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Selection of Refrigeration Units for a 200㎡ Pork Freezing Cold Storage

2025-08-17 | View:

When selecting a refrigeration unit for a 200㎡ pork freezing cold storage, the core considerations should revolve around the temperature requirements for pork freezing (typically -18℃ to -25℃; long-term storage requires a stable temperature below -18℃, and storage after quick freezing requires a temperature below -20℃), the actual volume of the cold storage (area × height, which affects cooling capacity demand), thermal insulation performance, and local climatic conditions. Avoid estimation based solely on area, as this may lead to deviations in unit selection. The following is a detailed explanation of the selection logic, recommended unit types, and considerations:

I. First, Clarify 2 Key Premises (Directly Affecting Unit Selection)

Before selecting a refrigeration unit, it is necessary to confirm the core parameters of the cold storage; otherwise, the selected unit may be "excessively large (causing waste)" or "too small (insufficient cooling capacity)":

1. Actual Volume of the Cold Storage (Not Just Area)

The 200㎡ refers to the floor area. The total volume (for which cooling capacity demand is calculated) must be determined by combining the floor area with the cold storage height. The height of a typical pork freezing cold storage ranges from 3m to 5m, so the total volume is usually 600~1000m³. The cooling capacity demand varies significantly with different volumes (for example: a cold storage with a height of 3m requires a cooling capacity of approximately 80~120kW, while one with a height of 5m requires around 120~180kW).

2. Thermal Insulation Performance

The thickness of the cold storage's insulation layer (usually 100~150mm thick PU insulation boards with a density ≥40kg/m³) and sealing performance (sealability of door bodies and pipeline joints) directly affect cold loss. Better insulation results in lower unit load, allowing for a more economical unit selection; if insulation is poor, an additional 10%~20% cooling capacity redundancy should be added.

II. Summary: Selection Formula for Refrigeration Units in 200㎡ Pork Freezing Cold Storage

Determine parameters: Area (200㎡) → Cold storage height (3~5m) → Volume (600~1000m³) → Temperature (-18℃~-25℃) → Calculate heat load (80~180kW);
Select the compressor: For a cooling capacity of 80~120kW → reciprocating compressor; for 120~180kW → screw compressor;
Select the condensation method: In water-scarce areas or with sufficient installation space → air-cooled type; in high-temperature areas or with access to water → water-cooled type;
Select the liquid supply method: For regular storage → dry expansion liquid supply; for quick freezing → flooded liquid supply.

Key Term Explanations (for Clarity in Technical Context)

Reciprocating compressor: A type of compressor that uses the reciprocating motion of a piston to compress refrigerant, featuring stable efficiency in medium-low temperature conditions and low maintenance costs.
Screw compressor: A rotary compressor that relies on the meshing of two rotors to compress refrigerant, suitable for large cooling capacity demands with high efficiency and low noise.
Air-cooled condensation: A condensation method that uses fans to force air flow over the condenser for heat dissipation, eliminating the need for a water source and enabling simple installation.
Water-cooled condensation: A condensation method that uses circulating water (via a cooling tower) to cool the condenser, ensuring high heat dissipation efficiency and stable cooling performance even in high temperatures.
Dry expansion liquid supply: A liquid supply method where refrigerant enters the evaporator in a gas-liquid mixture state, characterized by a simple structure and convenient maintenance.
Flooded liquid supply: A liquid supply method where the evaporator is filled with liquid refrigerant, offering higher heat transfer efficiency and suitability for quick freezing scenarios.