FEATURE REPORT PRODUCT NEWS Looking for reliable Thermostatic Expansion Valves?
Wide range of 150 different models of RFKH valves with exchangeable orifice
R455A/R454C Low temperature range MOP A2L
Find your local Sanhua dealer
www.SanhuaTXV.com
Williams
Williams offers a comprehensive range of products that allows for the creation of a food storage solution in kitchens of any size. Cabinets and counters come in a range of sizes, from one and two door cabinets, and one, two and three door counters including compact and slimline models.
Another flexible choice is Williams’ chef’s drawers. These
are compact single draw units that can be sited underneath standard worktops or stacked, helping to maximise available space and create a flexible storage system where it’s needed. They are also available in variable temperature models, working either as freezers or refrigerators. By being able to adapt to changing needs this makes changing the menu simple, as well as reducing the need for further investment in equipment. While everyday refrigeration is vital for reducing food waste, the implementation of techniques like blast chilling and blast freezing can help to introduce new methods of food preparation. Using cook-chill systems to prepare food in advance helps businesses meet production targets with fewer staff, while ensuring batches of food are kept in peak condition until required.
Blast chilling works by reducing the temperature of a 50mm layer of food from +70°C to between 0°C and +3°C within 90 minutes, and then holding it until it’s required. A well- maintained system can keep food at this temperature for up to 5 days before regeneration with no loss of quality. Blast freezing works in a similar way, except the hot food is reduced from +90°C down to -18°C in 240 minutes and the food can be stored for much longer. Other benefits include being able to store frozen food for longer, reducing the frequency of food deliveries required on a day to day basis. Standard fridges and freezers are unsuitable for reducing food temperature this way. The heat radiated by food increases the chilling time and raises the temperature of the refrigerator, which can degrade any other food stored in there. The key to blast chilling and freezing is to get the food through the danger zone between 63°C and 5°C, where bacteria grows most aggressively, as quickly as possible. Williams blast chillers carefully control airflow and air temperature to ensure perfect results, and can be programmed to handle a range of foods.
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www.williams-refrigeration.co.uk
Carrier
Carrier has introduced high- performance heat recovery and free cooling options to its AquaSnap® 30RBP air-cooled scroll chiller range on lower global warming potential (GWP) R-32 refrigerant, providing even greater energy savings and further reducing operating costs for end users. Carrier was the first European manufacturer to introduce a fully optimised scroll chiller range on R-32. AquaSnap units also have an outstanding seasonal energy performance ratio (SEER) for cooling of up to 6.62, reducing indirect greenhouse gas emissions resulting from energy use. The latest heat recovery and free cooling options extend energy savings, further reducing greenhouse gas emissions over the lifetime of the equipment. The heat recovery system enables chillers to produce domestic hot water up to 80°C, while continuing to provide cooling, useful for applications such as hotels, hospitals and industrial processes requiring hot water. The free cooling option makes use of favourable ambient and load conditions, harnessing free cooling from the environment to augment or replace mechanical cooling via the chiller’s compressors, reducing energy consumption and running costs. Two versions of free cooling are available. Partial free cooling is designed for applications with a variable primary cooling load, such as offices and healthcare, which may also have a constant residual cooling need. Examples include computer suites or scanner facilities. The total free cooling option is designed for applications with a constant cooling need throughout the year, such as industrial processes and data centres. Carrier’s hydronic-based free-cooling system automatically activates when the outdoor air temperature drops 1 degree C below the chiller’s return water temperature, harnessing the full free cooling opportunity and maximising energy savings. For example in Berlin, the hydronic free cooling potential is 50 to 95% of annual chiller run-time, depending on the application. In more northern locations, the potential free cooling opportunity is even greater. If free cooling is not sufficient to meet requirements, a mixed mode – using both free cooling and mechanical cooling – is automatically activated, ensuring the cooling needs of mission critical applications are always met.
www.carrier.com
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www.acr-news.com • July 2022 33
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