Case study of mobile fan ventilation and cooling project for a high-end Western style milk tea coffee shop in Hangzhou

[Project Background]

In Hangzhou, the "Paradise on Earth", a city known as the "world-class socialist modern international metropolis", is developing with its profound historical background and vigorous Internet technology innovation vitality, radiating its unique charm. From the misty rain of West Lake to the modern buildings on both sides of the Qiantang River, from the dawn of civilization in Liangzhu Ancient City to the unique tea and coffee shops scattered throughout the streets and alleys, Hangzhou is becoming a model of perfect integration of tradition and modernity. In recent years, tea beverage brands with local characteristics and regional culture have emerged one after another in Hangzhou's shopping malls and streets, becoming an important part of the city's commercial vitality.

The high-end Western style milk tea coffee shop in this case is located in the bustling area of this city. Hangzhou belongs to a subtropical monsoon climate with distinct four seasons and abundant rainfall. The summer climate is hot and humid. In 2024, the extreme maximum temperature in the urban area reached 43.3 ℃, and the relative humidity in summer was relatively high. This climate characteristic not only results in high indoor temperatures during summer, but also brings an unbearable sense of stuffiness.

This store is a business and leisure venue that offers high-end milk tea, coffee drinks, and Western style meals. Its target customers are mostly young white-collar workers and leisure people who pursue a quality life. The interior decoration of the store is exquisite and fresh, with an elegant style. Although it is equipped with a central air conditioning system as standard, which can maintain the temperature within a suitable range, during peak hours, due to dense personnel and poor indoor air circulation, although the perceived temperature is cool, the concentration of carbon dioxide increases, the freshness of the air decreases, and the stuffiness is still obvious, which affects customers' consumption experience and willingness to stay. In order to further improve the quality of the store environment and create a fresher and more natural resting space, the operator has decided to improve ventilation and cooling without altering the existing decoration and air conditioning system.

[Basis for Scheme Design and Selection]

The design personnel of Ruifeng Environmental Protection Refrigeration conducted an in-depth on-site investigation and comprehensively considered multiple factors:

1. Geographical and climatic factors: Hangzhou has high temperatures and humidity in summer. Although simple cooling has been solved by air conditioning, the problem of poor air circulation caused by dehumidification needs to be improved by introducing a large amount of fresh air.

2. Space characteristics: The store decoration is exquisite, making it impossible to install large-scale air ducts; The internal landscape layout has been determined, and no fixed equipment can damage the visual effect.

3. Passenger flow characteristics: There are obvious "peaks and valleys" in the passenger flow of coffee shops. During peak periods, it is difficult to find a place, and during low peak periods, there are only a few people. Equipment needs to be able to flexibly cope with this uncertainty.

4. Cost considerations: Owners hope to solve the problem of fresh air through low-cost and high-efficiency equipment while controlling investment, avoiding the installation of complex and power consuming large central fresh air systems.

Based on the above analysis, the Ruifeng team innovatively proposed a composite layout scheme of "multiple mobile centrifugal air coolers+mobile industrial grade large fans".

Advantages and Design Principles of the Scheme

The design considerations for this combination scheme are as follows:

1. Flexible response to uncertain customer flow: In response to the uncertainty of coffee shop personnel flow, we have chosen mobile models. The mobile air cooler is equipped with a versatile wheel, which can be easily moved to areas that require enhanced ventilation and cooling. It is plug and play, completely unrestricted by fixed positions. During peak hours, the ventilation should be strengthened in densely populated areas, while during low peak hours, it can be moved to corners or warehouses without affecting the landscape layout of the store.

2. No damage to original equipment, precise replacement: The plan does not alter the original air conditioning equipment and store decoration. The mobile air cooler adopts the principle of positive pressure air supply, always introducing fresh air from the outside and sending it into the room after cooling treatment, forming a large circulation of indoor and outdoor air, effectively solving the problems of poor air circulation and high carbon dioxide concentration in traditional air-conditioned rooms, and completely eliminating the concern of "air conditioning disease".

3. The scientific application of physical principles:

1) Mobile centrifugal air cooler: utilizing the natural physical phenomenon of "evaporation and heat absorption". There is a honeycomb shaped wet curtain made of special material inside the machine, which is kept moist through a water circulation system. When the centrifugal fan is running, negative pressure is generated inside the machine, forcing outdoor air to flow through the porous and moist curtain. The water on the curtain absorbs heat from the air during the evaporation process, thereby forcing the air flowing through the curtain to cool down by 5-12 ℃. This cooling method not only has extremely low energy consumption (only 1/8-1/10 of traditional compression air conditioning), but also increases air humidity, bringing fresh and humid "natural wind".

2) Mobile industrial grade large fan: equipped with a permanent magnet continuously variable speed motor, the large fan blades with a diameter of over 1 meter rotate at low speed, producing a large area of soft three-dimensional natural wind. This kind of wind sensation can promote the circulation of indoor air, accelerate the evaporation of sweat on the surface of the human body, take away heat, and make people feel comfortable and cool. Its physical principle is to simulate the natural breeze effect through a large area of gentle breeze, rather than a straight hard wind, which provides an extremely comfortable sensation.

4. Cost savings and environmental improvement:

1) Energy saving and consumption reducing: The energy consumption of air coolers is only one eighth to one tenth of that of traditional air conditioners. During peak hours when deep cooling is not required and only air circulation needs to be improved, the energy consumption of running mobile air coolers and large fans is much lower than turning on more air conditioning units or fresh air handling units, greatly saving operating expenses.

2) Environmental quality improvement: After the equipment is put into use, the original stuffiness in the store is swept away. The air cooler continuously delivers fresh air that has been cooled, humidified, and purified, combined with the soft natural wind generated by the industrial fan, making customers feel as if they are under the shade of trees by West Lake, enjoying a natural coolness. This' natural wind 'ensures the physical and mental health of personnel and the quality of the environment, significantly improving customer stay time and satisfaction.

5. Landscape friendly, ready to use: The biggest advantage of mobile fans is that they do not require installation. The device has a simple and elegant appearance, which can be reasonably placed in the required location during peak business hours, and can even be used as a spatial partition or decoration; During closing hours or low peak periods, simply unplug the power and easily remove it, without affecting the landscape layout or private event needs of the store the next day.

[Usage Effect and Social Benefit]

After the implementation of the project, the indoor environment of the coffee shop was immediately improved. During peak hours, although there are many people indoors, the air remains fresh and flowing, and the original stuffiness disappears completely. Customers can enjoy exquisite tea drinks while also feeling the comfort of a gentle breeze brushing their faces. According to feedback from the operator, many old customers praised that "the air in the store is better, and I don't feel stuffy even after sitting for an afternoon".

Case Extension and Company Capability Explanation

Although Ruifeng Environmental Protection Refrigeration is undertaking the installation of mobile fans for high-end Western style milk tea cafes, its application scenarios are far more than that. Commercial places with dense personnel, enclosed spaces, and existing air conditioning but insufficient fresh air, such as specialty restaurants, online tea shops, shared spaces in office buildings, creative studios, etc., all have the same pain points. The core competence demonstrated by the Ruifeng team in this project is a profound understanding of special spaces and usage scenarios, as well as precise control over the comprehensive selection and scheme design of ventilation and cooling equipment.

We not only understand the equipment, but also the air requirements in different scenarios. Whether you need cooling, humidification, or simply improving air circulation, Ruifeng can tailor the most cost-effective and effective "natural wind" solution for you, creating the most comfortable space environment with the lowest energy consumption and minimal modifications.