applications

Temperature Control and Dehumidification Solution

Mushroom cultivation requires precise control of temperature, humidity, and air quality throughout different growth stages. Continuous ventilation is essential to remove excess moisture and carbon dioxide, but traditional direct air exchange often causes large temperature fluctuations and high energy consumption. Integrating an air-to-air heat exchanger into the fresh air system provides an effective solution for simultaneous temperature control and dehumidification in mushroom growing rooms.

Challenges in Mushroom Room Ventilation

Mushroom growing facilities typically face the following issues:

Continuous demand for fresh air supply
High humidity exhaust air with significant moisture content
Direct ventilation leading to unstable indoor temperatures
High heating demand in winter and increased cooling load in summer
Difficulty maintaining stable humidity levels, affecting yield and quality

An energy-efficient ventilation solution is required to balance fresh air supply, moisture removal, and thermal stability.

Working Principle of the Air-to-Air Heat Exchanger

The air-to-air heat exchanger enables energy transfer between exhaust air and incoming fresh air without air mixing:

Warm, humid air is extracted from the mushroom room
Exhaust air and outdoor fresh air pass through the heat exchanger core
Thermal energy is transferred through the heat exchange surfaces
The two air streams remain completely separated, preventing contamination
Preheated or precooled fresh air enters the growing room with reduced thermal and moisture load

This process allows ventilation, temperature regulation, and dehumidification to operate simultaneously.

Temperature Control and Dehumidification Performance

Temperature Regulation

During winter operation, heat from the exhaust air is recovered to preheat incoming fresh air, significantly reducing heating demand.
During summer operation, incoming air is precooled, lowering the cooling load of the system.

Moisture Removal

Continuous exhaust of high-humidity air effectively reduces indoor moisture levels while maintaining stable room temperature, preventing excessive condensation and environmental stress on mushroom growth.

Technical Advantages

Designed for high-humidity operating conditions
Heat exchange cores available in aluminum foil or stainless steel materials
Complete air separation eliminates cross-contamination and odor backflow
Compact structure, easy integration with fresh air handling units
Stable operation with low maintenance requirements

Typical Applications

Suitable for various mushroom cultivation environments, including:

Oyster mushroom, shiitake, enoki, and king oyster mushroom growing rooms
Industrial-scale mushroom production facilities
Incubation rooms and fruiting rooms
High-humidity environments requiring continuous ventilation

System Benefits

By integrating an air-to-air heat exchanger into the mushroom room fresh air system, operators can achieve:

Stable temperature and humidity control
Reduced energy consumption for heating and cooling
Improved indoor air quality and healthier mushroom growth
Lower operating costs and higher production efficiency
Energy-saving and modernized mushroom cultivation facilities

Conclusion

The air-to-air heat exchanger provides a practical and energy-efficient solution for mushroom growing rooms by combining ventilation, temperature regulation, and dehumidification in a single system. It ensures a stable growing environment while significantly reducing energy consumption, making it an ideal choice for modern mushroom cultivation operations.

There are many drying equipment is often used to raise the air (fresh air) to a certain temperature and process the materials. Such as, food, chemical, pharmaceutical, electronics, spraying, printing, paper, chemical fiber and other industries. However, the used air is discharged as exhaust gas (exhaust air), and the exhaust gas is usually high in temperature and directly discharged into the atmosphere, which will cause a lot of energy waste.

Drying case

For example, assuming a place with an annual average temperature of 10°C, a drying system air volume of 10000m3/h, and a drying process temperature of 80°C, it is necessary to provide about 235kW of heat to the drying box by means of electric or steam heating. The process is as follows, if the exhaust gas is directly discharged, the 235 kW of heat heated by electric or steam is will discharged into atmosphere, resulting in a waste of energy.

Schematic diagram of fresh air ventilation equipment with heat recovery

In the exhaust gas emission system, adding a heat exchange box that can realize the waste heat recovery.

The main component of the heat exchange box is the BXB plate heat exchanger. The plate heat exchanger is mainly made of aluminum foil (or stainless steel foil). When there is a temperature difference between two airflows that are isolated by aluminum foil and flow in opposite directions, heat transfer will occur to realize energy recovery. Through the BXB air sensible heat exchanger, the conversion in the exhaust air can be used to preheat the fresh air. As the result, it will achieve the purpose of energy saving.

Energy saving effect analysis

According to the previous example, use the heat in the exhaust air to preheat the fresh air from heat exchange box. The fresh air temperature increased from 10℃ to 52.5℃, and the heat input from the heating box is reduced from 235kW to 109kW, which saves 126kW of heat and reduces the amount of electricity or steam consumed for fresh air heating. The process is as follows:

Category applications

Air-to-Air Heat Exchanger for Fresh Air Systems in Mushroom Growing Rooms