Introduction to the performance of cold storage aluminum pipes

Introduction to the performance of cold storage aluminum exhaust pipes
With the continuous updating of refrigeration technology, aluminum exhaust pipes are also getting more recognition and use in the refrigeration industry. Nowadays, aluminum pipes are mainly used in the refrigeration system of cold storage from
b ℃
℃
to
br ℃
℃
It is an ideal evaporator for various types of food freezing and cold storage.
.
The main features of energy-saving aluminum rows:
The material of the aluminum row pipes is aluminum alloy with strong anti-corrosion ability. The surface is anodized. The structure of the aluminum rows is designed to be die-cast with fins and tubes. The diameters are
,
,
and other specifications. There are internal parallel serrations in the tube, and multiple fin tubes are installed in parallel. The bent tubes are welded to form a large-area aluminum row.
The special structure increases the internal and external areas and at the same time improves the compressive strength. It has undergone
air tightness inspection and
pressure life test before leaving the factory. The surface has been strengthened to resist corrosion and extend its service life.
.
Outstanding energy-saving effect:
(
) Good thermal conductivity: Aluminum alloy has excellent thermal conductivity. The difference between the evaporation temperature of the refrigerant and the temperature of the outer surface of the aluminum exhaust will be reduced, and the evaporation The temperature will increase, the energy efficiency ratio of the compressor will increase, and energy consumption will decrease
(
) Special structure: the fins of the aluminum alloy fin tube are parallel to the aluminum tube, forming a sheet shape, and the formed aluminum row will The finned tubes are fixed in parallel to form several parallel channels. When the refrigeration system is working, the cold air forms a flue effect in the channels, is accelerated to sink, and convection is accelerated, so the cooling speed is fast and a lot of electricity is saved
(
) Good setting, high efficiency: The ratio of the projected area of the aluminum row to the evaporation area can be one to three or one to four. The aluminum rows can all be installed on the top surface of the cold storage, and the heat exchange capacity per unit area is higher than that of the use of Wall pipes are more efficient and energy-saving, have a certain cold storage effect, reduce the frequent starting rate of the compressor when working, and save electricity consumption
(
) Light weight, easy to install:
- Aluminum The ratio of the weight of the row to the area of the evaporator is Ф
About one-sixth of the steel pipe, easy installation can save a lot of structural investment
(
) The amount of refrigerant is small: the aluminum pipe has an inner The ribs increase the contact area of the refrigerant, and the external fins increase the contact with the air, which greatly improves the refrigerant utilization rate and reduces the system refrigerant consumption.
.
Less dry food consumption and small temperature fluctuations in the warehouse:
The aluminum row is hoisted on the top of the warehouse to form direct cooling natural convection heat transfer, which minimizes the dry consumption of the cooled food. Food preservation effect is better. There is less frost on the aluminum rows and the frost layer is as thin as snowflakes. The defrosting cycle is extended to facilitate manual mechanical defrosting, which is convenient and energy-saving. The humidity in the warehouse is moderate, the temperature is stable, and the constant temperature and humidity effect is good.

Multiple defrost functions:
． Use electric heating wires with long life, high temperature resistance, and high insulation level
,
and are equipped with water sinks.
． You can also choose a safer and energy-saving hot fluorine flushing method.

A clean system extends the service life of the compressor: the inside of the tube is specially treated to ensure that the inside of the aluminum row is clean. Made of aluminum alloy with strong anti-corrosion capabilities, the surface has been treated with a special process to ensure a long service life and comply with food hygiene standards.

Calculation of the aluminum exhaust pipe area and its ratio with the compressor
． Calculation of evaporation area: multiply the total length of the fin tube by the outer perimeter of the fin tube.
The outer circumference of the fin tube is
b .m
m
, and the evaporation area

㎡
The fin tube The outer perimeter is
b . m
m
, and the evaporation area

㎡
. The ratio of aluminum row to compressor:
The heat exchange capacity between the fin tube and the air
The value is about
-/
℃ can also be calculated using a simple method. When the cold storage When the storage temperature is set at
℃, the displacement of the semi-hermetic compressor can be multiplied by the coefficient
The resulting number is the square meter of evaporation area that should be equipped with an aluminum row, such as
When the exhaust volume of the medium and low temperature compressor is
With this ratio, the difference between the evaporation temperature and the temperature inside the warehouse is about
℃
,
The energy saving effect is quite ideal. When the evaporation area is configured to be small, the temperature difference will increase, the cooling capacity of the compressor will decrease, and the power consumption will increase.
The ratio of commonly used semi-hermetic compressors to aluminum exhaust
b: : . :. : . ..b: b:. . . Bitzer
Copeland
Compressor model
..b: b:. . . Compressor displacement

..b: b:. . . br ℃
℃
Cold storage aluminum row
Area (㎡)
..b: b:. . . b ℃
℃
Cold storage aluminum row
Area (㎡)
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