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Finalists announced for $1m Global Cooling Prize

The backers of the Global Cooling Prize have announced the eight finalists who will compete for the top prize of one million dolllars and runners up prizes worth a further $2 million in total. Entrants were assessed on their technology’s ability to offer have at least five times lower climate impact than that of the baseline AC unit of a 5.3 kW fixed speed split AC unit with an Energy Efficiency Ratio (EER) of 3.5 and using R410A refrigerant with a GWP of 2088.

Finalists come from around the world and represent companies large and small: Gree Electric Appliances. of Zhuhai, China; Daikin AirConditioning India;.Godrej and Boyce and ATE of India; S&S Design Startup Solution, also of India; Transaera Inc, M2 Thermal Solutions and Kraton Corporation, all of the US and Barocal of the UK.

The eight teams selected pitched a wide range of technologies, including smart hybrid designs of vapor-compression designs, evaporative cooling designs, and solid-state cooling technologies that use little or no global warming refrigerants.

Sir Richard Branson, Founder and CEO of the Virgin Group and global Ambassador for the Prize said: “It gives me immense satisfaction to say that we have received some absolutely revolutionary cooling ideas, What makes this competition especially exciting is the market transformation opportunity. It could be one of the biggest technology-based steps we can take to arrest climate change. Congratulations to the finalists of the Global Cooling Prize. I look forward to following all of you on your journey to winning the Prize and scaling your solutions globally.”

Representing the UK’s hopes is a start-up spun off from the University of Cambridge, Barocal Ltd. Here researchers at the University of Cambridge’s Department of Materials Science and Metallurgy are developing a solid-state cooling technology to solve the cooling challenge.

This solid-state Barocaloric cooling technology takes advantage of the properties of solid organic “plastic crystal” materials to provide cooling. By applying pressure to these organic solid crystals, it is possible to change their molecular orientation which results in a solid state phase transition, thus causing a change in their entropy (degree of disorder) which leads to a temperature change of the system.

The process of continuously “applying and releasing pressure” on the Barocaloric material results in solid-to-solid phase changes in the crystals which results in large thermal changes due to molecular reconfiguration. This produces a cooling effect which can be delivered either to the room air or to produce chilled water for cooling. These plastic crystals are flexible materials that are widely available and are low-cost and non-toxic. Research shows that the thermodynamic behaviour of these plastic crystal materials is very similar to commonly used refrigerants, which has the potential to create a viable and alternative cooling approach to the century-old vapor compression technology.

CO2 a natural choice for Danish food retailer

DENMARK: Danish refrigeration systems manufacturer Advansor has supplied a transcritical CO2 system with eight Bitzer EcoLine+ reciprocating compressors at a new distribution centre for REMA 1000 supermarkets.

The recently completed warehouse in the Danish city of Vejle will deliver goods to REMA 1000’s shops in western Denmark.

REMA 1000 is a multinational no-frills supermarket chain owned entirely by the Reitan Group. It supports more than 800 subsidiaries in Denmark and Norway.

The REMA 1000 project, which began in the summer of 2018, was described by CO2 systems specialist Advansor as “the biggest compound system in company history”.

The project began in the summer of 2018 with Advansor in charge of planning and realisation of the refrigeration system in collaboration with ICS Industrial Cooling Systems. The system was built from scratch, but the building itself is a former dry-storage warehouse.

The refrigeration system has a total capacity of 940kW at -4°C evaporation temperature and 32°C ambient temperature. And it is quite large, too, at 10.8m long. Six Bitzer EcoLline+ compressors ensure the medium temperature application, while two additional EcoLine+ compressors provide for even greater efficiency in parallel compounding.

Bitzer has has collaborated with Advansor since the German compressor manufacturer first started producing CO2 models, and REMA 1000 already uses Bitzer compressors in all of its shops.

“Bitzer is our preferred supplier. We get around 95% of our compressors from Bitzer,” said Advansor’s business development manager Kenneth Madsen.

He explained that this project marked the first time Advansor had opted for EcoLine+, mainly because of its high efficiency. It was also the company’s first experience with a line start permanent magnet motor (LSPM).

The LSPM motor is said to increase seasonal performance factor by more than 10%. These motors can be connected directly to 50 or 60Hz networks, offering higher efficiencies in both full and part load operation. Permanent magnet motors are robust, easy to use and can operate both directly on the mains network and with frequency inverters.

“Very few other technologies would be suitable for this system. They simply can’t handle the cold climate here,” explained Madsen. “The fancy stuff with ejectors and the like wouldn’t be worth trying out in an application like this. LSPM is a good technology because it works in any climate.” Advansor’s system design combined with LSPM is said to enable a new level of energy efficiency – by more than 10%.

Natural” refrigerants are common in Denmark due to charge size limits on HFC refrigerants which have been in place since 2007.

“In Denmark, it’s probably easier than in other countries for these systems to gain a foothold. But it can still be difficult here.,” explained Kenneth Madsen. “Hydrocarbons would not be an option. Ammonia, perhaps, but most distribution centres and smaller businesses rely on CO2 because it is cheaper to both acquire and operate. Five or 10 years ago, this project would have opted for an ammonia system – but now the focus is on CO2 for such cases.”

“The demand for industrial CO2 systems is constantly increasing, especially with permanent magnet motors, because they save on operating costs and reduce the impact on the climate,” claimed Advansor’s Denmark country manager Casper Christiansen. “Of course, compressors with these motors are more expensive to acquire – but this investment pays off within just a short period of time.”

Compressor talk marks IoR 120th anniversary

UK: The Institute of Refrigeration (IoR) celebrates its 120th anniversary next month with a talk on the history of the HallScrew compressor at the equally historic RAF Museum in Hendon.

The IoR was formed at a meeting chaired by R M Leonard with 16 interested individuals on the 8 December 1899 at the London Chamber of Commerce. Leonard, editor of Cold Storage and Ice Trades Review, a forerunner of RAC magazine, subsequently became the first secretary of the Cold Storage and Ice Association, as it was initially known.

To mark the occasion, Terry Young of J&E Hall will chart the development of the HallScrew compressor, first introduced in 1972 using a concept of single main rotor plus two gate rotors. This talk describes the challenges encountered during the development process, from the first open drive prototype to decades later a compressor that encompasses innovations and advanced design features necessary to meet today’s shifting world of refrigeration.

The joint meeting with the London Refrigeration and Air Conditioning Society will be held at the RAF Museum in Hendon on December 4. Before the presentation, those attending will have the opportunity to explore the Museum and discover the fascinating story of the RAF.

5 Tips on how to safely cut concrete!

​Concrete cutting can be a big part of building or renovation projects

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Picture courtesy of SEQ Concrete Cutting Pty Ltd

Concrete cutting requires incredible precision, proper training, and the right equipment. Due to the complexity of the job, it should be a task reserved only for professionals.

There are many ways to cut concrete and various types of cutting machinery to get it done. In building or concrete demolition projects, the cuts can vary in depth and length. This is why a precise and well-trained hand is needed to ensure that the cuts are created in the exact size they should be.

The type of cut needed for each project should also be used as basis for the type of equipment to be used to cut the concrete. Whether you’re looking to cut curved or straight, deep or subtle lines, there is always the right equipment to get the job done.

If you’re looking for professional concrete cutters for your project then choose a local contractor who has the manpower and machinery to provide the services you need.

Regardless of whether you need to cut concrete to create windows or doors or simply would like to get concrete floor sawing services, professional contractors can get these done for you. In fact, there is a specific machine to ensure safe and precise concrete cutting for your project, and the right contractor should know which one to use.

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Picture courtesy of SEQ Concrete Cutting Pty Ltd

Five methods to ensure safe and efficient concrete cutting on your construction project

Flush cutting
If you need to cut a straight line on a concrete floor then flush cutting is the best option. The flush cutting saw creates a precise straight cut at any depth, making it the perfect tool for cutting concrete or reinforced concrete.

It’s also ideal for cutting stone or bricks. With proper training, a flush cutting saw is generally easy to manoeuvre. It’s considerably smaller too, which makes it a great option for cutting in small or narrow areas that large machines can’t reach.

Hand and ring sawing
Hand saw and ring saw are great cutting machines to use for concrete cutting. They can work wonders especially when manoeuvred by skilled hands. These types of machines are perfect when you need to create precise cuts without much regard to the depth.

These cutting saws are best used for wall sawing, cutting expansion joints and doorways, and removing footpath and concrete slab. They are highly efficient and use a dust and water system to avoid dispersion of debris which could cause disruption of work in your site.

Hydraulic and High-Frequency Sawing
Concrete cutting can be noisy and disruptive. This is why it’s not always the easiest task to manage if you’re working on an indoor project. It can quickly become messy and time-consuming with the preparation, actual cutting, and post-cutting cleanup.

Hydraulic and high-frequency sawing by professional concrete cutters is a quick fix to the problem. These types of cutting saws generate low noise and are fume-free, which make them the perfect option for indoor projects. They’re also easy to manoeuvre, making concrete cutting a lot easier.

Road sawing
Large scale indoor and outdoor projects such as floor or road sawing often require special types of machinery that will ensure that the cuts are precise with the right depth. For these projects, special concrete cutting saws must be used to ensure perfect cuts.

Professional concrete cutting service contractors often use equipment that can create cuts with a depth of 375 mm to 500 mm. These cutting saws can cut through floors, asphalt, and pavements.

Diamond saw cutting
There are two types of diamond concrete cutting saw: the dry cutting saw, and wet cutting saw. The dry cutting saw generate the best result when successional cuts are made on the same spot to increase depth.

Meanwhile, the wet cutting saw can be used continuously as it uses water to prevent dispersion of dust and prevents the saw from overheating. Both cutting saws are often used in large scale projects as they can create precise and smooth cuts on concrete.

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Picture courtesy of SEQ Concrete Cutting Pty Ltd

Concrete removal and demolition

It’s common in renovation projects to alter the size or totally remove concrete, whether it’s concrete floors, slabs, pillars or walls, among many others. Usually, concrete removal is regarded as a messy task that needs a lot of precaution and planning.

While it is true that concrete removal can be stressful, it doesn’t always have to be as costly and complicated of a task as most people regard it to be. With the right professionals, it can be done in the fastest and easiest way possible.

As established earlier, one of the perks of working with concrete cutting and removal contractors is their plethora of high-quality machinery. But more than that, they are the best option for the job because of their training and safety gear. They know how to cut and remove concrete in the safest and non-disruptive manner possible.

Core drilling

Apart from concrete cutting and concrete removal, core drilling is also another highly sought after service from professional contractors. Drilling on concrete is often sought before electrical or plumbing installations in buildings.

A modern core drilling machinery can drill up to 1000 mm in-depth, with a diameter of up to 1200 mm. Professional contractors can do regular drilling, inverted drilling or stitch drilling — all depending on the type of holes needed for your home’s engineering and architectural plan.

When working on a renovation or a new building, knowing what types of concrete services you’ll need from professionals can make the entire process a lot easier for you. You can effectively relay to professional contractors what you need and they can guide you through the processes needed to get it done.

And since a good contractor essentially means easier building and renovation, you must do your due diligence before committing to one. Choose contractors who have the experience and skills needed for the job and are situated locally.


Tefcold owner becomes Interlevin MD

UK: Torben L Christensen, the owner of Tefcold, has taken over as MD of Interlevin Refrigeration.

He replaces Jonathan Corns who was appointed MD last year following the company’s acquisition by Tefcold, the Danish family owned commercial refrigeration company.

“We see Interlevin as a very important part of the Tefcold Group and for Interlevin to reach its full potential we believe we have an obligation to get the best possible integration into the group,” said Christensen.

“The group management have decided that I take over as MD in order to make sure we share best practices around processes through the group and grow Interlevin within the marketplace. While we have seen many operational improvements during the last financial year, we know that there is still room to grow and maximise our offering within the commercial refrigeration sector.”

Survey seeks to boost womens’ careers in RACHP

UK: The IoR’s Women in RACHP Network is inviting the refrigeration, air conditioning and heat pump sector to complete a survey to gauge attitudes towards women in the industry.

As the RACHP sector continues to struggle to bring more women into the industry and utilise female talent to its full potential, the Women in RACHP Network is undertaking research in this area in an aim to drive change. The network is encouraging everyone in the sector to take part in the online survey which is intended to benchmark the industry’s benefits and attitudes towards women and explore what should be done to close the gender gap.

It is clear that women are under-represented in engineering and the RACHP sector is no exception.

“Although there are no official figures in the UK the reality of the RACHP sector is comparable to that of the US where women represent only 1.2% of the HVACR workforce,” said committee member Astrid Prado, marketing manager at Star Refrigeration.

Maintaining that a reputation for the refrigeration and air conditioning being “man’s work” is failing to attract talented women at all levels, Prado said it continued to operate with work packages “developed decades ago for a largely male, full-time workforce” and was “failing to keep pace” with the expectations of the modern workforce.

“In order to drive change, we must redesign current workplace practices to accommodate the diversity of today’s workforce who want flexibility, equal opportunities, and better access to training and development.”

Prado added, “Although this is only a starting point, the outcome of the research will serve not only as a point of reference but as industry guidance for the future, to help us improve and ensure we offer an attractive package to women so that they are inspired to join and stay in the industry.”

The survey is open to both men and women working in all roles and from all pay grades and structures. All entrants completing the questions before December 1 will be added to a prize draw to win a Latitude travel charger set.

The Women in RACHP Network was set up by the Institute of Refrigeration as an educational and networking group to encourage diversity in the workforce and promote the role of women in refrigeration.

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