The European Union regulates ventilation units through Regulation (EU) 1253/2014 (the “Ecodesign” Lot 21 measure). It sets binding minimum thermal efficiency and fan-power limits for units placed on the EU market, so any AHU or ERV sold in Europe must comply. Scope Applies to residential and non-residential ventilation units with a fan electric power of […]
热泵选型计算
A correct heat pump selection calculation prevents both undersizing (poor performance) and oversizing (short cycling and wasted capital). The method below applies to space heating, domestic hot water, and process heat recovery alike. Step 1 — Define the Load Start from the peak heating or cooling load in kW. For recovery duties, size to the […]
ASHRAE 62.1 通风与能量回收
ASHRAE 62.1-2022 sets the minimum ventilation rates for acceptable indoor air quality, and its requirements directly drive how much outdoor air — and therefore how much recoverable energy — a system must handle. Energy recovery is the bridge between good ventilation and reasonable energy bills. The Ventilation Rate Procedure Section 6.2 uses the Ventilation Rate […]
除湿换热回收
Desiccant dehumidification heat recovery combines moisture removal with energy recycling. A desiccant material (solid wheel or liquid solution) absorbs water vapor from process air; the now-concentrated desiccant is regenerated using low-grade heat, and that regeneration stream’s energy is recovered rather than wasted. Why Pair Desiccation with Recovery Conventional cooling-only dehumidification overcools then reheats the air, […]
ASHRAE 90.1 热回收要求
ASHRAE Standard 90.1 is the reference energy standard for commercial buildings in the United States, and its exhaust-air energy recovery rule is the single most common code trigger for specifying a heat recovery ventilator. This article summarizes the ASHRAE 90.1-2022 requirements that apply to designers specifying air-to-air recovery. When Recovery Is Mandatory (Section 6.5.6.1) A […]
膜式能量回收通风
Membrane energy recovery ventilation (MERV) uses a stationary, non-rotating polymer membrane core to transfer both sensible and latent heat between supply and exhaust airstreams. Unlike a rotating energy recovery wheel, a membrane exchanger has no moving parts and physically separates the two airstreams, which eliminates the carryover of moisture, odors, and particulates that can occur […]
热泵废热回收：提升低品位热
The low-grade problem Much recoverable heat is low-grade – 25-60C drain water, vent air, or process streams. Too cool to use directly, but too warm to waste. A heat pump lifts it to a useful temperature using a little electrical work. How it pairs with air-to-air recovery Start with passive air-to-air or air-to-water recovery to […]
冷链物流热回收：从冷库到冷凝器
A cold chain is a heat chain Cold stores, freezers, and refrigerated warehouses move heat out continuously. That rejected heat is a free resource – if you capture it. Cold-chain recovery turns a pure energy cost into a partial energy gain. Where the heat is Condenser reject – the biggest, hottest stream (30-50C). Route it […]
商业建筑热回收：办公楼、酒店、混合用途
The everyday opportunity Offices, hotels, and mixed-use buildings run ventilation around the clock with high fresh-air rates. Recovering that exhaust energy is the single biggest HVAC saving for most commercial stock. Technology mix Offices – balanced AHUs favor plate or rotary recovery; see AHU recovery. Hotels – guest-room ventilation plus laundry and pool loads; pair […]
洗衣房热回收：再利用洗涤与烘干排气
Laundries are heat hogs Commercial laundries heat vast volumes of water and run dryer exhaust hot and moist all day. Up to 70% of their energy can leave as warm water and humid air. Recovery is the fastest payback in the sector. Two streams to catch Wash water – drain water at 40-60C feeds a […]