Scope of GB/T 21087 GB/T 21087 is China’s national standard for air-to-air energy recovery devices. It covers the common recovery types used in Chinese and exported equipment: plate (recuperative), rotary wheel (regenerative), heat-pipe, and run-around coil systems. What It Specifies The standard defines classification, technical requirements, test methods, inspection rules, and marking or labeling. It […]
Why BESS & PV Inverters Use Counter-Flow Cores
The Cooling Problem in Energy Storage and PV Inverters Battery energy storage system (BESS) cabinets and photovoltaic (PV) inverters concentrate high-power electronics – IGBT modules, DC/DC converters, reactors and capacitors – into sealed outdoor enclosures. These components dissipate heat at high flux density; if the internal air is not kept cool, semiconductor junction temperatures rise, […]
Heat-Pump Low-Temp Drying: Air-to-Air Recovery
Why Low-Temperature Heat-Pump Drying Conventional grain, fruit and herb drying often uses direct fossil-fired hot air above 80-120 C. That high temperature damages colour, aroma and nutrients and wastes energy. Heat-pump drying supplies warm air at 30-60 C, which protects product quality while still removing moisture. The catch is that the exhaust leaving the drying […]
China Heat-Exchanger Manufacturing Clusters
China: The World’s Largest Heat Exchanger Producer China is the single largest producer of heat exchangers in the world, spanning plate, shell-and-tube, finned-tube, heat-pipe and air-to-air recovery units. Decades of industrial build-out, a deep supplier network and strong export competitiveness have concentrated production in a handful of regional clusters. Liaoning Changtu – the ‘China Heat […]
China Fresh Air (ERV/HRV) Ventilation Industry: Hubs and Market Status
Market Scale and Headroom China’s fresh-air (ventilation with energy recovery, ERV/HRV) market reached roughly RMB 40-60 billion in 2024, depending on whether installation and accessories are included. Penetration sits around 12%, far below the 40%+ seen in Europe and North America – leaving substantial long-term headroom as health-awareness and building codes tighten. Manufacturing Hubs Guangdong […]
Sourcing Recovery Equipment from China
Why Buyers Look to China China’s heat-exchanger clusters offer a mature supplier ecosystem, short lead times and strong price-performance. For air-to-air recovery cores – plate, enthalpy wheel, heat pipe and run-around coil – Chinese makers supply both branded lines and private-label OEM/ODM volumes to global HVAC brands. Certifications to Expect CE marking for the European […]
Heat Recovery in Data Centers: Cooling with Air-to-Air Exchangers
Data centers consume enormous amounts of electricity for cooling. Much of that energy leaves the facility as low-grade waste heat. By using air-to-air heat exchangers, facilities can pre-cool incoming ventilation air with exhaust air, reducing the load on mechanical cooling and improving Power Usage Effectiveness (PUE). Why Data Center Heat Recovery Makes Sense Server racks […]
Generator and Engine Exhaust Heat Recovery with Air-to-Air Cores
Standby diesel and gas generators, and indeed any continuous industrial engine, convert only part of their fuel into electricity or shaft work; a large share leaves as hot exhaust, often 400 to 600 degrees C, and as jacket and coolant heat. For a generator set running even a few thousand hours a year, that exhaust […]
Integrating Air-to-Air Heat Recovery into Air Handling Units (AHU)
An air handling unit is where air-to-air heat recovery earns its keep in commercial buildings: the AHU already moves the supply and return air, so dropping a recovery core into the airstream is the lowest-cost way to reclaim energy at scale. But integration is not simply placing a wheel into the casing, where the core […]
Cross-Flow vs Counter-Flow Heat Exchangers
When specifying a plate air-to-air heat exchanger, the flow arrangement — how the supply and exhaust airstreams meet inside the core — is the single biggest determinant of peak effectiveness and of how the core packages into your unit. Cross-flow (streams perpendicular) and counter-flow (streams opposite) are the two common arrangements, with parallel-flow rarely used […]