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AirCo Systems Pakistan
Troubleshooting | Maintenance | Installations
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.”
Concrete cutting can be a big part of building or renovation projects
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.
Five methods to ensure safe and efficient concrete cutting on your construction project
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.
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.
Concrete removal and demolition
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.
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.
Excitement is building for the biggest night out for the cooling sector, with the Cooling Awards now just eight weeks away.
Our illustrious team of judges, drawn from all corners of the industry – an eye-watering 48 of them – have made their decisions following the face-to-face judging round. A total of 19 trophies are up for grabs in the main wards, meaning that a lot of people will be on tenterhooks ahead of the main event at the Hilton on Park Lane on September 25.
The RAC and IOR National Student of the Year Award will also be presented on the night.
As award-winning comedian and podcaster Russell Kane makes a triumphant return to the Cooling Awards, there is also set to be plenty of entertainment on offer for everybody, whether oR not they are directly involved in an award. And with around 500 of the industry’s finest set to be attending the dinner, the networking is expected to be equally high-quality too.
There’s still time to book tables for the event at https://coolingawards.racplus.com
Heatstroke kills 32 year old former athlete
So what can we do about heatstroke? Well this report from the BBC tells us more about the effects of heat on the body.
Those in construction are at particular risk of suffering heat related illnesses since they are often expected to do hard physical tasks for long hours, often out in the open.
Dealing with hot weather on projects
High temperatures will impact productivity, but the construction schedule should not endanger people’s lives. Extreme temperatures above the norm may be reason to lodge a variation claim with the client.
Of course heat doesn’t also impact people’s lives it can impact concrete and other products. Concrete, mortar, adhesives and paints will all dry out rapidly, which could lead to problems with finishing the work as well as cracking and other problems.
Take adequate precautions to ensure that heat doesn’t endanger safety or impact quality on your construction project. Working in a cool office may insulate you from the severe heat while others on the project have to deal with the full impacts of the hot temperatures.
How will your project deal with the high temperatures?
AirCo Pakistan | Maintenence | Troubleshooting | Installations