Fermatic 3430 Track from FERMOD

Modern door construction techniques, coupled with improved thermal insulation materials are permitting manufactures to produce cost effective insulated door systems. Market leaders Fermod are assisting in this development by introducing the new Fermatic 3430 series track. Developed to carry doors up to 150kg in weight, it visually compliments the benchmark 3530 series track and will sit comfortably along side it.

The newly designed brackets provide a minimum overlap on the top of the door allowing for those tight header situations.

Pleasing in appearance all mobile components are situated within and protected by the outer zinc-bichromated steel rail. Its symmetrical design acts as a hygienic cover, which conceals the silent and smooth fixed bearing system. The smooth and trouble free door operation is completed by the proven robust floor guide system taken from the 3530 series track. The supple 8511frame gasket generates complete door sealing which helps to significantly reduce the risk of icing.

During 2010, Fermod introduced the now successful Fermatic 2100 range of tracks to cover doors 60kg, 80kg and 120kg in weight. Combining the correct Fermatic track with the appropriate door makes sound economic sense, costs are controlled and quality is maintained

Fermod’s now familiar trademark of a smooth and silent door operation is maintained on all three models via the strengthened dual roller mechanism, which is concealed within the easy to mount anodised aluminium rail. The built in anti-derailment system ensures trouble free operation and maximises personnel protection.

The new generation of Fermatic door tacks now makes it possible to reduce manufacturing costs while still retaining the high operational quality associated with the high performance Fermod products. Combining the correct Fermatic track with the appropriate door makes sound economic sense, costs are controlled and quality is maintained.

The table below indicates the Fermatic track most suitable for each application.

Maximum door weight

Model

60kg

Fermatic 2120

80kg

Fermatic 2130

120kg

Fermatic 2150

150kg

Fermatic 3430

200kg

Fermatic 3530

Like all manual Fermatic tracks the 2100, 3400 and 3500 series are suitable for automation by fitting either the auto mechanical or electronic conversion kit. Conversion is quick and easy without need for further modification.

The investment into research and development really does keep Fermod at the forefront in product design, giving manufactures a true choice of track to suit both site requirements and door design

Please contact Fermod for further information on any of the products in this article.

Fermod Limited

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PXV valve forms the heart of the Eliwell all-in-one system

By combining the new PXV electronic expansion valve, the V800 electronic expansion valve driver and the ID985/V electronic controller, Eliwell offers a modular solution for the creation of a comprehensive and high-efficiency system

The use of electronic expansion valves (EEV) in commercial and industrial refrigeration has paved the way to high-precision, stable and reliable control of refrigerant flow, resulting in increased system efficiency. Electronic expansion valves are controlled by a driver which regulates their opening, based on the level of performance required by the system and in response to all operating conditions. They ensure minimal overheating in the long term, which optimises the performance of the compressor unit and increases the benefits of floating condensation. Eliwell offers a comprehensive and flexible solution consisting of three components: the PXV electronic expansion valve, the V800 electronic expansion valve driver and the ID985/V electronic controller.

A winning combination for substantial energy savings
The synergy between the three components that make up the Eliwell system produces a substantial energy saving, which the company has measured in sales outlets at up to 25%. The enclosed chart illustrates the total power consumption, over a 24-hour period, of a supermarket* before and after installation of the V800 Electronic Expansion Valve Control System combined with the EWCM compressor rack controller. The green area indicates the 25% energy saving achieved using floating condensation.
The V800 driver is specifically devised to generate maximum energy savings and streamline the performance of retail refrigeration units. Furthermore it integrates with the ID985/V compact electronic controller, optimised for use in supermarket refrigeration systems, which assures the high-quality, safe storage of fresh and frozen food. This combined system keeps the refrigeration plant running at full efficiency, while at the same time helping to save power.

PXV, the heart of the compact solution
The new PXV solenoid expansion valve regulates the flow of refrigerant to the evaporator by modulating the opening time of its own obturator, allowing a wide range of power variation. Extremely precise and reliable control of refrigerant flow increases the efficiency of the entire system. Nine interchangeable orifices are available, with power ratings from 1 kW to 24 kW. This valve should be coupled to a coil controlled by a V800 electronic regulation device.

*Data source: Fieuw koeltechniek

Further savings on system installation and activation times

Being extremely simple to set up and start, the Eliwell all-in-one system reduces installation and maintenance times:
• Simplified configuration of the V800 driver by selecting the type of application, making optimal control possible at all times without the need for future adjustments or calibration
• Compatibility with the new Device Manager software for quick parameter programming; this software is also designed to monitor and record the system variables in real time, simplifying the set-up of the system
• Quick configuration via dip-switches and LED display. Alternatively, an IWK/V terminal can be connected to obtain a complete user interface.
• Possibility to connect the Eliwell USB copy card on the front panel for quick device set-up

EEV control system features at a glance Compatibility with the main components available on the market • Flexibility for different application requirements • Customisable refrigerants table • Availability of a start-up kit for easy activation of the installation • Configuration of Software Device Manager for parameter set-up, real-time view and recording of operating data

The post שסתומים אלקטרוניים Castel עם בקרה אלקטרונית Eliwell appeared first on אור שי.

מאז הקמתה בשנת 1961 Castel נמצאת במרכזה של רשת עסקית עם בסיס איתן המציעה ללקוחות ולספקים כאחד וודאות מתמשכת. הגודל הבינוני מייצג יתרונות ביעילות ומהירות עם מערכת מאורגנת אשר יכולה לקבל החלטות ומענה מהיר לכל בקשה.

היכולת של החברה לעמוד בקצב של השינויים העולמיים מתבטא בעבודת המחקר העשירה והמגוונת.

תהליכי העבודה והפיתוח של מוצרים ליישומים מדויקים בטכנולוגיות מתקדמות מתאימים לראיית העולם הפתוחה והעקבית של קסטל מאז ועד היום.

בזכות נוכחותה הבינלאומית ברחבי העולם החברה מקיימת קשרי עבודה פוריים ומגוונים עם חברות נוספות בענף, דבר התורם לפיתוח פתרונות ומענה לבקשות המגוונות לרווחת הלקוחות.

במשך שנים רבות Castel מפתחת מוצרים מתקדמים לתעשיות מיזוג האוויר, הקירור והתעשייה.

השנה קסטל הוסיפה עוד שני פיתוחים חשובים למגוון:

הראשון – פיתוח וגיוון סדרת קו הייצור של ברזים חשמליים מבוססי בוכנה. סדרת הברזים החדשה אמורה להחליף את הסדרה הסטנדרטית ומציעה מענה הולם יציב ועדכני המותאם ליישומים השונים המתבקשים מהשטח. הברזים החדשים עמידים בהרבה מברזי הדיאפרגמה הישנים ומציעים אטימות מושלמת עם עבודה בטווח טמפרטורה גבוה בהרבה ללא כל תקלה או סכנה.

•

בסדרה החדשה יכללו גם דגמי הברזים הבאים:

2M/1078 1078/13 ו-1079/17 עם KV Factor של 25 מטר קוב לשעה עם חיבורי 42 מ"מ ,1-5/8 ו-54 מ"מ.

הפיתוח השני הינו סדרת ברזי ביטחון חדשה מדגם 3070 המבוססת על מנגנון דסקית מתפרצת.

בשנת 2012 החברה תמשיך להוסיף מוצרים חדשים לתחום שיוצגו בתערוכת הקירור והמיזוג EXPOCOMFORT 2012 בחודש מרץ במילאנו איטליה.

קסטל גם תציג את המוצרים החדשים בתערוכת הקירור והמיזוג בבייג'ין בתאריכים 11-13 באפריל, כמו כן ב CHILLVENTA בנירנברג בתאריכים 9-11 אוקטובר בחודש מרץ במילאנו איטליה.

חברת קסטל מודה בזאת לכל מי שליווה אותה לאורך הדרך עד ליום הולדתה ה-50.

יום הולדת שמח Castel.

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Localised and deep cleaning operations are performed easily and effectively with Fermostock anodised aluminium frame and removable dishwasher safe polymer cassettes.

The common problem of space allocation is easily overcome through the unique flexible design capabilities found in all the Fermostock range. Our layout and costing service are available to assist you in selecting the most efficient solution for the space available.

Fermostock 5611 is delivered flat packed; a single person easily carries out this tool free, quick and efficient installation.

Our free calculation and layout service ensures that space is fully utilised, single units can be linked together to form extended runs and open access corners.

Whether it is cold room, dry goods, crockery or laundry storage, Fermostock 5611 is the answer.

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Energy saving potential in the AC&R systems
In a AC&R circuit we can find many parts that need energy to perform their function, ensuring the effectiveness of the refrigerating cycle. The main components are the compressor, in addition to which we find the fans on the heat exchangers, guaranteeing the heat exchange with the air, or pumps, doing it with other heat transporting media. It is a paradox, but the compressor is the last component that started his efficiency optimizing process, even though it is the most energy consuming.

Apart from the introduction of new refrigerants with lower GWP, nowadays the reduction of the CO2-Emissions (and therefore of the energy consumption) is the mandatory issue of refrigeration systems. As the systems are, during the year, mostly working in part load condition, the research and development is since ever strongly committed to seek for the highest possible efficiency exactly in this condition. The new compressor generations are therefore designed for higher part load efficiency, and not for the highest output at 100% condition. Although this aspect is not neglected, it stays now only on the second position of the design priority list.

Up to today the main goal was the simple regulation of the system capacity, without considering the real efficiency of the system at those conditions. Nowadays, due to the mentality change inducted by high energy costs, the main target is to maintain the highest possible degree of efficiency at given capacity needs. The calculation methods have changed. Earlier the compressors were calculated for condensing temperatures of +30-+40°C. Nowadays the technicians try to optimize further their systems running them down to condensing temperatures of +25°C, maybe even +20°C. With such a small pressure differential the design of a compressor, especially of the compact screw compressor type, is of extreme importance. A lower condensing temperature means a higher capacity output, so that the capacity regulation, at the end, has to be proportionally bigger than before. At the very end of the thing, what really matters, what really influences the consumption of a compressor, is the amount of work we have to put in to overcome the pressure differential between suction and discharge pressure. The optimisation of the efficiency is only a function of how much I optimize my electrical and mechanical losses. The first are influenced by the type of motor and the electric network, the others are influenced by the internal fluid-dynamical conditions and mechanization / assembly of the compressor parts.

The state of the art
As we have seen before, the rationalization of the compressors' energy consumption is the matter with the highest saving potential in a refrigeration system. Until few time ago the only way to capacity regulate a screw compressor was normally through a slide valve system. And here we are immediately hitting on the first cause of reduced efficiency. As we know, every screw compressor is designed with a built in volumetric ratio, that is normally optimized on nominal conditions (considered to be the extreme ones) and at full load. As we can see in table 1, the full load operation condition, according to ASHRAE ESEER calculation method, influences the efficiency only with a factor of 0,03. This means that the calculation assumes that only for 3%

of the operation time the compressor is working at his full load condition. If on top of that we consider that only a small part of this 3% will be performed at design temperatures, than we get a felling for how much time in a year this machine will work at it's best efficiency. It's really only a very small fraction of time.

As a matter of fact, the “built in volumetric ratio” is a parameter that tends to be only theoretical. Whenever the screw compressor starts to regulate this value is anyway lost,

due to the movement of the slide valve itself. As you can see in figure 1, the so called Vi (intrinsic volumetric ratio) is a function of the geometrical volume at the discharge port. The smaller the volume, the higher the Vi, and therefore the pressure difference between suction and discharge. Whenever the slide valve starts regulating the cooling capacity, this geometry is lost, and therefore the residual efficiency, too. This is one of the causes for the efficiency drop at partial loads in screw compressors with slide valve control. At this losses you have also to add the ones due to electrical inefficiency and mechanical resistances, to have, as a result, the total loss of efficiency. This argument may seem of secondary importance, but the reality shows us how much influence this parameter has. Laboratory tests are giving a clear picture of how much energy gets lost due to an inappropriate Vi value.

The above graphic is considering a standard compact screw compressor, witch’s Vi is fixed at the production stage. The evaporation temperature is always +2°C, so we could imagine this is related to an air cooled water chiller, as it is used in the most AC applications. In this conditions the normal condensing temperature, considered in the mid- southern European Continent is +50°C. This graph, result of laboratory and extensive field tests, is showing following:

The standard calculation conditions are giving a working point @ +2/+50°C. Therefore the optimized Vi result in the value of 3,2. As we can recognize in the graph, @+50°C condensing temperature the Vi=3,2 the graph curve is very near to it's maximum.
If this compressor, optimized for the theoretical working point, works at a different condensing temperature, let's say at +40°C, the efficiency difference, compared to the optimal Vi (2,6), is about 5% in efficiency. If you consider a condensing temperature of +30°C, the difference compared to the optimal Vi (2,2) is about 12% in efficiency.
The same happens, in case of a heat pump, when you have to condense @ +65°C. The efficiency difference is about 5%.
The conclusion is, that in every days operation, the unit, calculated for the nominal working point, is operating at approximately 8-10% less than it's full efficiency potential. An integrated Vi control is something that could save just 10% of energy, with a minimum of investment. As we know, the easiest earned Euro is the saved one.

The second big issue in increasing the efficiency of compressors is the termination of the electrical inefficiencies. This, as know, can be done with the use of a frequency control, that is varying the rotation speed of the screws, in order to recover at least the energy waste, due to mechanical and electrical losses. A regulation throughout a classical slide valve control allows a good control of the cooling capacity (output), but the power consumption (input) still stays disproportionally over the output. If you cut down to 40% (so -60%) of the cooling capacity, the absorbed capacity in a standard compressor is not decreasing with the same value, but it drops only by 44%, so that the efficiency drops by overall more than 25%.

This phenomena can be easily solved by the use of a VFD (variable frequency drive). This kind of system can operate as a separate system to the compressor, although there are compressors nowadays, that have an integrated VFD. Variable frequency drive controllers are solid state electonic power conversion devices. The usual design first converts AC input power to DC intermediate power using a rectifier or converter bridge. The rectifier is usually a three-phase, full-wave-diode bridge. The DC intermediate power is then converted to quasi-sinusoidal AC power using an inverter switching circuit. The inverter circuit is probably the most important section of the VFD, changing DC energy into three channels of AC energy that can be used by an AC motor. These units provide improved power factor, less harmonic distortion, and low sensitivity to the incoming phase sequencing than older phase controlled converter VFD's.

The advantage of using such a frequency controlled compressor is mainly the proportional cut of cooling and absorbed capacity (what I am not getting as output I am not consuming in input), and in case of integrated VFD compressors, also a higher motor efficiency, with cosφ of approximately 0,99. As you can see in the above graphic, @50% of the capacity the advantage, in terms of efficiency, is about 20%.

The state of the art is therefore a compressor that is integrating a frequency control and a Vi control to. These compressors have been already designed and are in series production, integrating both of the systems, in order to have a fully integrated product, purchasable as a single item, including screw compressor, oil separator, frequency drive and Vi control in one.

Advantages of the integrated Vi controlled VFD-Screw Compressor

The first, and most interesting advantage, is the power saving. As you can read in table no. 2, the efficiency difference of a standard compressor, compared to a last generation compressor, is about 26%. This result is achieved considering the same working method all over the year. Integrating a sliding condensing and evaporation temperature control system, can easily raise this saving up to 50% of the electrical consumption considered as normal until the day before yesterday. But these figures are only considering the operational lifetime of the compressor. A lot ore of consumption happens not during operation, but during the start-up of the compressor.

When a VFD starts a motor, it initially applies a low frequency and voltage to the motor. The starting frequency is typically 2 Hz or less. Thus starting at such a low frequency avoids the high inrush current that occurs when a motor is started by simply applying the utility (mains) voltage by turning on a switch. After the start of the VFD, the applied frequency and voltage are increased at a controlled rate or ramped up to accelerate the load without drawing excessive current. This starting method typically allows a motor to develop 150% of its rated torque while the VFD is drawing less than 50% of its rated current from the mains in the low speed range. A VFD can be adjusted to produce a steady 150% starting torque from standstill right up to full speed. Note, however, that cooling of the motor is usually not good in the low speed range. Thus running at low speeds even with rated torque for long periods is not possible due to overheating of the motor. Even here, in the last generation compressors, the cooling of the VD is performed via expansion of the refrigerant itself, so totally disconnected from the outdoor conditions, in a constant manner, all over the temperature range. This integrated soft-starter function is also one of the main advantages of this new generation compressor.

The same efficiency rate can be kept all over the speed range, or capacity regulation range, nearly in a constant way. As you can read in the graphic nearby, the oscillation at a given condensing temperature is limited between 7% and 10%, so almost constant. This is the advantage also of another type of compressor with fascinating technologies, but the application range of these VFD Screw Compressors is far wider than that one, allowing in practices a use the same as a standard compressor (see graphic below).

The compactness of these compressors is saving to operators a lot of wiring, control and space inside of the switchboard. These compressor needs only a drive signal, the rest (protection and control) is performed by the integrated electronics itself.

All in all there is a solution, which nowadays is setting the benchmark of screw compressor technology, allowing to control all aspects (thermodynamically and electrically) of the most power- intensive component of a refrigeration system.

Alexander Möller
RefComp SpA

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Eliwell: new Memory 1000 with data downloading via SD CARD

Eliwell has enhanced Memory 1000, making it quicker and easier to monitor the temperature of food storage equipment used in small shops or temperature-controlled warehouses.

Eliwell has recently improved the performance of its multi-channel data logger Memory 1000 (already available in various models with between 4 and 8 temperature inputs and with or without printer), now even more advanced thanks to the introduction of two new functions.

The first can be used to quickly download data onto an SD CARD, thereby avoiding PC usage during the process. The data can be viewed using the special software (compatible with Windows XP, Vista, Windows 7) supplied and consulted at any moment.

The second can be used to create reports in table and graph form; the process is now even more straightforward and immediate, thanks to the special button providing direct access to the print menu. Data relating to the past year's activity can be viewed and printed.

One of its main features is the fact that up to 10 analogue and digital inputs can be provided, eight of which are used for temperature measurement; the range has now been extended and the upper limit shifted from 50°C to 105°C.

Memory 1000 offers easy and intuitive configuration thanks to its menu, available in 15 languages. The recorded data appears in real time, on a large backlit display. The appliance offers complete alarm management for controllers connected to the network, with relays and buzzers used to indicate any system faults which have occurred.

Memory 1000, designed and constructed to meet the most common requirements of HACCP systems, allows the managers of small food shops (butchers' shops, fishmongers, bakeries, cake shops and ice-cream parlours) to easily log food storage temperatures, as well as being an indispensable tool for the recording and monitoring of temperature-controlled warehouses.

COMPANY PROFILE

Invensys Controls is an industrial technology group, operating on a worldwide scale in the design and production of controllers, systems and services aimed at the domestic appliance, commercial refrigeration, heating, ventilation and air conditioning sectors.

Across EMEA, the leading brands in this area are: Drayton, Eberle, Eliwell and Ranco.

Invensys Controls is part of the Invensys Group, a holding company listed on the London Stock Exchange and member of the FTSE 100.

PRESS OFFICE:
TAC – "Ti Aiutiamo Comunicando"
Via Costanza 26 20146 Milan Tel +39 02 48517618 fax +39 02 462037
Contacts: Paola Staiano, Monica Robustellini
Email: press@taconline.it
Web: www.taconline.it

For additional information: www.invensyscontrolseurope.com / www.eliwell.it

Do you want to hear about the latest developments in Eliwell's sector?
Subscribe to the Newsletter or send an email to: eliwellmarketing@invensys.com

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