洗衣房热回收：再利用洗涤与烘干排气

Laundries are heat hogs

C商业洗衣房加热大量水，并整天排出干燥机温热潮湿的废气。其高达70%的能量会以温水和湿空气的形式流失。热回收是该行业回报最快的方式。

Two streams to catch

• 洗涤水 – drain water at 40-60C feeds a 水-水换热器 或采用热泵对进入的冷水进行预热。见 废水源回收.
• 干燥机排气 – warm, humid air gives up heat to make-up air via an 焓转轮 或板翅式装置。

Hygiene and fouling

绒毛和洗涤剂要求使用可清洁、易检修的芯体。请根据我们的以下计划安排维护周期： 清洁指南 并在任何水换热器的上游使用毛发／截留过滤器。

投资回收

热水需求高意味着回热通常1.5–3年即可回收投资，并削减热水加热能耗30–50%。通过以下进行验证： 投资回收期计算。设有自有洗衣房的休闲场所（见 体育设施）受益最大。

Water side: the bigger prize

Wash water leaving at 40 to 60C carries the largest share of a laundry energy, so the water-to-water exchanger or heat pump on the drain is usually the fastest payback. A plate or coil unit pre-warms incoming cold water, directly cutting the boiler or electric load needed to reach wash temperature. Where the drain is continuous, a heat pump can lift that warmth to an even higher supply temperature.

Air side: dryer exhaust

Dryer exhaust is hot and humid, ideal for an enthalpic wheel or plate unit that returns both temperature and moisture to the make-up air, reducing the heating needed to replace it. Because dryers run in batches, the recovery should handle part-load gracefully, since a coil or wheel sized only to peak batch flow wastes effectiveness between cycles.

Keeping it clean and measurable

Lint and detergent make the air and water sides fouling-prone, so accessible, cleanable cores and an upstream strainer protect performance and hygiene. Trend the temperature recovery on both sides and the water-heating energy saved, so a falling trend flags a fouled coil before it hits the utility bill. The 30 to 50 percent water-heating saving depends on keeping both streams clean.

常见问题

What are the two laundry heat streams?
Wash water at 40 to 60C handled by a water-to-water exchanger or heat pump, and hot humid dryer exhaust handled by an enthalpic wheel or plate unit.

Which gives the fastest payback?
The wash-water side usually, because it is the largest energy share. A heat pump can lift it to an even higher supply temperature.

What hygiene issues matter?
Lint and detergent demand cleanable, accessible cores and an upstream strainer. Plan a cleaning rhythm.

What payback is typical?
Often 1.5 to 3 years, cutting water-heating energy by 30 to 50 percent. Validate with a payback calculation.

常见问题

What are the two laundry heat streams?

Wash water at 40 to 60C handled by a water-to-water exchanger or heat pump, and hot humid dryer exhaust handled by an enthalpic wheel or plate unit.

Which gives the fastest payback?

The wash-water side usually, because it is the largest energy share. A heat pump can lift it to an even higher supply temperature.

What hygiene issues matter?

Lint and detergent demand cleanable, accessible cores and an upstream strainer. Plan a cleaning rhythm.

What payback is typical?

Often 1.5 to 3 years, cutting water-heating energy by 30 to 50 percent. Validate with a payback calculation.