Industrial Refrigeration
21Pages

Industrial refrigeration leadership with passion leadership with passion

Industrial refrigeration Fresh fruit and vegetable storage Meat cold room Logistic hubs leadership with passion

Industrial refrigeration Refrigeration is the technique which allows mankind to store food products and easily retrieve them in times and places that are different to the ones in which they were harvested and processed. There are very many different fields in which the techniques of refrigeration can be applied. The choice of equipment type, the way it distributes the refrigeration, the quantities of air necessary for properly storing the goods, can all prove to be vastly different depending on the different operating conditions. A careful analysis of the various parameters has to be...

Cold room: dimensions, goods loading procedures and storage duration Refrigeration includes goods storage types that are very different to each other. They vary from smalland medium-sized cold rooms to very large refrigerated warehouses (typical of the logistic hubs of large distribution chains) which can be even more than 100m long. In addition, there may be a rapid turnover of goods in cold rooms or the goods may be stored there for many months, up to almost a year for fruit storage in a controlled atmosphere. LU-VE uses a sophisticated CFD software simulation system in order to estimate...

Environmental conditions: material resistance Some storage processes (e.g. cheese maturing, leather storage etc) generate substances that attack the materials traditionally used to make standard products (copper tubes, aluminium fins, zincplated casings). In other cases it is the periodical sanitisation process of the storage area and the air cooler that can prove to be aggressive. In these circumstances special equipment is available that has the following characteristics: Coated aluminium fins (Alupaint®) Copper fins Stainless steel tubes Heat exchangers painted using various protective...

CHS - Compact Hitec Surface Turbofin® 3 Fins The heat exchanger CHS, with staggered rows, equipped with the new Turbofin® 3 fin, is characterised by an optimal ratio between secondary fin surface and primary surface of the tubes ensuring very high unitary capacities. The elevated thickness aluminium fins have an optimised configuration for industrial refrigeration applications. The CHS unit coolers find the best application in both high and low temperature applications for the conservation of products with low humidity content or packed products that accept an even higher difference between...

COOLING PHASE DEFROSTING PHASE In low temperature storage cold rooms, defrosting efficiency becomes very important in order to avoid introducing heat to the cold room which will then have to be removed again by the refrigerating system. Furthermore, the loss of vapour from the equipment also leads to a dangerous formation of condensation and therefore to ice formation on the cold room roof and floor. Solutions are available for reducing these problems by closing the discharge fan outlet and the air intake side by means of air director cover or motorised shutters (available for temperatures...

Fresh fruit and vegetable storage This is a very special field in which very delicate living products are processed, which have to be stored sometimes even for many months. Since the main objective of an air cooler is to minimise any product weight loss due to product dehydration, then it is fundamental to operate with very low temperature differences between air and refrigerating liquid. If we are considering cold storage rooms for very long periods in a controlled atmosphere with reduced oxygen (O2) percentage levels in the air, then it can be particularly advantageous to use blower fan...

STORAGE PROCEDURES FOR DIFFERENT TYPES OF FRUIT AND VEGETABLES Fresh product conservation temperature Freezing temperature Frozen product conservation temperature Fresh product conservation relative humidity % Dates (dried) Lemons Tangerines Apples Melons Raspberries Limes Beans (fresh) Beans (dried) Peas (fresh) Peas (dried) Tomatoes (green)

To allow, therefore, more favourable air circulation within the cold room and more free space dedicated to the goods, LU-VE has developed an innovative product called “Value Defender” with an inclined fan. This solution should be used when the refrigerating liquid is single-phase (glycol-water or similar) which is a very frequent condition in this field. It allows the temperature difference between the air and the tube liquid to be reduced to a few degrees. The “Value Defender” range is available in a number of possible configurations, see table below (rough guide): VALUE DEFENDER air...

Cubic blower fan configuration A cubic blower machine configuration is also available and is advised for direct expansion HFC refrigerant applications. PDF range Another possible product configuration is the PDF range which has a horizontal heat exchanger and is recommended for cases in which a space is available for installing the air cooler. In this way one obtains a type of technical room in which it is easy to access the machinery and at the same time the available volume for storing goods in the cold room is increased. Possible layout for a PDF model (fresh fruit storage) Performance...

Meat cold rooms There are two main types of cold room: - product cold storage rooms - product processing cold rooms (with a varying number of operators present). Some indicative meat storage cold room parameters: Suggested values for generic cold store Cold storage room type Cold storage room (multipurpose use) Arrival cold store Fast cooling for pork Fast cooling for beef Sausage meat Cooling down “wet” (sausage) Cooling down “dry” (sausage) Pickle room Slaughterhouse waste

Some indicative meat processing cold room parameters RT [°C] Workroom, normal for several uses Workroom, advanced for several uses Cooling down “wet” (sausage) Pickle room Workroom type These are cold rooms in which defrosting is not envisaged although, on the other hand, low air speed and limited noise levels are important in order to safeguard operator health. Double flow category equipment is often used and is available either in the normal or silent version (CDH range). There is also a special variant in which the fan is located on top of the unit. Here the air speed perceived by...