Views: 0 Author: Site Editor Publish Time: 2026-10-14 Origin: Site
Wheat harvested in summer often enters silos and flat warehouses at temperatures between 28°C and 38°C with moisture contents of 13% to 15%. Under these warm conditions, grain respiration accelerates exponentially, creating self-heating "hot spots", degrading gluten and baking quality, and triggering explosive insect infestations within weeks.
At CSTHEATEXCHANGER, we engineer and manufacture Mobile & Stationary Industrial Grain Coolers (Grain Chillers). In this technical guide, our thermal engineers explain how mechanical grain refrigeration stabilizes bulk wheat bulks, eliminates chemical fumigation, and preserves baking performance.
Bulk wheat has a low thermal conductivity (k≈0.15 W/m⋅Kk≈0.15 W/m⋅K), acting like an insulator. Once heat accumulates inside a 10,000-ton silo, natural cooling takes months.
CSTHEATEXCHANGER GRAIN CHILLING SYSTEM FLOW
┌────────────────────────────────────────────────────────────────────────┐
│ CSTHEATEXCHANGER Grain Chilling Unit (High-Static Pressure Centrifugal)│
├────────────────────────────────────────────────────────────────────────┤
│ [Ambient Air 35°C] ──► [Deep Evaporator Coil] ──► [Reheat Coil 12°C] │
└───────────────────────────────────┬────────────────────────────────────┘
│ Conditioned Air (10°C - 13°C, 60% RH)
▼
┌────────────────────────────────────────────────────────────────────────┐
│ Grain Silo Aeration Grid (Under-Floor Perforated Ducts) │
├────────────────────────────────────────────────────────────────────────┤
│ ▲▲▲ Upward Moving Cold Front Cooling Deep Wheat Bed (3,000 Pa Static) │
│ [Wheat Bulk Pulldown: 35°C ──► 12°C in 48–72 Hours] │
└────────────────────────────────────────────────────────────────────────┘Cooling Front Propagation: Conditioned cold air (10∘C−13∘C10∘C−13∘C) moves as an upward cooling boundary through the grain mass, pushing warm headspace air out through roof exhaust vents.
Psychrometric Equilibrium Moisture Control: Integrated reheat coils warm the chilled air slightly, fixing relative humidity at 60%–65% RH so the wheat neither dries out nor absorbs unwanted moisture.
Engineering Specification | CSTHEATEXCHANGER Wheat Grain Cooler Series |
|---|---|
Cooling Capacity Range | 35 kW to 350 kW (100 to 1,200 Tons/Day Cooling Rate) |
Airflow Volume Range | 3,000 m3/h3,000 m3/h to 28,000 m3/h28,000 m3/h |
External Static Pressure | 1,500 Pa to 3,500 Pa (Overcomes deep silo grain resistance) |
Discharge Air Temperature | +10.0∘C+10.0∘C to +14.0∘C+14.0∘C (Modulating precision) |
Discharge Air Relative Humidity | 60%60% to 68%68% RH (Prevents moisture migration & condensation) |
Refrigerant & Compressors | Semi-hermetic screw/scroll compressors (R410A / R407C / R134a) |
Chassis Configuration | Heavy-duty mobile trailer or containerized skid with forklift slots |
High-Static Centrifugal Fans: Custom engineered to overcome the dense aerodynamic resistance of 20-to-30-meter deep wheat columns.
Hydrophilic E-Coated Coils: Deep-row copper-tube aluminum-fin coils with electro-coating to resist dust abrasion and agricultural chemical vapors.
Smart PLC & Inverter Controls: Automatic ambient compensation logic matches fan speed and cooling stages to ambient wet-bulb conditions.
Website: www.cstheatexchanger.com
Email: info@cstheatexchanger.com
Phone / WhatsApp: +86 0519 8878 2189 / +86 181 3659 3690
Manufacturer: Changzhou Vrcoolertech Refrigeration Co., Ltd., Changzhou, Jiangsu, China
