Gli ormai consolidati compressori a pistone sono utilizzabili da oggi in modo ancora più versatile

• Efficienza energetica migliorata
• Potenza frigorifera incrementata
• Limiti di impiego ampliati

Sindelfingen, 27.03.2012. In occasione della Mostra Convegno Expocomfort di Milano, BITZER presenta per la prima volta la serie ampliata di compressori a pistone BITZER ECOLINE. I compressori sono oggi utilizzabili in modo ancora più versatile e, oltre al R134a, sono disponibili per molti altri refrigeranti, per esempio per R404A, R407A, R407C, R407F e R507A. Con la nuova serie, BITZER è riuscita a rendere accessibili tutti i vantaggi dell’ormai consolidata serie BITZER ECOLINE per il refrigerante R134a a uno spettro ancora più ampio di applicazioni e a offrire ai clienti un valore aggiunto d’importanza decisiva. 

L’ampliata serie BITZER ECOLINE vi attende con numerosi vantaggi in termini di efficienza e di prodotto: da subito i compressori forniscono, nella refrigerazione a temperature normali, una potenza frigorifera superiore fino al 6% e, nella refrigerazione a basse temperature, i compressori conquistano con incrementi ancora maggiori. Al contempo gli ingegneri BITZER sono riusciti ad aumentare il coefficiente di effetto utile (COP) della nuova gamma a temperature di condensazione inferiori e superiori fino al 12%. Tutti i compressori si contraddistinguono per limiti di impiego veramente ampi, con impiego di refrigerante R404A e versione del motore 2 (raffreddamento a temperature normali e basse), per esempio fino a una temperatura di condensazione di +60°C e una temperatura di evaporazione di 0°C.
Un’ulteriore caratteristica è l’ottima idoneità della nuova serie ECOLINE alla regolazione di velocità, assai vantaggiosa per l’efficienza del sistema, mediante convertitore di frequenza. A prescindere da questo, tutti i modelli a 4 e 6 cilindri possono essere equipaggiati con una regolazione di capacità da gestire in modo molto economico attraverso l’esclusione dei cilindri. 
Grazie a questi accorgimenti, BITZER fa fronte sin d’oggi alle esigenze, prevedibilmente in crescita, in termini di consumo energetico e soddisfa il desiderio della clientela di una serie utilizzabile in modo estremamente flessibile.

Molteplici possibilità applicative su una piattaforma sperimentata
Grazie alla possibilità di impiego di molti dei refrigeranti in commercio, i compressori consentono un ampio spettro di applicazioni, e BITZER offre così ai clienti un grande valore aggiunto. I compressori BITZER ECOLINE vengono utilizzati, tra l’altro, nella refrigerazione a temperature basse e normali nei supermercati, nei magazzini di generi alimentari, nelle unità condensatrici o nell’industria chimica, ma anche nelle cucine industriali, nell’industria farmaceutica nonché nelle pompe di calore ad alte temperature. Tutti i compressori della nuova gamma si basano sui compressori a pistone semiermetici di successo BITZER di seconda generazione, che da anni sono sinonimo di qualità, alta efficienza e affidabilità. Per la gamma ora rivisitata, BITZER ha messo a disposizione il know-how collaudato della serie di successo ECOLINE per R134a, ottimizzandola anche per l’impiego con altri refrigeranti. Ciò che è rimasto uguale è la consolidata piattaforma del compressore. In questo modo la serie rivisitata BITZER ECOLINE sostituisce integralmente la serie precedente. Immutati rimangono anche le posizioni di montaggio, gli attacchi della linea di aspirazione e scarico nonché, in quasi tutti i casi, la posizione della valvola di scarico e gli ingombri di montaggio della nuova serie rispetto a quella standard, il che garantisce una intercambiabilità illimitata.

Oltre ai compressori rivisitati della serie ECOLINE e ai compressori scroll di nuova concezione ORBIT 6, BITZER presenterà un’ulteriore novità mondiale allo stand BITZER H29 K30.

BITZER Kühlmaschinenbau GmbH celebrated its 75th anniversary with customers, suppliers, journalists, and employees. Since its foundation, the Sindelfingen based company has developed into a worldwide leading manufacturer of compressors, condensers and pressure vessels for the refrigeration and air conditioning industry. The Management Board took a positive stock of the past decades and had an optimistic view for the future despite the current economic crisis.

BITZER Kühlmaschinenbau GmbH was founded as "Apparatebau für Kältetechnik" ("Apparatus Engineering for Refrigeration Technology") by Martin BITZER in 1934, and proudly looks back on 75 years of company history. Besides employees and journalists, also customers and suppliers from all over the world have been invited to the ceremony taking place on 4th of December. More than 300 guests celebrated the memorable jubilee together with Chief Executive Officer (CEO) Peter Schaufler, Senator h. c. Large screens in the „SCHAUWERK Sindelfingen", the former production site of BITZER reciprocating and screw compressors, guided the participants through history: They displayed BITZER manufacturing plants as well as products from the past and the present and brought the past and the future of the company to life. "SCHAUWERK Sindelfingen" is the name of the new museum, where art lover Peter Schaufler will open his collection of contemporary art pieces to the public in June 2010.

Peter Schaufler took over BITZER in 1979 – since then the company has grown continuously and achieved mostly two-digit growth rates. Since October 2008, however, even at BITZER the effects of the economic crisis are noticeable. "The economic and financial crisis has certainly affected our business as well", said Peter Schaufler. "But despite the decline in order income from October to December 2008, the last year was the second best in company history." Since July 2009, the order situation has stabilized – CEO Peter Schaufler anticipates a sales decline of only twenty percent for the running business year versus the previous year. He counts on a recovery next year: "Based on the results of 2009, we expect a growth rate of around ten percent in 2010. Due to cost cutting measures that have already put into effect, BITZER will not have any enforced redundancies in 2010".

The optimism has several reasons: Meanwhile the positive signals from the refrigeration and air conditioning industry are increasing.

And BITZER is back on track for growth again. "Amongst other things, this is due to our strong innovations as well as our ability to recognize and meet the requirements of the market," explained Peter Schaufler. An example, he said, is the development and production of extremely energy efficient screw compressors as well as the usage of natural and environmental friendly refrigerants. "In the future we will keep offering our customers individual solutions and strengthen our market leadership," said Peter Schaufler.

The new optional protection devices SE-C1 and SE-C2 for screw compressors have extended monitoring functions and protect the compressor far beyond the general control functions. In addition to motor and discharge gas temperature, rotation direction and phase failure, the devices also monitor phase asymmetry, switching frequency and oil supply. The status is shown on a code display with up to 29 different operating and fault messages thus facilitating a quick analysis of the compressor status. Furthermore, the devices allow a simplified structure of the safety chain providing additional economic benefit.

The protection devices can be used for voltages from 24..230 V AC +10 %/-15 % 50 Hz and 60 Hz and are suitable for operation with frequency inverters. SE-C1 has been designed for compact screw compressors of the CSH and CSW series and for semi-hermetic screw compressors of the HS.64 and HS.74 series. SE-C2 can be used for semi-hermetic screw compressors of the HS.85 series. The devices are available since beginning of 2009.

SE-C1 monitors:

• CSH and CSW series: motor and oil temperature
• HS.64 and HS.74 series: motor and discharge gas temperature
• PTC measuring circuit
• Wrong rotation direction, phase failure and phase asymmetry (voltage interruption)
• Maximum switching frequency
• Oil level (only CSH and CSW compressors)
• Oil flow (only HS.64 and HS.74)

SE-C2 monitors:

• HS.85 series: motor and discharge gas temperature
• PTC measuring circuit
• Wrong rotation direction, phase failure and phase asymmetry (voltage interruption)
• Maximum switching frequency
• Oil supply
• Oil stop valve

Please refer to the Technical Information ST-121-2 for further details.

Alexander C. Pachai, Business Development Manager at Johnson Controls Inc. in Denmark, took part in the BITZER European Refrigeration seminar held from February 11th – 13th. In his daily work he is focused on the use of natural refrigerants. In this interview he speaks about his motivation to attend the BITZER seminar in Sindelfingen, Germany.

You have been Business Development Manager at Johnson Controls Inc. in Denmark now since April 2000. What is your daily work all about?

Alexander C. Pachai: I’m focused on the use of natural refrigerants, mainly CO2 and Hydrocarbons as well as Ammonia. On top of that I’m also heavily involved in exploring how to get over R22. This is an enormous task for the manufacturers! At the moment I can’t imagine that we will be able to make it in the required time. In my opinion many companies still have not realized in time that they have to find an alternative for R22.

How many times have you taken part in the BITZER seminars during your work for Johnson Controls?

Alexander C. Pachai: I have been to Sindelfingen twice for a seminar: Last year I took part in the CO2 seminar as well.

Why did you come here this year for the similar CO2 seminar again?

Alexander C. Pachai: Because there is always something new to learn! BITZER introduces new contents and information in the seminar all the time as well as new techniques of presentation. And another main important reason is the communication with colleagues from all over Europe of course.

What was the biggest benefit you got from the seminar?

Alexander C. Pachai: Each seminar broadens my horizon for my daily work. I can use the knowledge and learn more about how to use natural refrigerants. Besides that I’m writing a reference book. This is a private project and I learned a lot about how to present complex information in a way people understand.

Would you recommend the BITZER seminars?

Alexander C. Pachai: Of course! It’s a good way to get new and serious knowledge about the use of natural refrigerants, chillers working with hydrocarbon, PED approved regulation and so on. Right now is just the perfect moment to get more knowledge about all this.

You said, industry has to get over R22. What do you think: Which refrigerant will be used in the future?

Alexander C. Pachai: That’s really difficult to say! If I look ten years ahead I think the number of synthetic refrigerants will be limited. One reason is the discussion about our climate. It’s an easy way for politicians to say ‘away with the synthetics’. On the other hand even the manufacturers think that synthetic refrigerants will disappear more and more. But it’s really difficult to predict the future. We will see what happens.