【精品工程案例】跨越山海，智造清凉——孟加拉国Madaripur大型制衣厂蒸发式冷风机+负压风机+水帘墙组合工程

【项目背景：在“世界工厂”的腹地，为劳动者创造价值】

孟加拉国，这片位于南亚恒河三角洲的土地，拥有典型的热带季风气候，全年高温高湿，漫长的夏季平均气温常徘徊在30℃以上。作为全球第二大服装出口国，制衣业是其国民经济的支柱产业。这里人口密度极高，劳动力资源丰富，被誉为“世界工厂”的后起之秀。

随着“一带一路”倡议的深入推进，中孟经贸合作日益紧密。大量的中国成熟制衣工艺与管理经验被引入当地，极大地提升了生产效率。然而，先进的生产工艺对生产环境提出了严苛要求——高温不仅影响精密缝纫设备的稳定性，更会导致工人体力透支、注意力下降，进而影响成衣良品率。如何为密集的劳动力创造一个健康、舒适的工作环境，成为当地企业转型升级的关键。

正是在这样的背景下，孟加拉国大型制衣企业——乔卡纺织有限公司（Chorka Texlile Ltd），找到了深耕通风降温领域多年的瑞峰环保制冷。

【现场挑战：多样厂房结构，考验综合设计能力】

乔卡纺织位于莫多尔布尔县（Madaripur），其厂区主要由风格迥异的两部分构成，这对通风降温方案的设计提出了巨大挑战：

1、新厂房（四层混凝土结构）：采光良好，但层高不一。一楼层高约7米，空间开阔；二、三、四楼层高仅4米左右，相对低矮。混凝土结构导热慢，但热量易积聚。

2、老厂房（四栋彩钢瓦平房）：呈并列连排结构，单层层高超8米，属于典型的高大空间。彩钢瓦吸热快，在烈日直射下，室内宛如蒸笼，闷热感极强。

【瑞峰方案：因地制宜，组合出击，破解降温难题】

面对跨度如此之大的多建筑形态，瑞峰方案设计团队深入一线，综合分析了孟加拉国的高温气候、不同厂房的建筑结构、制衣车间的生产工艺要求（如防尘、排异味、保持布料干燥）以及客户对能耗与成本的考量，最终摒弃了“一刀切”的单一方案，创新性地采用了“蒸发式冷风机”与“负压风机+水帘墙”的组合式降温策略。

值得一提的是，在方案规划初期，客户也曾对工业空调抱有期待。但我们深知，孟加拉国作为发展中国家，电力供应紧张、工业基础相对薄弱，若采用传统控温控湿的工业空调，不仅前期设备采购成本高昂，后期巨大的电费开支与维护费用也将成为企业的沉重负担。

本着“为客户解决实际问题，而非简单推销设备”的原则，我们果断放弃了“高大上”却不“接地气”的方案，转而立足于当地经济条件，选择了投资成本低、运行费用极省的风机类组合产品。我们坚信，用科学的流体力学设计与精准的气流组织，完全可以用“巧劲”弥补设备单体的功能局限，为工人们创造出同样舒适的生产环境。

【方案一：针对高大空间——大功率蒸发式冷风机 + 长风管气流组织

在容积巨大的新厂房一楼和老厂房，我们部署了瑞峰大功率不锈钢蒸发式冷风机。

1、核心原理：利用“水蒸发吸热”这一自然物理现象。当室外新鲜空气经过湿润的蒸发湿帘时，水膜吸收空气中的热量迅速蒸发，从而降低空气自身温度。这股被“过滤”且降温后的清新冷气，通过我们精心设计的长风管系统，被精准、均匀地输送到车间内的每一个工作工位。

2、优势体现：

降温显著：相比传统空调，投资和运行成本极低；相比普通风扇，能带来温降达4-10℃的强劲冷风。

空气清新：设备安装在墙体外侧或屋顶，将源源不断的新风引入室内，同时保持正压，将尘埃排出，解决了高大空间通风不良、空气污浊的痛点。

不占空间：室内仅有送风管道，避免了大型设备对生产布局的干扰。

【方案二：针对低矮楼层——负压风机 + 水帘墙负压降温】

在层高仅4米的新厂房二、三、四楼，我们采用了“负压通风”的黄金组合。

1、核心原理：在厂房一侧墙体安装负压风机，强力将室内的热气、粉尘、异味迅速抽出，使室内形成瞬时的负压区。在物理学压强差的作用下，室外空气被自动“吸”向厂房另一侧安装的水帘墙。空气穿过湿润的水帘时，同样被降温、过滤，然后以清风徐来的方式漫过整个车间。

2、改善效果：

体感舒适：这种“穿堂风”式的降温，不仅温度适宜，更带来了舒适的空气流动感，极大地缓解了工人在低矮空间内的压抑和闷热感，有效降低中暑风险，提升工作积极性。

品质保障：快速的气流交换排除了缝纫线头、粉尘和人体汗味，为精细的制衣工序提供了一个洁净、干燥的环境，直接提升了面料的处理质量和成衣的良品率。

【项目价值与深远影响】

此次孟加拉国项目的圆满落地，不仅是瑞峰环保制冷技术实力的又一次证明，其意义远超一个制衣厂的范畴：

1、场景拓展：本方案的成功经验，可完美复制到同样面临高温、高湿、高密度作业的纺织、服装、鞋帽、玩具、包装印刷等劳动密集型行业，为全球各地的劳动者送去清凉。

2、国际口碑：在“一带一路”沿线国家，我们以专业的设计、可靠的设备和高效的施工，赢得了国际客户的尊重和信赖，展示了“中国智造”在环境工程领域的非凡创造力。

3、核心能力：此次面对多建筑形态、多空间布局的复杂工况，瑞峰团队展现出的精准设备选型、创新方案组合及落地施工能力，正是我们敢于承接各类挑战性通风降温工程的底气所在。

4、更重要的是，这个项目证明了：通风降温并非只有“高成本”一条路。只要具备扎实的专业功底和为客户着想的心，完全可以在有限的预算内，通过科学的设计，创造出远超预期的舒适环境。

瑞峰环保制冷，不止于制冷，更致力于为您创造一个绿色、健康、高效的生产空间。无论您的厂房在哪里，结构有多复杂，预算有多少限制，我们都能为您量身定制专属的“清凉方案”。

【 Boutique Project Case 】 Crossing Mountains and Seas, Intelligent Cooling Manufacturing - Madaripur Large Garment Factory in Bangladesh - Evaporative Air Cooler+Negative Pressure Fan+Water Curtain Wall Combination Project

Project Background: Creating Value for Workers in the Backland of the 'World Factory'

Bangladesh, located in the Ganges Delta of South Asia, has a typical tropical monsoon climate with high temperatures and humidity throughout the year. The average temperature during the long summer often hovers above 30 ℃. As the world's second-largest clothing exporting country, the garment industry is a pillar industry of its national economy. The population density here is extremely high, with abundant labor resources, and it is known as a rising star in the "world factory".

With the deepening of the "the Belt and Road" initiative, China Bangladesh economic and trade cooperation has become increasingly close. A large amount of mature Chinese garment manufacturing techniques and management experience have been introduced into the local area, greatly improving production efficiency. However, advanced production processes impose strict requirements on the production environment - high temperatures not only affect the stability of precision sewing equipment, but also lead to physical exhaustion and decreased attention of workers, thereby affecting the yield of finished garments. How to create a healthy and comfortable working environment for the intensive labor force has become the key to the transformation and upgrading of local enterprises.

It is in this context that Chorka Texile Ltd, a large garment enterprise in Bangladesh, has found Ruifeng Environmental Refrigeration, which has been deeply involved in the field of ventilation and cooling for many years.

On site Challenge: Diverse Factory Structures Test Comprehensive Design Ability

Joka Textile is located in Madaripur County, and its factory mainly consists of two parts with different styles, which poses a huge challenge to the design of ventilation and cooling schemes:

1. New factory building (four story concrete structure): Good lighting, but varying floor heights. The first floor is about 7 meters high and the space is spacious; 2、 The third and fourth floors are only about 4 meters high, relatively low. Concrete structures have slow thermal conductivity, but heat is prone to accumulate.

2. Old factory building (four color steel tile bungalows): It has a parallel and continuous structure, with a single story height of 8 meters, which is a typical high-rise space. Color steel tiles absorb heat quickly, and under direct sunlight, the interior feels like a steamer, with a strong sense of stuffiness.

Ruifeng Plan: Adapt to local conditions, combine attacks, and solve the problem of cooling

Faced with such a large span of multiple building forms, the Ruifeng design team went deep into the front line and comprehensively analyzed the high temperature climate in Bangladesh, the building structures of different factories, the production process requirements of garment workshops (such as dust prevention, odor control, and keeping fabrics dry), and customers' considerations of energy consumption and cost. Finally, they abandoned the "one size fits all" single solution and innovatively adopted a combined cooling strategy of "evaporative air cooler" and "negative pressure fan+water curtain wall".

It is worth mentioning that during the initial planning stage, the client also had expectations for industrial air conditioning. But we are well aware that as a developing country, Bangladesh has tight power supply and relatively weak industrial foundation. If traditional temperature and humidity control industrial air conditioners are used, not only will the initial equipment procurement cost be high, but the huge electricity and maintenance costs in the later stage will also become a heavy burden for enterprises.

Based on the principle of "solving practical problems for customers, rather than simply promoting equipment", we have decisively abandoned the "high-end" but not "down-to-earth" solution and instead focused on local economic conditions, choosing a combination of wind turbine products with low investment costs and extremely low operating expenses. We firmly believe that with scientific fluid mechanics design and precise airflow organization, it is possible to use "ingenuity" to compensate for the functional limitations of individual equipment and create the same comfortable production environment for workers.

【 Plan 1: For tall spaces - high-power evaporative air cooler+long duct airflow organization

We have deployed Ruifeng high-power stainless steel evaporative air coolers on the first floor of the new and old factories with huge capacity.

1. Core principle: Utilizing the natural physical phenomenon of "water evaporation absorbing heat". When fresh outdoor air passes through a moist evaporative curtain, the water film absorbs heat from the air and rapidly evaporates, thereby reducing the temperature of the air itself. This fresh air that has been "filtered" and cooled down is accurately and evenly delivered to every workstation in the workshop through our carefully designed long air duct system.

2. Advantages reflected:

Significant cooling: Compared to traditional air conditioning, the investment and operating costs are extremely low; Compared to ordinary fans, it can bring strong cold air with a temperature drop of 4-10 ℃.

Fresh air: The equipment is installed on the outside of the wall or roof, introducing a continuous stream of fresh air into the room while maintaining positive pressure and removing dust, solving the pain points of poor ventilation and air pollution in tall spaces.

Not occupying space: There are only air supply ducts indoors, avoiding interference from large equipment on the production layout.

[Option 2: For low rise floors - negative pressure fan+water curtain wall negative pressure cooling]

We have adopted the golden combination of "negative pressure ventilation" on the second, third, and fourth floors of the new factory building with a floor height of only 4 meters.

1. Core principle: Install a negative pressure fan on one side of the factory wall to quickly extract hot air, dust, and odors from the room, creating an instantaneous negative pressure zone. Under the pressure difference in physics, outdoor air is automatically "sucked" towards the water curtain wall installed on the other side of the factory building. When the air passes through the moist water curtain, it is also cooled and filtered, and then spreads through the entire workshop in a gentle breeze.

2. Improvement effect:

Comfortable sensation: This "through the air" cooling method not only provides a suitable temperature, but also brings a comfortable airflow, greatly relieving workers' depression and stuffiness in low spaces, effectively reducing the risk of heatstroke, and enhancing work enthusiasm.

Quality assurance: Rapid airflow exchange eliminates sewing thread ends, dust, and human sweat odor, providing a clean and dry environment for fine garment manufacturing processes, directly improving the quality of fabric processing and the yield rate of finished garments.

Project Value and Profound Impact

The successful implementation of this Bangladesh project is not only another proof of Ruifeng Environmental Protection's refrigeration technology strength, but its significance goes far beyond the scope of a garment factory:

1. Scenario expansion: The successful experience of this solution can be perfectly replicated in labor-intensive industries such as textiles, clothing, footwear, toys, packaging and printing that also face high temperatures, high humidity, and high-density operations, bringing coolness to workers around the world.

2. International reputation: In the countries along the "the Belt and Road", we have won the respect and trust of international customers with professional design, reliable equipment and efficient construction, demonstrating the extraordinary creativity of "Made in China" in the field of environmental engineering.

3. Core competency: In the face of complex working conditions with multiple building forms and spatial layouts, the Ruifeng team demonstrated precise equipment selection, innovative solution combination, and landing construction capabilities, which is the confidence we have in undertaking various challenging ventilation and cooling projects.

4. More importantly, this project proves that ventilation and cooling are not just about high costs. As long as you have a solid professional foundation and a customer-oriented mindset, you can create a comfortable environment that far exceeds expectations through scientific design within a limited budget.

Ruifeng Environmental Refrigeration is not only dedicated to refrigeration, but also committed to creating a green, healthy, and efficient production space for you. No matter where your factory is, how complex its structure is, or how limited your budget is, we can tailor a personalized "cooling solution" for you.