Improvements in functionality and optimising for low-GWP were high on the agenda for Chillventa exhibitors, reports Andrew Gaved in the second part of our show review
Emerson Climate Technologies
The compressors giant told the Chillventa audience that it was motoring ahead with product qualification for low-GWP refrigerants: “Emerson has a long-standing commitment of proactively investing in and evaluating sustainable alternatives for commercial refrigeration, specifically for components and controls with environmentally friendly refrigerant capability.”
“Emerson actively participated in and published several reports for AHRI’s Low-GWP Alternative Refrigerants Evaluation Programme,” said Rajan Rajendran, vice-president, systems innovation center and sustainability, Emerson Climate Technologies.
“It has invested in a full line-up of R134a, R407A/C/F compressors for commercial refrigeration applications and R744, propane and ammonia offerings for appropriate applications, depending on regulation and performance.”
In addition, the company says it is “actively engaged” in the qualification of lower GWP refrigerant alternatives such as R448A and R449A to replace R404A/ R507A-type refrigerants, and R450A and R513A as an alternative for R134a.
Production release of a wide range of scroll and semi-hermetic compressors for R448A, R449A and R450A is expected in Q1 2015, with R513A to follow soon. “Emerson is prepared to devote more resources and to support customers with field trials,” the company said.
The company boasts a full-range of products for carbon dioxide refrigeration, from compressors to condensers to controls and featuring semi-hermetic reciprocating and scroll technologies, along with digital capacity modulation, flow controls and electronic controllers.
The range of Copeland Stream CO`2 compressors are characterised by a design pressure of 90 bar suction and 135 bar discharge.
With six medium temperature models, the expanded Stream 4MTL range provides refrigerating capacities between 9 kW and 37 kW in transcritical applications.
The Stream 4MSL compressors feature high standstill pressure capability to ensure full system resilience in case of operation interruption. The low temperature Stream 4MSL range also offers six models and covers cooling capacities between 8 to 32 kW for low temperature applications operating on R744 subcritically.
The ZO Copeland Scroll compressors, meanwhile, are designed to meet the high pressure and severe lubrication requirements encountered in subcritical R744 applications, with standstill pressures of 30 bar suction and 52 bar discharge.
The range covers refrigeration capacities from 5 kW to 23 kW, with six standard models and two Digital Scroll models.
In addition to the CO2 compressors, the firm offers a wide range of valves and controls for receiver and evaporator control in subcritical and transcritical applications. The product offering includes EX series high linear electrical flow control valves designed for a maximum operating pressure of 60 bar for subcritical applications and CX series valves designed for a maximum operating pressure of 120 bar for transcritical applications.
The company has also expanded the range for its CoreSense diagnostic systems, offering it as an option to the new Copeland Scroll Summit series compressors for MT and LT refrigeration applications.
Emerson believes that CoreSense offers a significant benefit to end-users, system builders and engineers alike – enabling communication with system controllers via the integrated Modbus protocol and maintaining a data and alarm history, together with compressor asset information such as model and serial number.
The company says: “With CoreSense Diagnostics, the compressor turns into a maintenance engineer’s assistant and helps identifying failures before they occur and become fatal for the refrigeration system.”
Another key launch for the manufacturer was its assembly of ZP725K scroll compressors for R410A, which promise to enable chiller makers to offer 1 MW of cooling capacity (air-cooled) and 1.25 MW (water-cooled).
Emerson notes that Eurovent publications have shown that systems with scroll technology and R410A refrigerant demonstrate an overall better seasonal performance than similar systems using R134a screw compressors.
In addition, chillers with Copeland Scroll compressors are more compact and the performance of trio assemblies is not affected by any unloading feature when only one of the three compressors is running, leading to lower installation and running costs.
Heat exchange specialist Güntner showed how its latest products are optimised for specific refrigerants, with tube diameters and materials and fin geometries all aiming for maximum capacity with minimal tube volume.
The new GACV air cooler series (Güntner Air cooler Cubic Vario) promises high design variability in materials, types of fans and additional accessories within a capacity range of 1 Kw to 335 kW and in a compact configuration.
Meanwhile, the new GCHV condenser and dry cooler series (Güntner Condenser Horizontal Vario) and GFHV (Güntner Fluid cooler Horizontal Vario) also emphasise flexibility in design.
With a capacity range of up to approximately 1,300 kW and a modular design concept.
The firm says the optimisation considers a variety of technical and economic aspects, such as adapting the velocity of the fans to the required sound specifications during the design process.
All units of these series are also available in a vertical version as GCVV or GFVV.
The new GASC air cooler (Güntner Air cooler Slim Compact) is a slim, ceiling-mounted unit available for HFC as well as CO2, with a capacity range of 0.6 kW to 14 kW, well suited for applications in commercial refrigeration, especially those requiring low capacities in coldrooms with low ceilings.
At the high-efficiency end, the GACC air cooler (Güntner Air cooler Cubic Compact) comprises a high-efficiency heat exchanger with staggered tube pattern in a compact casing, in a capacity range of 1.5 kW to 68 kW.
Boasting easy-to-open components like drip tray and heating sheet and the easy-to-open side covering, the GACC is readily accessible for inspection and maintenance and is cleaned “in next to no time”, the firm says.
With the optional Güntner Streamer, the air-throw into the cooling room is especially high, it adds.
Diverse manufacturer Danfosss offered a range of new products for refrigeration and air conditioning applications.
For air conditioning, Danfoss launched three VZH inverter scroll compressors, for close control, small rooftops, air handling units, and process cooling applications.
The firm says the range will deliver cooling capacities between 14 kW and 26 kW and up to 46 kW in manifold configuration. They modulate from 15 to 100 rps and feature the Danfoss Intermediate Discharge Valve for higher part-load efficiency.
Danfoss also brought its latest development in electric expansion valves to the exhibition: The ETS Colibri platform, designed for precise liquid injection into evaporators, has a compact and in-line design, which easily fits almost anywhere in the system, Danfoss says.
The hermetic body guarantees uncompromised integrity of internal components and fewer potential leak points in the system, the firm adds.
Another innovation from the manufacturer is the IntraFlow feature in its new Turbocor compressor, which improves compressor efficiency and extends the stable operating range while simplifying capacity control. Since it only uses a flow valve to direct the refrigerant, there are no moving parts needed to manipulate aerodynamic conditions, and the firm says its increased turn-down capabilities extend the stable operating envelope “far beyond what can be achieved using IGVs or Variable Geometry/Mechanical Diffusers”.
At the component level, to improve reliability and part-load efficiency with manifold compressors, Danfoss has designed the ‘organ pipe’, capable of retaining oil in non-operating compressors under part-load conditions and thus reducing the risk of failure due to poor lubrication.
It also improves heat transfer in the evaporator, boosting overall system efficiency.
The solution is available in the R410A SH scroll range from 15 HP to 40 HP.
For commercial refrigeration, Danfoss has introduced the ERC refrigeration controller for glass door cabinets, fridges and freezers and small cold rooms.
The smart multipurpose refrigeration controller with temperature and defrost management comprises three different models.
Meanwhile former subsidiary Secop has launched new DLE and NLE compressors for R290 refrigerant, which are distributed exclusively by Danfoss.
These new models deliver “amazing” savings in energy, the firm claims – up to 40 per cent compared to existing models and up 10 to 15 per cent when measured against the next best rival.
Finally for supermarket applications, Danfoss has developed a new ADAP-KOOL system manager, together with the AK-LM 350 COP, claimed to be a new solution for real-time Coefficient of Performance measurement of refrigeration plants.
The monitoring unit is equipped with data communication and is operated via a PC.
The manufacturer also debuted pack controllers for convenience stores. The AK-PC 351 and AK-PC 551 are designed to be easy to set up with optimised control algorithms, factory defaults and fast commissioning – Danfoss boasts proudly that they can be up and running in under five minutes.
Compressors-to-condensers specialist Tecumseh celebrated 80 years in the refrigeration business with the launch of a number of models.
Prime among these was the AJ2 range , boasting high levels of interchangeability, compactness and silence.
Following on the path of its predecessor, the popular AJ range, Tecumseh says the AJ2 delivers best-in-class efficiency, a wide capacity range; a smaller size envelope; and Tecumseh’s “industry standard for reliability”.
While designed for used with traditional commercial refrigeration refrigerants R134a, R404A and R22 the manufacturer has optimised the 23-model range for R1234yf and R290, under the tagline “Ready for Tomorrow”, with capacities of 300 to 830 W in LBP and 600 to 2770 W in HBP configuration.
The AJ2 Compressor range is now available while the AJ2 Condensing Unit Range will be available in 2015.
Meanwhile, the new AE2 range claims maximum power in a smaller housing, along with ‘the highest performance levels on the market. The 49 models in the AE2 range provide refrigerating capacities from 140 to 340 W in LBP and 300 to 1050 W in HBP mode.
The AE2 compressor is aimed at display cases, ice machines, beverage coolers and commercial refrigerators and freezers.
Both compressors and condensing units are optimised for use with R290, but are also designed to support traditional R134a and R404A.
It has also introduced the AEX compressor, designed for low-to-medium back pressure applications (-35 deg C to -5 deg C), initially optimised for R134a allowing use in bottle coolers and vending machines.
Another key element in the manufacturer’s armoury is the Te-Connect, a safe and secure connection, claimed to virtually eliminate wiring errors, together with the electrical insulation required for HC refrigerants, and earth-ground integration.
Tecumseh claims that with the connection, compressor wiring can be connected in less than two seconds, while requiring fewer components.
The firm also showed a range of “concept” units for customer feedback, including a sanitary water heater that uses R134a to create its heat; an R290 water-cooled condensing unit, designed to cool integrated display cases; and an R290 micro-chiller for commercial refrigeration,with options for chilled water loop evaporators and/or condensers.
The refrigerant specialist celebrated its parent company The Dehon Group’s 140th anniversary at Chillventa with the release of an app that will enable users to make appropriate refrigerant choices to comply with the new F-Gas Regulations.
The F-Gas Solutions application provides a useful GWP calculator and enables the user to convert the refrigerant charge by weight into CO2 equivalent.
The app also provides details on the solutions available to users in a range of applications and types of equipment.
Jaeggi launched the Hybrid Blue, a dry cooler that enables adiabatic pre-cooling of the ambient air, to ensure low coolant-out temperatures when the outdoor temperature is high. This is achieved via humidification pads in an angular arrangement in front of the heat exchanger coil, with a control system ensuring that the appropriate amount of water for the humidification of the pads is precisely calculated at any one time. The ADC units are tested that there are no aerosol emissions and they carry hygiene certificates.
The hybrid dry cooler is a combination of air-cooled dry coolers and closed evaporative cooling towers, thus combining the advantages of conventional dry and wet cooling in a single product.
They can be operated like conventional dry coolers without wetting the heat exchangers.
At high outdoor temperatures or higher plant loads, the plume-free wetting of the heat exchangers increases the hybrid cooler’s performance by a factor of two or three, compared to dry operation, the company says.
Diagnostic specialist Kriwan promoted the concept of condition monitoring at the show, based on taking regular analysis of a machine’s physical parameters, such as oscillations, temperatures and pressure, to ensure safety and machine efficiency.
Kriwan says its products are used to record the relevant system parameters using sensors, as well as to analyse the data by means of its diagnosis technology: “This makes both controlling the power output of refrigeration systems and protecting these systems safer, faster and more efficient.”
Its new PTC+ sensors offer added protection for temperature monitoring in motor protectors with a diagnosis function, while new software and functionalities have also been added in order to expand the range of INT69 diagnosis technology available.
Its INT69 compressor protection devices are able to analyse compressor data, analyse faults and thereby increase the service life of the compressor.
At Chillventa, the firm unveiled its Web-based INTelligence 3.0 application, which is designed to analyse and evaluate data collected straight from the protection device, enabling customers to access and evaluate this data at any time, wherever they happen to be.
The platform can be accessed from any smartphone or PC, without the need to install any software.
Thanks to responsive design, the platform interface is automatically optimised for the device being used.
Also, whenever Kriwan adds new features, they are automatically available to everyone – without the need to install updates.
The firm says users can visualise the system’s operating times and load demands at any point, displaying the data in tables or using diagrams – or even compile reports.
Users can also compare various parameters amongst multiple compressors within a single system.