The Adamas company develops and manufactures film evaporators and refrigeration units for the food industry, including the oil and fat industry. Our company produces flooded film evaporators and direct expansion evaporators. Any freons (B507, H404A, I22, etc.) can be used as a refrigerant. The flow path of the film evaporator is made entirely of stainless steel, which provides it with corrosion resistance and a long service life. The cooling capacity of the evaporators is from 1 to 5000 kW, depending on the needs of the Customer.
Cooling a large amount of food liquids requires the use of an intermediate refrigerant that has a number of necessary properties. The coolant must be non-toxic, inexpensive, have acceptable heat transfer properties, low viscosity, be non-volatile, non-corrosive, etc.
Ice water is the ideal coolant – it is most commonly used in the dairy and food industries.
Its temperature should be as low as possible, close to the freezing point. However, from a technical point of view, obtaining ice water with a temperature of 0.5 ° C is a difficult task.
The widely used flow-through hermetic shell-and-tube and plate heat exchangers for the production of ice water are of limited use. This is due to the danger of destruction when negative boiling points are reached and ice water freezes inside the heat exchanger circuit. Therefore, open heat exchangers are widely used in the production of ice water.
Film evaporators are panel evaporators, in which the cooling of ice water to temperatures close to zero is achieved during the flow of a thin layer of ice water over the surface of the evaporator. Water is supplied to the distribution tank: located above the film evaporator bank. From the distribution tank, water is evenly supplied to the vertically positioned panels.
A thin layer of water flowing down the surface of the panel forms a water film and is intensively cooled during eum. The cooled water flows into the storage tank for subsequent supply to consumers. The temperature of ice water at the exit from the film evaporator ranges from 0.5 to 2 ° C.
Most commonly, film evaporators are used in systems with constant load during the entire equipment life cycle.
Ice water cooling systems using film type evaporators have many advantages. Firstly, these are high heat transfer coefficients (up to 2000 W / m2K).
Secondly, in such systems it is possible to cool ice water to a temperature close to the freezing point (0.5 ° C) without the danger of defrosting the heat exchanger and without the need to install additional expensive protection devices.
Even if under extremely uneven heat loads the evaporators freeze up and become covered with an ice crust, then there is no danger of destruction of the evaporators, since the liquid freezes in an open space (not inside a sealed heat exchanger).
Film evaporators are very easy to clean. To do this, open the side cover of the evaporator housing. Visual inspection and cleaning can be performed even while the unit is in operation. The film evaporator can also work with partially clogged ice water, which is especially important when cooling dough, sausages, vegetables and fruits.