A parallel screw compressor unit is the heart of large cold storage facilities (typically above 1,000㎡). It connects multiple screw compressors in parallel, sharing one condensing and control system for "teamwork." Compared to the evaporative condenser integrated unit you asked about earlier, it has a higher initial investment but is extremely energy-efficient in long-term operation and comes with built-in backup.</p><p><br/></p><p><strong>I. 2026 Price Reference</strong></p><p><br/></p><p>Parallel units are priced per "set," with a wide range depending mainly on compressor brand and cooling capacity:</p><p><br/></p><p>Configuration Level | Applicable Cold Storage Size | Reference Unit Price (10,000 RMB) | Key Features</p><p><br/></p><p>Domestic Economy | 1,000–3,000㎡ Freezer | 8 – 20 | Domestic compressor heads (e.g., Hanbell, Snowman), high cost-performance</p><p><br/></p><p>JV Mainstream | 3,000–5,000㎡ Logistics Warehouse | 20 – 50 | Bitzer, Refcomp, etc., strong stability</p><p><br/></p><p>High-End/Explosion-Proof | 5,000㎡+ or Chemical/Pharmaceutical | 50 – 150+ | Imported compressor heads, fully redundant design, explosion-proof certification</p><p><br/></p><p>Note: Prices above are for the unit equipment only, excluding installation, piping, and electrical control cabinet upgrades. Small cold storage (<500㎡) is generally not recommended for screw parallel systems, as scroll compressors offer better cost-effectiveness.</p><p><br/></p><p><strong>II. Core Advantages: Why Is It a Must for Large Cold Storage?</strong></p><p><br/></p><p>1. Built-in Backup (High Reliability)</p><p> ◦ If one compressor fails, the others continue running, so the cold storage never shuts down completely—critical for storing high-value goods.</p><p><br/></p><p>2. Energy-Efficient Like Inverter AC (High Efficiency at Partial Load)</p><p> ◦ Cold storage rarely runs at full load. The parallel unit uses intelligent control to start only the compressors needed, avoiding "overkill," and reduces overall energy consumption by 20%–30% compared to a single large compressor.</p><p><br/></p><p>3. Compact Machine Room Footprint</p><p> ◦ Multiple compressors share oil separators and liquid receivers on a single base, saving 30%–40% of machine room space compared to installing multiple separate units.</p><p><br/></p><p><strong>III. Implementation Advice and Pitfall Avoidance</strong></p><p><br/></p><p>1. Applicability Threshold</p><p> ◦ Area: Generally recommended for freezers/cold rooms above 1,000㎡. Using this for a few hundred square meters is overkill and the payback period is too long.</p><p><br/></p><p> ◦ Power: Requires 380V industrial power, and the starting current is high; grid capacity must be confirmed.</p><p><br/></p><p>2. Local Selection Strategy</p><p> ◦ First choice: "Evaporative condenser + parallel screw" combination. In hot summers, evaporative condensers dissipate heat effectively and further lower condensing temperature—this is the mainstream high-efficiency solution for large cold chain projects.</p><p><br/></p><p> ◦ Brand selection: If budget is limited and noise is not a concern, choose domestic first-tier brands (e.g., Moon, Snowman); for ultimate stability and low noise, choose JV/imported brands like Bitzer or Hanbell.</p><p><br/></p><p>3. Pitfalls to Avoid</p><p> ◦ Don't just look at the compressor head price: Ask whether the quote includes oil separators, gas-liquid separators, common base, and intelligent control cabinet. Some low-price contracts sell these separately, causing the total cost to skyrocket.</p><p><br/></p><p> ◦ Maintenance costs: Screw compressor repair requires high technical expertise. Ensure the manufacturer has a resident after-sales team; otherwise, if a compressor head seizes, downtime losses can be enormous.</p><p><br/></p><p><strong>IV. Quick Budget Estimate</strong></p><p><br/></p><p>Suppose you are building a 2,000㎡ -18℃ freezer:</p><p>• Unit selection: Approximately 60–80 HP cooling capacity, choose a domestic dual-compressor parallel unit.</p><p><br/></p><p>• Budget estimate: Equipment price around 120,000–180,000 RMB (excluding installation).</p><p><br/></p><p>In summary: Parallel screw compressor units are a powerful tool for cost reduction and efficiency improvement in large cold storage. Although the initial equipment cost is higher (starting at 80,000–100,000 RMB), thanks to energy savings and backup capability, in large projects running over 10 hours a day, the difference is typically recovered through electricity savings within 2–3 years.</p>
