Oulu Energy Arena ice rink chose #ABB# #HVAC# drives to control their compressors, ensuring reliable and energy-efficient ice making. The ultra-low harmonic ACH580 #drives# don't generate #harmonics# and help keep the electric network clean. Learn more.⬇️ https://t.co/GV3YBPQhnW

As India advances toward net-zero goals, the HVACR industry is evolving to meet growing demands for energy-efficient and sustainable climate control. In an exclusive conversation with C&A Magazine, AR Madhusudan, Local Division Manager – Drive Products, ABB India, shares how ABB’s variable speed drives and automation solutions are redefining HVACR performance across data centers, hospitals, airports, metros, and tunnels, helping to progress key nation-building projects. Read the full story in C&A Magazine: https://t.co/3bOhahabn3 #ABBIndia# #ABBDrives# #EnergyEfficiency#

The physics of heat transfer are way cooler than you think. If we designed homes with them in mind, they'd be a lot more resilient and energy efficient, and people would be a lot more comfortable. Insulation standards and HVAC systems are designed around maintaining the air temperature inside a building, but air temperature is only a tiny slice of the picture. In typical conditions, only ~15% of the human body's heat loss is from convection. ~60% is from radiation, and ~20% is from evaporation (breathing and sweating). Your body glows like a light bulb with infrared radiation. You are constantly emitting infrared radiation into the environment and absorbing infrared radiation from the environment. Radiative power scales with the 4th power of temperature, so even small changes in temperature result in large changes in heat flux. If your skin temp is 34°C (93.2°F), you emit 505 W/m^2. A wall at 10°C (50°F) emits 364 W/m^2 while a wall at 40°C (104°F) emits 545 W/m^2. Your body is ~100 W and ~2 m^2. You need a net cooling of ~50 W/m^2 to maintain your body temperature. If you weren't constantly bathed in infrared radiation, you'd quickly lose heat to the environment. If you're surrounded by hot surfaces, you can be baked by infrared even if the air temperature is low. The temperature of the walls, ceiling, and floor is more important than temperature of the air. Underinsulated surfaces can be cold even when the air is warm, and hot even when the air is cold. This (and humidity) is why your house at 70°F doesn't feel the same in the winter and the summer. Doubling the amount of insulation in a home cuts the energy required to maintain a given air temperature in half, but it also cuts the differential between the temperature of the walls and the air. With better insulation, not only do you not need as much energy to maintain the same air temperature, you don't even have to maintain the same air temperature. Air conditioning can reduce humidity, but most air conditioners can't intentionally control humidity, and most HVAC system have no way to increase humidity. Better control over humidity reduces the temperature differential your house has to maintain with the outside to provide the same heat transfer for the people inside. Having air that's not overly dry in the winter means it doesn't have to be as warm to be comfortable. Having air that's not overly humid in the summer means it doesn't have to be as cold. The goal is to maintain human body temperature, not air temperature. Radiation and evaporation make up most of the heat transfer. Looking only at air temperature completely misses the big picture. We underinsulate our homes and don't provide adequate control over the aspects that are most important for comfort. Insulation provides a much larger efficiency benefit than you'd expect from a simple Manual J calculation. That's compounded by the fact that the economic value of that energy savings is far larger than flat volumetric pricing indicates. (because insulation provides the most benefit in extreme conditions where capacity is constrained and prices are high) Heat and cooling are the majority of energy use in homes, and the vast majority of energy costs. Real consideration of the physics of heat transfer and the economics of energy systems in the way we design homes and HVAC systems would provide massive economic benefits.

Mike Rowe: “We’ve been telling kids for 15 years to learn to code.” “Well, AI is coming for the coders.” “It’s not coming for the welders, the plumbers, the steamfitters, the pipefitters, the HVAC, or the electricians.” “In Aspen, I sat and listened to Larry Fink say we need 500,000 electricians in the next couple of years—not hyperbole.” “The BlueForge Alliance, who oversees our maritime industrial base—that’s 15,000 individual companies who are collectively charged with building and delivering nuclear-powered subs to the Navy … calls and says, we’re having a hell of a time finding tradespeople. Can you help?” “I said, I don’t know, man … how many do you need? He says, 140,000.” “These are our submarines. Things go hypersonic, a little sideways with China, Taiwan, our aircraft carriers are no longer the point of the spear. They’re vulnerable.” “Our submarines matter, and these guys have a pinch point because they can’t find welders and electricians to get them built.” “The automotive industry needs 80,000 collision repair and technicians.” “Energy, I don’t even know what the number is, I hear 300,000, I hear 500,000.” “There is a clear and present freakout going on right now. I’ve heard from six governors in the last six months. I’ve heard from the heads of major companies.” @mikeroweworks

白宫发布六个月来的首份 AI 政绩和战略行动指南 AMERICA’S AI ACTION PLAN 🎯 核心叙事："赢得 AI 竞赛" 实现并维持无可挑战的全球 AI 技术主导地位，AI 是国家安全与经济竞赛的主战场！ - 三合一战略视角：新工业革命 + 信息革命 + 文艺复兴 - 竞赛思维：谁掌握最大 AI 生态，谁定标准、谁得红利 - 历史类比：像赢得太空竞赛一样赢得AI竞赛 - 战略高度：无可挑战的全球技术主导权 💡 战略愿景："三重革命" - 工业革命、信息革命和文艺复兴同时发生，这就是 AI 所呈现的潜力。 🏛️支柱一：加速AI创新 - 从"监管者"转为"加速器" - 全面去监管：撤销前任 AI 行政令，审查 FTC 等机构对 AI 企业的限制条款； - 价值观审查：政府采购只选"无意识形态偏见"的模型，删除NIST 框架中的 DEI 等内容； - 开源生态：建立算力金融市场机制（类期货/现货），扩大NAIRR 资源； - 产业采用：设立监管沙盒、AI 卓越中心，在医疗能源等领域建立生产力测度标准； - 人才培养：税收优惠鼓励企业 AI 培训，建立 AI 劳动力研究中心； - 政府应用：统一 AI 采购工具箱，国防部优先自动化工作流； 🏗️ 支柱二：建设AI基础设施 - 简单来说，我们需要"建设，宝贝，建设！" AI 是现代生活中第一个挑战美国建设远超当前规模能源发电能力的数字服务。 - 许可加速：NEPA 快速分类豁免、FAST-41 扩展、统一水法许可； 电网三步走：稳住现有容量 → 优化传输系统 → 接入核能/地热/聚变新电源 芯片回流：CHIPS 项目去除附加条件，强调投资回报与 AI 工具进入制程； 安全护栏：供应链去"对手技术"，建高安全军事数据中心标准； 技能培训：电工、HVAC 技师等高薪岗位培训，扩大注册学徒制； 网络韧性：建立 AI-ISAC 威胁情报共享，完善 AI 事件应急响应； 🌍支柱三：国际AI外交与安全 - 输出美国 AI "全栈"标准，严控技术扩散 - 整包输出：商务部牵头推动"全栈AI出口套餐"，金融外交多部门协同； 标准竞争：在国际组织对抗"繁重监管"，抵制中国监控技术标准； 出口管制：芯片位置验证技术、情报协作封堵转运、控制半导体子系统； 盟友对齐：外交+关税工具防止盟友"补位"，推动采用美国标准； 模型评估：政府主导评估本国与对手AI的国家安全风险，查"后门"； 生物安全：强制科研机构使用有客户验证的核酸合成服务商； 一句话总结：“美国把 AI 当作综合国力竞争的国家总动员令，放松监管、疯狂建底座、输出标准并围堵对手”👀