2,666 m³ Multi-Temp Cold Storage EPC Case for Chunfa Biotech (Wuzhong Ningxia)

Author: Senior Northwest Severe Cold Halal Food Cold Chain Engineer

12 years cold storage EPC experience for Ningxia, Gansu halal food & flavoring biotech factories. Familiar with GB 50072-2021 cold storage standard, GB/T24400 HACCP food warehouse norm, GB30616 food flavor storage specification and Ningxia -22℃ severe cold anti-freeze construction code. Completed dozens of flavor raw material cold warehouse projects in Yinchuan, Wuzhong industrial parks.

Project Overview

This full turnkey multi-temperature cold storage is custom-built for Chunshengyuan Biotechnology (subsidiary of Tianjin Chunfa Group), a specialized halal food flavor & meat extract manufacturer located in Litong Industrial Park, Wuzhong, Ningxia.
Local climate feature: Winter extreme low temperature -22℃, day-night temperature difference over 35℃, strong wind & heavy snowfall; flavor raw materials & finished concentrates are sensitive to temperature fluctuation, oxidation and cross odor mixing. The whole project adopts severe cold anti-freeze + HACCP halal food dual customized design to solve original warehouse mass flavor deterioration & winter unit shutdown problems.

Core Basic Project Data

• Total effective volume: 2,666 m³
  1. Chilled zone (2 rooms): 261 ㎡ ×4.4m = 1148 m³, temp 0~5℃ for flavor raw materials
  2. Frozen zone (1 room): 360 ㎡ ×4.4m = 1518 m³, temp -15~-18℃ for finished meat concentrates
• GB standard storage capacity calculation:
  Utilization coefficient η=0.52, flavor carton density ρ=0.28 t/m³
  Total usable tonnage = 2666 × 0.52 × 0.28 ≈ 388 tons
• Full construction & commission cycle: 60 calendar days (customer urgent production schedule demand)
• Compliance certification: GB 50072, HACCP food safety audit, halal production storage specification
  

Pre-Construction Core Pain Points

• Old temporary cold room without independent partition, different flavors cross-odor mixing, annual oxidation scrap rate up to 10.6%;
• Ordinary outdoor units without winter anti-freeze protection, condenser frost blockage leads weekly shutdown;
• Editable manual temperature records, failed local market food supervision inspection twice;
• No standby compressor, power outage risk causes full batch high-value flavor raw material loss;
• Thin single-layer insulation without double vapor barrier, wall condensation accelerates raw material deterioration.

1 Ningxia Severe Cold Exclusive Envelope & Anti-Freeze Structure

Design adapted to -22℃ winter ambient per GB 50072 severe cold clause:

Component	Standard Matching	Northwest Anti-Freeze Optimization
Wall & Ceiling PU Panel	Chiller:100mm B1 PUR; Freezer:150mm B1 PUR	Double-layer full HDPE warm-side vapor barrier, thickened snow load reinforced steel roof keel
Floor Insulation	Double staggered 50mm XPS anti-frost board	Slope drainage, all drain pipes equipped electric heat tracing to avoid winter ice blockage
Cold Door & Vestibule	Stainless thermal break sliding door	Full heating air curtain to block cold wind inflow during loading

Core construction rule: All pipeline & suspension holes filled low-temperature anti-cold-bridge sealant; outdoor unit fitted integrated wind & snow shelter cover.

2 Redundant Refrigeration System Adapted To Low Ambient

0~5℃ Chilled Zone (Copeland Scroll Parallel Rack)

Two independent rooms equipped separate one-main-one-standby scroll unit, low-speed air cooler (0.3–0.6m/s) to prevent flavor volatile loss & cross odor.

-18℃ Frozen Zone (Bitzer Piston Unit)

Single chamber 1+1 standby piston compressor, automatic crankcase heater to keep oil fluidity under -22℃ outdoor temp; pressure regulating valve to stabilize winter condensation pressure, avoid overload damage.

Power Safety Standard

Dual municipal power supply + 72h UPS for temperature monitoring system, continuous non-editable data recording during power cut.

3 HACCP Halal Food Exclusive Zoning & Logistics Layout

Mandatory three independent isolated zones to avoid cross-contamination of halal raw materials:
1. Raw material receiving & pending inspection area
2. Qualified flavor & concentrate storage area (separated by flavor varieties)
3. Defective/expired goods isolation room
One-way people & goods flow design: Raw material entry → cold storage → finished outbound, no cross traffic; all wall 50mm seamless inner arc corners for daily food disinfection, no mold dead angle.

4 Constant Humidity Intelligent Monitoring System

Flavor storage fixed RH standard: 60–65% to slow oxidation & volatile loss
1. Multi-point PT100 sensors, temp fluctuation controlled ≤±0.5℃ per GB30616;
2. 5-year non-editable encrypted temperature & humidity log, one-click export for food supervision audit;
3. Multi-level linkage alarm: On-site sound-light + mobile SMS remote push for overtime deviation.

5 Measurable 12-Month Post-Operation Benefits

1. Independent partition & low-speed fan eliminate cross odor mixing, flavor oxidation scrap rate reduced from 10.6% down below 1.8%;
2. Severe cold anti-freeze unit shelter & pipeline heat tracing completely solve winter shutdown fault;
3. Full standby refrigeration eliminate power outage raw material scrap risk;
4. HACCP standardized layout & tamper-proof record pass food inspection one time without rectification;
5. Inverter parallel rack + double vapor barrier energy-saving design cut annual electricity consumption by 24%.

6 6 Common Northwest Halal Food Cold Storage Inspection Pitfalls

1. No independent isolation room for defective flavor → Direct HACCP audit failure
2. Omit outdoor unit wind & snow shelter → Winter condenser full frost, frequent shutdown
3. High-speed air cooler adopted → Flavor volatile loss & cross odor pollution
4. Editable temperature recording system → All audit data invalid
5. Single compressor without standby → High-value raw material total loss risk during breakdown
6. Single-layer vapor barrier for northwest large temp difference → Permanent wall condensation

FAQ For Northwest Halal Flavor Biotech Factories

Q1 What special refrigeration design for Ningxia -22℃ winter?

All outdoor compressors fitted wind-snow shelter, crankcase constant heater, drain pipeline electric heat tracing to prevent frost blockage & oil solidification.

Q2 Why flavor cold storage needs low-speed air coolers?

High wind speed accelerates volatile flavor component loss and cross-odor mixing between different raw materials, fixed airflow 0.3–0.6m/s is mandatory.

Q3 What humidity standard for halal meat extract & flavor storage?

Stable RH 60–65% to restrain lipid oxidation and slow flavor deterioration per GB30616.

Q4 What zoning requirement for halal food HACCP audit?

Must set separated pending inspection, qualified goods and defective isolation three zones with physical wall partition, one-way logistics without cross contamination.

Custom Northwest Severe Cold Halal Food Cold Storage Inquiry

Provide factory area, stored flavor/meat extract tonnage and local minimum winter temperature to get free anti-freeze layout & HACCP compliant quotation.

Construction & Completion Photos