机场HVAC与能量回收：削减航站楼能耗

Why terminals are energy hotspots

Airports are among the most energy-intensive buildings in the commercial sector. Vast terminals run 24/7 with high fresh-air requirements, large glass facades, and constantly moving passenger loads. Heating and cooling the ventilation air alone can account for 40-60% of a terminal’s HVAC energy. Air-to-air heat recovery is the single highest-return measure to cut that load.

Why recovery matters here

航站楼通过卫生间、休息室和候机厅排出大量空调空气，同时吸入等量室外空气。若无回收，这部分能量便被白白浪费。一种 旋转式热回收轮 或一 板式换热器 在两种气流离开建筑前，于其之间传递显热（若采用焓介质，还包括潜热）能量。

Technology choices

• 转轮 适用于风量极大（数万 m3/h）且看重紧凑占地的情况。
• Plate exchangers 在送风和排风必须严格分离时更受青睐。
• 间接式循环盘管 当送风和排风管道相距较远时采用环流回路。

Cold-climate note

在以供暖为主的机场，排气侧结霜是真实风险。参见我们的指南： 热回收的防霜保护 了解吹扫扇区和预热策略。

投资回收

随着能源成本和碳目标上升，多数机场改造项目在 2–4 年内回收资本。从系统审计开始，然后按设计室外条件而非年平均来选型换热器。

Terminal design favors zoned recovery rather than one large core. Group spaces by schedule and exhaust quality, mechanical rooms and lounges on their own loops, so each exchanger runs near its design point instead of averaging across very different loads. Demand-controlled ventilation, trimming outdoor air to occupancy, raises the recovered-energy fraction because the streams stay balanced. Coordinate recovery with the building management system so free cooling and heat recovery share the load by season. Security and fire compartments also shape duct routing, which is where run-around coils help when supply and exhaust shafts are far apart. Most airport programs pair an energy audit with a phased rollout to limit disruption to live terminals.

常见问题

Which recovery type suits a large terminal?
Rotary wheels suit very large single airflows where footprint matters, while plate exchangers are preferred when supply and exhaust must stay strictly separated.

How is frost handled in cold climates?
Use purge sectors on wheels or pre-heat and defrost bypass on plates, sized to the winter design day rather than the annual average.

What payback can airports expect?
Most terminal retrofits recover capital in roughly two to four years, faster where heating degree days and operating hours are high.

常见问题

Which recovery type suits a large terminal?

Rotary wheels suit very large single airflows where footprint matters, while plate exchangers are preferred when supply and exhaust must stay strictly separated.

How is frost handled in cold climates?

Use purge sectors on wheels or pre-heat and defrost bypass on plates, sized to the winter design day rather than the annual average.

What payback can airports expect?

Most terminal retrofits recover capital in roughly two to four years, faster where heating degree days and operating hours are high.