Lam Dong is the largest temperate vegetable and flower capital in Vietnam, with a cultivated area exceeding 70,000 hectares, concentrated in... Da Lat City, Don Duong, Duc Trong, Lac Duong, supplying over 50% of high-quality vegetables to the national market and exporting to Japan, Singapore, and South Korea. However, young leafy vegetables (lettuce, spinach, cauliflower) and fresh flowers (roses, carnations, chrysanthemums, orchids) have strong respiratory characteristics and lose moisture extremely quickly. Without a cold storage system at the source, the rate of damage and wilting after harvest can reach 25% – 30%.
Tan Long Refrigeration and Electrical Engineering Joint Stock Company We are a leading and reputable EPC general contractor, specializing in design consulting and construction. Cold storage for vegetables, cool storage for fresh flowers for export, and a vacuum pre-freezing station in Da Lat, Lam Dong.. We apply advanced microclimate control technology, which helps agricultural products stay fresh for 3-5 times longer than with conventional storage methods.
1. Strict Technical Requirements for Preservation of Vegetables and Flowers from Da Lat
- Premium Leafy Vegetables & Root Vegetables (Don Duong, Duc Trong): Hydroponically grown lettuce, baby cauliflower, and bell peppers need to be placed in a pre-cooling or vacuum cooling system to lower their temperature from 25°C. +2°C to +4°C within 30 minutes. Then store in a cool, humid place. 95% – 98% with a gentle convective air velocity of less than 0.2 m/s to avoid damaging the leaf edges.
- Fresh cut flowers for export (Da Lat, Lac Duong): Roses, chrysanthemums, and orchids need to be stored at a certain temperature. +1°C to +3°C, with humidity of 85% – 90% Combined with a thorough ethylene filtration and exhaust fan system, the cold environment helps to inhibit the flowering process, keeping the buds tightly closed and the petals firm throughout the 3-4 weeks of sea transport to Japan.
- Temperate fruits (Strawberries, Da Lat persimmons): We need a cold storage facility. 0°C to +2°C, Controlling Botrytis cinerea mold spores using automated ozone disinfection technology.
2. Technical Specifications for Specialized Storage in Lam Dong Province
| Agricultural products | Chamber temperature range | Relative humidity (RH) | PIR Panel Enclosure Standards | Safe storage period |
|---|---|---|---|---|
| Leafy vegetables and bell peppers from Da Lat | +2°C to +4°C | 95% – 98% (ultra-humidifier) | PIR panel 75 – 100mm | 20-30 days for crisp green leaves |
| Fresh cut flowers for export | +1°C to +3°C | 85% – 90% (Ethylene suction) | 100mm PIR Panel | Keep buds firm for 25-35 days. |
| Fresh strawberries & crisp persimmons | 0°C to +2°C | 90% – 95% | 100mm PIR Panel | 15-25 days without rotting |
3. Standard B2B Equipment Configuration Recommended by Tan Long
- Bitzer (Germany) / Copeland (USA) compressor units: It operates smoothly and adapts well to the plateau terrain and the cool nighttime temperatures in Da Lat.
- Ultrasonic differential humidification system: Automatically adds moisture in the form of 1-3 micron mist droplets, preventing wilting of vegetables and flowers without causing water droplets to form on the leaves.
- Fire-resistant PIR panel enclosure B1/B2 according to QCVN 06:2022/BXD: With superior insulation capabilities and environmental protection, this cold storage facility meets GlobalGAP standards.
- T-Light 304 Stainless Steel Cold Storage Door: Manufactured exclusively by Tan Long, the surface is covered with 304 stainless steel, meeting hygiene and safety standards, and features a 4-way heated gasket to prevent limescale buildup.
4. Estimated Price List for Cold Storage in Lam Dong (B2B)
| Capacity | Warehouse volume | Recommended computer configuration | B2B Technical Estimate |
|---|---|---|---|
| Farm producing 10-30 tons of vegetables and flowers. | 60 – 180 m³ | Bitzer semi-enclosed unit, differential humidifier, 100mm PIR panel, T-Light hinged door. | Detailed cost breakdown based on floor plan. |
| Cooperative exporting 50-150 tons | 300 – 900 m³ | Screw compressor unit, High-capacity evaporator, 100-125mm PIR panel, Sliding door | Prepare technical design documents and Bill of Quantities (BOQ). |
| Agricultural logistics center with a capacity of 300-1,000+ tons. | 1,800 – 6,000+ m³ | Mycom/Bitzer parallel compression station, Pallet racking system, SCADA Cloud | Turnkey EPC general contractor |
👉 Field technical support: Tan Long engineers were present in Da Lat, Don Duong, Duc Trong, and Lac Duong within a certain period. 24 hours.
5. Proof of Tan Long's Practical Project Capabilities
- Automated warehouse general contractor NECS (102,642 pallets) and AJ Total (31,000 pallets).
- HVAC Partner Nutifood, Saigon Food, Vietnam Communist Party.
6. Standard 7-Step EPC Construction Process
- Field survey of farm and substation foundations in Lam Dong.
- Thermodynamic calculations and 3D simulation of the temperature field of the warehouse chamber.
- Prepare a transparent Bill of Quantities (BOQ) and commit to providing genuine equipment with CO/CQ certificates.
- Manufacturing of fire-resistant PIR panel enclosures and T-Light sliding doors at Tan Long factory.
- Transportation and direct installation of complete HVAC systems at the factory.
- Nitrogen pressure testing, vacuuming, gas charging, and acceptance testing followed by a 72-hour chamber cooling test.
- Handover of operations, instruction on safety procedures, and warranty activation are available 24/7.
7. Frequently Asked Questions (FAQ)
1. Will fresh flowers stored in cold storage bloom before export?
No. Temperatures of +1°C to +3°C combined with a thorough ethylene gas filtration system will completely slow down the biological processes, keeping the flowers in a perfect dormant state.
2. Given that Da Lat's climate is cold at night and sunny during the day, will the compressor experience pressure fluctuations?
Tan Long's electrical control panel system integrates a frequency inverter to control the condenser fan speed according to ambient temperature, maintaining stable condensation pressure for 24 hours.
Investing in Cold Storage for Exporting Vegetables, Fruits & Fresh Flowers in Da Lat
Contact Tan Long Engineers today to receive modern cold storage solutions that maximize the preservation of the quality of fresh vegetables, fruits, and flowers in Lam Dong.
Cold Storage Construction Project in Adjacent Areas of the Central Highlands and South Central Vietnam
Areas specializing in durian, dragon fruit, avocado, coffee, passion fruit for export, and temperate fruits in Da Lat require high-standard cold storage. Tan Long's engineering team is ready to conduct on-site surveys and provide technical support within 24 hours.
Engineer Nguyen Toan Thinh (Technical Director)
With over 18 years of practical experience in directing, consulting, designing, and constructing heavy industrial refrigeration systems, ASRS automated warehouses, and IQF freezing systems across more than 29 major national projects.
