Lindao Huahai Chengdu Banquet Hotel Central Kitchen Multi-Temp Cold Storage EPC Case

Project Overview

Lindao Huahai Hotel is a large-scale banquet hotel in Chengdu, equipped multi-functional wedding halls, Chinese restaurant and hot pot dining areas. The supporting 285㎡ dual-temperature central kitchen cold storage is designed for daily fresh vegetable, raw meat, semi-finished cooked food storage, supporting daily 1,200+ guest meals supply.
Local climate feature: Chengdu subtropical basin, annual ambient RH 78%–86%, long plum rain season, high temperature and humidity easily cause wall condensation, vegetable mold and meat lipid oxidation without dedicated moisture-proof design.

Core Basic Engineering Data

• Total floor area: 285 ㎡ | Net clear height: 2.8m
• Total nominal volume: 798 m³
• Two fully physically separated independent cold chambers (GB14881 mandatory solid wall partition):
  1. Chilled Zone 0~5℃: Fresh fruits, vegetables, semi-finished cooked dishes
  2. Frozen Zone -18℃: Pork, beef, seafood raw materials
• Full load continuous operation standard: 24h non-stop catering supply, peak summer ambient 35℃
• Construction & full load commission cycle: 42 calendar days
• Compliance certification: GB50072, GB14881 food supervision HACCP audit, NSF sanitary panel standard

Pre-Construction Customer Core Pain Points

• Old simple cold room without physical partition, raw meat and cooked food mixed storage, failed two market food safety inspections with rectification notice;
• Single-layer insulation without full HDPE vapor barrier, wall continuous condensation in rainy season, vegetable mold scrap rate up to 10.1%;
• Single compressor without standby unit, summer high temperature overload shutdown leads whole batch banquet raw material scrapping loss;
• Manual discontinuous temperature records, unable to provide 2-year trace data for supervision spot check;
• Ordinary high-speed air coolers cause serious vegetable dehydration & weight loss, increase daily procurement cost.

1 Sichuan Plum Rain Exclusive Anti-Condensation Envelope System

Comply with GB51440 full warm-side vapor barrier mandatory clause for Chengdu high humidity:

Zone Type	PU Insulation Standard	Local Humidity & Catering Sanitation Optimization
0~5 Chilled Zone	100mm B1 low-smoke zero-halogen PUR (λ=0.023)	Double-layer HDPE full vapor barrier on wall & ceiling, all panel joints filled low-temperature mildew-proof sealant; 50mm seamless inner arc wall for daily high-temperature disinfection
-18 Frozen Zone	150mm B1 high-density PUR (λ=0.020)	Double staggered XPS anti-freeze floor, 1% drainage slope for blood & vegetable sewage flushing

Core construction rule: All ceiling suspension brackets fitted nylon insulation gaskets to eliminate cold bridge sweating; each cold loading door equipped heating air curtain to block hot humid outdoor air inflow.

2 N+1 Redundant Refrigeration System For 24h Banquet Supply

Chilled Zone (0~5℃)

Two sets Kaidi units with Bitzer 4CES-9Y compressors, 1-main-1-standby automatic switching logic; low-speed EC fan evaporator (53dB) to prevent vegetable dehydration; COP up to 4.3 under 7℃ design ambient.

Frozen Zone (-18℃)

One set Kaidi unit with Bitzer 4HE-18Y compressor, spare expansion valve & filter reserved for emergency replacement; hot gas circulation defrost without electric heating to avoid local temp spike.

Power & Monitoring Safety

Dual municipal power supply + UPS for temperature control system; real-time energy consumption monitoring, comprehensive average energy consumption controlled ≤0.9 kW/m³ under full load summer condition.

3 GB14881 HACCP Mandatory Catering Zoning Layout

Three independent physical separated functional areas (no cloth curtain separation allowed):
1. Raw Material Receiving & Pre-Cool Buffer Room
2. Chilled Semi-Finished & Cooked Food Clean Storage Zone
3. Defective / Expired Goods Isolation Cold Room

One-Way People & Goods Flow Rule

Raw material entry → pre-cool buffer → cold storage → kitchen processing outbound; separate staff passage & cargo passage, strictly isolate raw meat and ready-to-eat food to avoid cross-contamination.

Sanitary Hard Requirements

304 stainless steel inner wall panels, seamless arc corners, anti-slip drainage floor; all cold door with automatic closing self-lock device.

4 2-Year Tamper-Proof Intelligent IoT Monitoring Platform

1. Multi-point PT100 sensors, temp fluctuation limited ≤±0.8℃, data auto record every 30 minutes;
2. Encrypted non-editable storage for minimum 2 years, one-click export food supervision audit report;
3. Multi-level linkage alarm: On-site sound-light + mobile SMS remote push for over-limit humidity/temperature.

5 Measurable 12-Month Operation Benefits

1. Solid wall separated raw & cooked zone pass food supervision audit at one time without rectification;
2. Double full vapor barrier eliminate wall condensation, vegetable mold scrap rate reduced from 10.1% down below 1.6%;
3. N+1 standby unit completely avoid banquet raw material loss caused by equipment breakdown;
4. Low-speed evaporator cut vegetable dehydration weight loss by 28%, lower daily procurement cost;
5. Inverter energy-saving unit reduce annual refrigeration electricity consumption by 24%.

6 6 Common Chengdu Hotel Central Kitchen Cold Storage Inspection Pitfalls

1. Only cloth curtain separation instead of solid wall → Direct food safety audit failure
2. Omit double HDPE vapor barrier for Sichuan plum rain → Year-round wall condensation & vegetable mold
3. Single compressor without standby → Banquet raw material mass loss risk in summer
4. Editable temperature records → All trace data invalid for market supervision
5. High-speed air cooler → Severe fruit & vegetable dehydration weight loss
6. No defective goods isolation room → Mandatory rectification within 15 days

FAQ For Chengdu Banquet Hotel Infrastructure Managers

Q1 What special moisture-proof design for Chengdu plum rain cold storage?

Full double HDPE vapor barrier on all wall & ceiling warm side, each cold door fitted heating air curtain to block hot humid air.

Q2 Why hotel central kitchen needs standby compressor?

The hotel operates 24h banquet service; single machine shutdown will cause huge loss of fresh ingredients for wedding and dinner parties.

Q3 What’s the mandatory zoning rule per GB14881?

Raw materials, semi-finished cooked food and expired goods must be separated by solid physical wall, cloth partition does not meet supervision standard.

Q4 How long need to store cold room temperature records?

Minimum 2 years non-editable encrypted storage for food safety spot check.

Custom Hotel Central Kitchen Cold Storage Inquiry

Provide daily banquet guest volume and local summer maximum humidity to get HACCP compliant multi-temperature layout & itemized quotation.

Construction & Completion Photos