James breaks down why the energy world keeps chasing steelmaking and cement while ignoring brewing, food, and pharma. He makes the case for hybridization over going 100% clean, shares why he thinks oil demand is headed for a crash, and questions whether the AI energy boom can survive its own economics. Caldera's first appearance on the show — and our first guest from across the Atlantic. Timestamps: 0:00 Intro 0:57 Meet James Macnaghten 2:52 Have humans landed on the moon? 3:22 Tourists or engineers — which gives more grief? 3:35 20+ patents and what James learned about filing 5:09 From Cambridge to Isentropic to Caldera 7:48 The epiphany: cheaper to throw energy away 9:31 Never use air as a heat transfer medium 15:53 Industrial heat — the overlooked 20% 16:17 Why we're solving the wrong problem first 18:51 Hybridization over 100% clean 20:02 The 1,000-hour rule for surplus renewables 21:04 Caldera alongside factory gas boilers 23:02 Diesel prices and R&D cycles 27:58 GEA's investment in Caldera 29:34 Heat pumps and managing peak demand 31:36 First deployments going into a hospital 33:31 Oil demand crash prediction 35:23 Will the AI energy bubble burst? 37:15 Where to find James Guest links: James Macnaghten — https://www.linkedin.com/in/james-macnaghten-7aaa65a/ Caldera — https://www.caldera.co.uk/ Connect with us: Website — https://localenergy.com Peter Brecht — https://www.linkedin.com/in/peterbrecht/ Wade Spear — https://www.linkedin.com/in/wadespear/ Guest inquiries — peter@localenergy.com

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24 episodes

episode How Rugby Built an Oil & Gas Career: Leadership, Risk-Taking and Community in the Energy Patch artwork

How Rugby Built an Oil & Gas Career: Leadership, Risk-Taking and Community in the Energy Patch

Why does Australia raise more revenue on beer taxes than its massive gas exports? What You'll Learn: * The Australian Energy Tax Paradox: Why independent Senator David Pocock is calling out the government for making more revenue on beer taxes than offshore gas exports. * US vs. Australian Royalties: How onshore mineral rights and oil and gas royalty calculations differ between the United States and Australia. * The Legend of Bass Strait: How a single geologist in the 1960s discovered a legacy oil field that fueled a nation for over fifty years. * Corporate to Craft Brewery Pivot: The step-by-step feasibility process Sean Hanrahan used to launch Platypus Brewing and transition to his new 2.5-acre community hub, The Oasis. * The Global Rugby Brotherhood: Why the values of sacrifice, camaraderie, and dedicated club facilities make rugby the ultimate networking fraternity. Episode Summary: In this episode of the Local Energy Podcast, host Peter Brecht and retired pro rugby athlete Maceo Brown sit down with Sean Hanrahan, a former Australian minerals and oil & gas executive who successfully pivoted to become a prominent Houston entrepreneur. The conversation explores the deep, unexpected connections between global energy markets, professional sports, and community building. We dive into the current political and economic landscape of Australian oil and gas. Sean explains how Australia, despite being a prolific net exporter of LNG to Asian markets, is facing a massive populist shift led by independent Senator David Pocock — who revealed that the Australian government collects more tax revenue from beer than from its multi-billion-dollar gas exports. Sean contrasts this with the Norwegian tax model and explains how royalty structures differ between the competitive US onshore market and Australia's conglomerate-dominated offshore plays. Finally, Sean shares an exclusive look at his next venture: closing Platypus Brewing's physical restaurant to launch The Oasis by Platypus, an expansive 2.5-acre community-centric hub in Houston designed to unite families, young professionals, and the city's passionate amateur rugby community. Chapters: * 00:00 - Introduction and Moon Landing Debates * 02:45 - Why Australian Energy Executives Gravitate to Houston * 05:37 - Sponsoring the Houston SaberCats & Pro Rugby Sacrifices * 12:13 - Sean's Global Oil & Gas Exploration Career * 13:55 - Overview of Australian Oil & Gas Resources * 18:21 - The Beer Tax vs. Gas Export Revenue Controversy * 22:55 - US vs. Australian Onshore Royalty Structures * 26:56 - David Pocock and the Rugby-to-Politics Pipeline * 30:42 - Transitioning Platypus Brewing to The Oasis Hub * 40:53 - Hardwired Lessons on Building Community Spaces Guest:Sean Hanrahan is a former global minerals and petroleum executive who managed international exploration portfolios for one of Australia's largest natural resource conglomerates. In 2015, he transitioned into hospitality, founding Platypus Brewing in Houston, Texas, and serving as the beer sponsor for the MLR's Houston SaberCats. He is currently developing The Oasis by Platypus, a 2.5-acre, community-centric craft-beer and sports hub. Connect with Sean on LinkedIn [https://www.linkedin.com/in/hanrahansean/] and visit Platypus Brewing & The Oasis [https://www.platypusbrewing.com/].

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episode Inside the Cushing Hub Moving 100 Million Barrels with Corey Brown artwork

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Corey Brown takes listeners inside the Cushing Tank Farms in Oklahoma, one of the most important crude oil storage and transfer hubs in the U.S. He explains how the site supports WTI benchmark pricing, how crude is measured and transferred through custody transfer systems, and why commodity traders monitor tank levels, rail activity, and pump heat signatures to track supply in real time. The conversation breaks down the hands-on work of an electrician in a high-pressure oil-and-gas environment. Corey walks through pipeline infrastructure, valves, satellite communications, pigging operations, external floating-roof tanks, and the rigorous inspection and cleaning cycles required by DOT regulations. Throughout the episode, he emphasizes that safety is the foundation of the work — documentation, PPE, H2S monitors, permits, and disciplined procedures are part of the job every single day. Corey also shares what the culture is like at Cushing, how multiple companies operate side by side, and how workers can start with a high school diploma and grow into skilled technical roles through company-sponsored training programs. In this episode, you'll learn: * How the Cushing Oil Tank Farms connect to WTI pricing and why traders watch them closely * What an electrician does in a tank farm environment, including pressure transmitters, metering devices, and custody transfer systems * How pigging, floating roof tanks, and tank cleaning keep crude moving safely and efficiently * Why safety culture, permits, PPE, and H2S monitoring are non-negotiable in oil and gas operations * What it takes to build a long-term blue-collar career in oil and gas with training and advancement on-site Timestamps:00:00 - Introduction03:37 - Family and industry roots04:26 - Tank farm scale and size05:51 - How traders monitor supply07:24 - Electrician responsibilities09:36 - Custody transfer basics12:01 - Safety culture and PPE14:36 - Pigging the pipeline16:24 - Floating roof tanks explained18:34 - Tank cleaning cycle21:15 - Workplace culture at Cushing24:03 - Career pathways in oil and gas25:35 - The day WTI went negative27:55 - Why the system works About Corey Brown:Corey Brown is an electrician at Cushing Tank Farms in Oklahoma, where he supports critical electrical and control systems for crude oil storage and pipeline operations. He brings more than 20 years of experience in the tank farm environment and offers firsthand insight into the safety, regulation, and day-to-day realities of keeping oil moving.

2. juni 202629 min
episode Unleashing California: How Mike Umbro Is Turning Depleted Oil Fields Into the Grid's Biggest Battery artwork

Unleashing California: How Mike Umbro Is Turning Depleted Oil Fields Into the Grid's Biggest Battery

California is importing 70% of its oil while shutting down its own refineries. Mike Umbro has been watching it happen from the inside. In this episode, Peter Brecht and Wade Spear sit down with Mike Umbro, founder and CEO of Californians for Energy and Science, to talk about what's really happening on the ground in California's oil patch. They cover the near-standstill in Kern County drilling, the closure of Valero Benicia, the Sable offshore opportunity in federal waters, and Mike's pioneering GEOTES technology that turns depleted oil reservoirs into long-duration thermal batteries. If you work in California oil and gas, energy markets, field operations, or you just like real shop talk from people who care about the industry, this episode is for you. Topics discussed: * Activity in Kern County and the economic impact of oil and gas * CEQA and California's regulatory environment * The Sable offshore opportunity in federal waters * Refinery closures and what they mean for fuel supply * GEOTES: turning depleted oil reservoirs into thermal batteries * Educating the next generation of energy workers Show Notes: GeoTES Overview: https://www.youtube.com/watch?v=zN6imPjOZe8&t=3s [https://www.youtube.com/watch?v=zN6imPjOZe8&t=3s] Californians for Energy & Science: https://www.energyandscience.com/ [https://www.energyandscience.com/] Mike Umbro X: https://x.com/MikeUmbro [https://x.com/MikeUmbro] Mike Umbro LinkedIn: https://www.linkedin.com/in/mikeumbro/ [https://www.linkedin.com/in/mikeumbro/] Website: https://localenergy.com [https://localenergy.com] YouTube: https://www.youtube.com/@localenergyio [https://www.youtube.com/@localenergyio] Local Energy is an oil and gas podcast hosted by Peter Brecht and Wade Spear, covering drilling, production, field operations, energy markets, oilfield careers, insurance, LNG, power, and the people who actually do the work.

22. maj 202643 min
episode Offshore Distributed Control System (DCS) with Joey Johnston | Industrial Design Solutions artwork

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Offshore platforms only look like steel and hardware from the outside. Underneath, they run on logic, alarms, timing, and people who understand exactly how the process is supposed to behave. In this episode, Peter Brecht and Wade Spear sit down with Joey Johnston to talk about life offshore, Distributed Control Systems (DCS), safety instrumented systems, startup and commissioning work, and the role control engineers play in keeping platforms running. They talk about why he made the jump from Emerson to offshore work, how DCS logic connects to real equipment, where AI may fit into analytics and monitoring, what people get wrong about offshore safety and environmental discipline, and how Joey is using AI to organize his wine collection. If you work in controls, automation, instrumentation, operations, offshore production, or you just like real shop talk from people who care about the industry, this episode is for you. Topics discussed: * Offshore DCS and control systems * Industrial Design Solutions and mission-critical support * Platform culture and crew routines * Startup, commissioning, and troubleshooting * AI in process control and cybersecurity * Offshore safety and environmental discipline Connect with Joey: https://www.linkedin.com/in/josephjohnston1/ [https://www.linkedin.com/in/josephjohnston1/] Industrial Design Solutions: https://idspower.com/ [https://idspower.com/] Connect with Peter: https://www.linkedin.com/in/peterbrecht [https://www.linkedin.com/in/peterbrecht] Connect with Wade: https://www.linkedin.com/in/wade-spear-05995b54 [https://www.linkedin.com/in/wade-spear-05995b54] Website: https://localenergy.com [https://localenergy.com] YouTube: https://www.youtube.com/@localenergyio [https://www.youtube.com/@localenergyio] Local Energy is an oil and gas podcast hosted by Peter Brecht and Wade Spear, covering drilling, production, field operations, energy markets, oilfield careers, insurance, LNG, power, and the people who actually do the work.

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episode Wireline, Workovers, and Oilfield X with Tejano Brown artwork

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