Heat Pipe & Run-Around Coil: Separate Air Streams

The Separation Problem

S某些现场（洁净室、医院、危险或腐蚀性环境）绝不可混合送风与排风。旋转轮与板式换热器通过共享表面移热，因此工程师转向能将气流完全隔离的技术。

Heat Pipes

热管是充有工作流体的密封管。热量在热端使流体蒸发、在冷端冷凝，无需运动部件、无交叉污染地转移能量。热管阵列置于跨越两股气流的单台装置中，因而紧凑且免维护。

Run-Around Coils

耦合盘管（run-around）系统使用由泵送流体环路连接的两个盘管。一个盘管在排风侧，另一个在送风侧；流体将热量从一侧带到另一侧。由于唯一连接是外部管道环路，两股气流完全隔离，盘管可相距较远。

Which to Choose

• 热管：最适合紧凑空间内的中温回收，无泵、非常可靠。
• 耦合盘管：最适合气流相距较远、涉及空气以外的液体或气体、或要求极高隔离度的场景。

Practical Notes

• 热管几乎被动工作；按运行温度区间选型。
• 耦合环路在寒冷现场需要水泵与防冻保护。
• 两者都规避了旋转轮的泄漏与污染风险，这正是隔离流回收在矿山、数据中心和制药厂常见的原因。

Outlook

随着空气质量与污染法规趋严，隔离流回收将持续增长。热管与耦合盘管让工程师能在不损害隔离的前提下干净地回收能量。

常见问题

When must the two airstreams stay completely separate?
In cleanrooms, hospitals, hazardous or corrosive environments, and anywhere cross-contamination is unacceptable, energy must move while the air never mixes.

How does a heat pipe work?
A sealed tube holds a working fluid that evaporates at the warm end and condenses at the cool end, carrying energy with no moving parts and no cross-contamination between streams.

What is a run-around coil system?
Two coils in the separate airstreams are linked by a pumped fluid loop, so heat transfers through the liquid without the airstreams ever meeting.

Which should I choose?
Heat pipes are compact and maintenance-free for moderate distances; run-around coils suit streams that are far apart or where a single device cannot span both.

常见问题

When must the two airstreams stay completely separate?

In cleanrooms, hospitals, hazardous or corrosive environments, and anywhere cross-contamination is unacceptable, energy must move while the air never mixes.

How does a heat pipe work?

A sealed tube holds a working fluid that evaporates at the warm end and condenses at the cool end, carrying energy with no moving parts and no cross-contamination between streams.

What is a run-around coil system?

Two coils in the separate airstreams are linked by a pumped fluid loop, so heat transfers through the liquid without the airstreams ever meeting.

Which should I choose?

Heat pipes are compact and maintenance-free for moderate distances; run-around coils suit streams that are far apart or where a single device cannot span both.