Refrigeration and freezing project of the Second Institute of Oceanography, China Oceanic Administra

Refrigeration and freezing project of the Second Institute of Oceanography, China Oceanic Administration

Refrigeration and freezing project of the Second Institute of Oceanography, China Oceanic Administration

Project Overview

Cold storage location: China

Cold storage type: -20℃ freezer, 2~8℃ cold storage

Cold storage use: storage of marine biological reagents

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Project details

The Second Institute of Oceanography of the China Oceanic Administration is affiliated to the State Oceanic Administration, and is mainly engaged in ocean and polar marine scientific research: high-tech research and development and application of marine environment and resource exploration and exploration. The low-temperature refrigeration project has been jointly calculated and confirmed by the Hanyang Refrigeration Design Department, Engineering Department and the Technical Department of the Second Ocean Institute to confirm the best cold storage design plan and cold storage construction plan, and it has been put into normal use.

The warehouse insulation materials and cold storage doors of the project are made of polyurethane single-sided 0.8mm304 stainless steel plate, which has many advantages such as corrosion resistance, anti-aging, flame retardant, attenuation, beauty and firmness, long service life, and fast cooling.

The complete system of refrigeration compressor unit, air cooler, expansion valve and circuit control box of this project adopts Mitsubishi products. High operating efficiency and stable performance. Each cold storage refrigeration system adopts one for use and one for backup. When the unit or air cooler fails, it does not affect the normal cooling of the cold storage. The unit has various complete alarm and protection functions such as overload, overheat, oil cut, overpressure and underpressure, pressure, overtemperature, etc.

The project's control system will automatically frost according to the set time period (commands can be executed manually during the period); the warehouse temperature sensor is used to control the system; the warehouse is also equipped with temperature

Mitsubishi DC Inverter Refrigeration System

Energy saving

The frequency conversion device can be used to change the power frequency within the range of 20Hz~90Hz, and the speed of the compressor also changes proportionally to adapt to changes in environmental conditions caused by the seasons. Mitsubishi Electric's unique intelligent temperature control, callback control and fan control can save about 30% of electricity consumption throughout the year.

reliable

The double-temperature start/stop of the frequency conversion condensing unit is smooth and the number of times is small, which effectively reduces the damage to the equipment. Operating at the optimal evaporation temperature, even if the load is reduced, the frequency control can also maintain the evaporation temperature at a certain level, suppressing the reduction in efficiency and the amount of frost. At the same time, the Mitsubishi variable frequency motor has high tracking of load changes, which can effectively suppress the temperature fluctuation range in the storage and realize the stability of the temperature in the storage.

Strong application

One controller can control up to 300 square meters of cold storage, about 150 square meters of freezer, and only need a switch setting to optimize the defrosting operation. At the same time, Mitsubishi Electric's unique air outlet cover and return air hood can effectively avoid the problem of temperature rise in the cold storage during defrosting, and can reduce the defrosting time by 15 to 30%.