stefani-spa-company-profile
32Pages

New Stefani: Designed for the best.

Great products for great customers.

Performance With the design of the new range of products, Stefani have reviewed their heat exchangers to obtain the highest thermodynamic performance. The geometries of the finned packs, the technology of the tubes and fins, the optimized ventilation: everything contributes to an exchange at the highest levels. The specific performances in kW/lt and kW/Watt are at the peak of the market offer. Stefani’s results are obtained thanks to collaboration with prestigious companies, such as Wieland, Ziehl-Abegg and EBM-Papst, which test the components in their research centres, and with the...

the countries to which we export 18.950 9.000 the items despatched in one year the square metres of production site the years of guarantee of our products the exchange geometry configurations

We know your needs. Commercial refrigeration In preservation there are packed products, frozen products and fresh products that breathe. There is a significant difference in their needs. For fresh products we adopt solutions that maintain the organoleptic qualities of the breathing product unchanged over time: temperature, humidity and an adequate number of recycles in the cold rooms. Another aspect in which we are proactive is the adoption of technological solutions using natural refrigerants such as CO2 and glycol. Anyway, the greatest attention to energy saving.

Industrial refrigeration: processing rooms Industrial refrigeration: blast chillers In these applications, product refrigeration requires very varied solutions, depending on the specific need of the process. Some require significant drying in the time unit, others the guarantee of less weight loss of the stored product. The cold could also require alternate cycles or air circulation adequate for the presence of personnel or of the treated product. The process requirements for maturing, drying or smoking rooms, for cleanrooms or for processing rooms, differ a great deal in terms of material...

Directly linked to the presence of large retail chains, refrigerated logistic centres are becoming more and more common. We are talking about normally large areas where goods transit for medium-short periods, whether they are fresh or frozen products. They are normally very large cold stores that require air distribution with adequate air throw. In conditioning applications, such as HVAC for large buildings, let us now consider the different aspects linked to heat dissipation: › ability to guarantee heat exchange performances with low energy consumption and noise emission; › environmental...

Process cooling Process cooling may be of various types: industrial water cooling applications such as the cooling of moulds or electric panels, radiators for large motors or generating sets, cooling of auxiliaries such as pumps in oil&gas applications. We make customized finned packs for batch production, for our customers’ machines. In all cases we guarantee strong, reliable solutions that are easy to maintain. In particular for the following sectors: › data centres; › industrial air conditioning; › commercial air conditioning; › condensing units for refrigeration; › air treatment units...

Fabio Zoggia, Commercial Director 10

High-efficiency heat exchangers allow The system running costs dehumidification to be reduced by can vary up to The noise level during operation can vary by Capacity for specific footprint kW/m² can be increased by

High-efficiency heat exchangers, with tube and fin geometry for high performances, allow system running costs to be reduced by 90% 80% 70% To maintain the same refrigeration capacity with the system, the variations in [kW DT1–8°C] performance due to the choice of the coil configuration of the heat exchangers 110% are transformed into variations of ΔT. For example, a variation in performance of +25% on the evaporator side and +10% on the condenser side would result 100% in a variation of consumption in the compressor of -8.5% with respect to what would theoretically be indicated by Carnot’s...

Depending on the working conditions, the same air cooler can vary its dehumidification capability up to [Ontvochtiging] [Ontvochtiging] [Ontvochtiging] 5 6 7 5 6 7 [Ruimte tussen lamellen] [Ruimte tussen lamellen] In the food cooling and preservation process, one of the parameters to be considered in designing heat exchangers is linked to drying. In an evaporator, this parameter is especially linked to the temperature differential between the cooling fluid and the cold store temperature and to the characteristics of the machines, such as the secondary exchange surface. The graphs below...

In residential applications, the use of electronic motors allows the reduction of noise levels between day and night operation by If we compare a condenser with AC motors with the same machine equipped with EC motors, the electric absorption already shows an advantage in standard working conditions (6poles ~ 950rpm) and has significant reductions of noise and consumption in silent operating mode (450rpm). [Prestatie Index] If we take a condenser in catalogue conditions as reference, we find that the adoption of EC motors allows the reduction of consumption and particularly of the noise...

Source: article “Cold store maintenance” published by Centro Studi Galileo Values suggested for the preservation of fruit and vegetables in different cold stores: R.H.% = relative humidity r.o.v. = relating to origin and variety PRODUCTS NOT SENSITIVE OR SLIGHTLY SENSITIVE TO COLD Fruit Apricots Oranges (r.o.v.) Cherries Fresh dates Strawberries Kiwis Raspberries Lemons Apples (r.o.v.) Coconuts Pears (r.o.v.) Peaches Plums Grapes (r.o.v.) Vegetables Garlic Asparagus Artichokes Carrots without leaves Cauliflowers Cabbages Brussels sprouts Dried onions Mushrooms Lettuces Sweetcorn Potatoes...

In the productive heart of heat transfer technology