Flour Production Workshop Ventilation and Cooling Project for Grain & Oil Enterprise

Project Overview

This project focuses on a flour production workshop in a Fujian-based grain and oil enterprise, comprising blending and cleaning rooms with a single-floor area of approximately 2,000 square meters, constructed with a reinforced concrete frame structure. The workshop houses densely arranged equipment operating continuously, generating persistent process waste heat. Due to the large east-west and north-south span of the facility, natural ventilation airflow is disorganized, resulting in inefficient heat and humidity exchange during summer and creating a chronically hot, stuffy environment.

The environment poses three critical risks:

· Safety Risks: Dry conditions accelerate the suspension and dispersion of micron-level flour particles. When dust concentration reaches the lower explosive limit (LEL), combustion and explosion hazards arise.

· Quality Risks: High temperatures cause thermal degradation of flour components, affecting starch gelatinization properties and gluten protein functionality, leading to deviations in finished product quality standards.

· Health Risks: Elevated temperatures reduce worker efficiency and trigger occupational heat stress reactions.

Addressing these issues from perspectives of safety, quality control, and occupational health, thermal environment regulation has become a critical priority. Aolan’s evaporative cooling technology effectively lowers workshop temperatures, improves air quality, mitigates heat and dust impacts on workers, and significantly enhances workplace comfort.

Operational Design

The design deploys 64 Aolan Duo-series evaporative air coolers evenly distributed on the north and south sides of the 1st, 2nd, 5th, and 8th floors. These units deliver direct indoor air supply through ducts to achieve holistic cooling and humidification. A centralized PC-based control system allows real-time monitoring of all coolers via an operation platform in the 2nd-floor control room. Clients can flexibly activate or deactivate individual or multiple coolers based on operational needs, enabling efficient and user-friendly management.

Performance Results

Field measurements confirm that during peak summer, the air outlet temperature of the coolers remains consistently below 28°C. The implementation of these units has significantly reduced workshop temperatures, improved indoor air quality, alleviated heat and dust impacts on workers, and enhanced overall comfort. By maintaining positive air pressure through continuous airflow, the system also minimizes external dust ingress. The project has successfully achieved its goals of temperature reduction, dust suppression, and workplace environment optimization.