Project Background and Challenge: Creating a Comfortable Dining Environment for Students

This project is located in the cafeteria of Shencun Middle School in Beijiao Town, Shunde District, Foshan City. Shunde is located in the hinterland of the the Pearl River Delta and has a subtropical marine monsoon climate. It has a long high temperature and high humidity in summer and feels stuffy. As the core living facilities of boarding schools, the school cafeteria bears the responsibility of providing three meals a day for all teachers and students. Its environmental quality not only affects students' dietary health, but also directly affects their dining mood and the overall teaching quality of the school. A cool and well ventilated dining environment is an important part of enhancing students' sense of happiness in campus life.

The canteen is a single story large flat structure, with a color steel tile roof and brick walls. Although the lighting is good, the strong thermal conductivity of the color steel tiles makes the indoor space feel like a "steamer" in summer. The total area of the cafeteria is 6000 square meters, with a height of about 10 meters, divided into a student dining area and a teacher dining area. Due to the boarding system, nearly a thousand students flock in at the same time during peak meal times, resulting in a high density of people and a surge in indoor carbon dioxide concentration and heat accumulation. Natural ventilation and fans alone cannot solve the problem of stuffiness, and improving the dining environment is urgent.

Design Proposal: Combination of High Airflow Centrifugal Air Cooler and Long Duct Layout

In response to the special situation of the canteen, the design team of Ruifeng Environmental Protection Refrigeration conducted an in-depth on-site survey and comprehensively considered various factors such as the high temperature and high humidity climate characteristics of Foshan, the strong heat absorption of the color steel tile structure, the large space of up to 10 meters, and the huge heat load generated by dense personnel during peak hours. They abandoned the ineffective solutions of traditional household air conditioning or ordinary fans and ultimately developed a highly targeted professional solution:

1. Core equipment: high air volume centrifugal air cooler

We use industrial grade high air volume centrifugal air coolers as the cooling source. The core principle is to utilize the natural physical phenomenon of "water evaporation absorbs heat": when fresh outdoor air passes through a wet curtain, the water film quickly absorbs heat from the air and evaporates, thereby reducing the air temperature by 4-10 ℃ and increasing air humidity. Centrifugal fans are responsible for delivering cool, moist, and clean fresh air into ducts with powerful power, achieving long-distance transportation.

2. Installation layout: External device+long air duct for uniform air supply

In order to maximize the use of indoor space, we installed all the air cooling equipment on the outside of the building walls, without occupying any valuable dining area inside the cafeteria. The air conditioning is guided to the upper space of the cafeteria, which is 10 meters high, through a carefully designed network of long air ducts. Through the numerous air outlets on the air duct, the cold air evenly sinks downwards, covering the entire dining area. This "upward return" airflow organization method can effectively replace indoor hot air. The fresh air sent in by high air volume forms a slight positive pressure indoors, squeezing out the turbid air exhaled by teachers and students, the waste heat transmitted by the stove, and the thermal radiation from the color steel tile roof through the gaps between doors and windows, achieving comprehensive air replacement and cooling.

3. Detail consideration: Air curtain blocks the loss of cooling capacity

Considering the extremely frequent entry and exit of personnel during peak dining hours in the cafeteria, if the main door is kept open, a large amount of indoor air conditioning will leak out, resulting in energy waste; If the gate is constantly closed, it will seriously affect the efficiency of traffic. For this reason, we have specially installed air curtains above the entrance and exit gates. (Professional expansion: The working principle of a wind curtain machine is to generate an invisible air curtain wall through strong wind power. This high-speed airflow can effectively separate indoor and outdoor air, blocking outdoor heat waves, mosquitoes, and dust from entering, preventing indoor cold air from overflowing, and ensuring smooth passage of people and vehicles. It is an energy-saving and environmentally friendly "invisible door" for large public places.)

Engineering Effectiveness and Value

After the completion of the project, the environment of the cafeteria at Shencun Middle School has undergone a revolutionary improvement. Even at noon in the scorching summer, teachers and students can feel the cool and fresh air rushing into the cafeteria, bidding farewell to the embarrassing situation of "eating for five minutes and sweating for an hour" in the past. The comfortable dining environment has received unanimous praise from all teachers and students, reflecting the school's meticulous care for students' quality of life and indirectly enhancing the overall image of the school.

[Case extension: Reflection of Ruifeng's professional strength]

The success of the Shencun Middle School cafeteria project, although a typical case of school projects, has a business impact far beyond this. The strong capabilities demonstrated by this plan are also applicable to various large industrial plants, warehousing and logistics centers, supermarkets, sports venues, exhibition halls and other large space venues.

This case fully proves that Ruifeng Environmental Protection Refrigeration has the following core capabilities:

1. Accurate comprehensive selection ability: able to accurately match the most suitable high air volume equipment among numerous devices based on complex on-site environments.

2. Strong design ability: Proficient in long duct layout design, ensuring even airflow coverage of large spaces without blind spots.

3. Professional detail handling ability: From saving space on external devices to installing air curtains at entrances and exits, every detail reflects our ultimate pursuit of engineering quality, ensuring that the solution is not only efficient, but also user-friendly and energy-saving.

Choosing Ruifeng is not only about choosing a set of cooling equipment, but also about choosing a professional solution for the problem of ventilation and cooling in large spaces.