Stuart Corr, techno commercial director of refrigerants manufacturer and supplier Mexichem, discusses why counterfeit and unregulated refrigerants are such a concern for the industry.
Counterfeits - imitations of branded products from reputable, original manufacturers - exist in both consumer and industry environments, but the negative implications of the latter are much more dangerous.
A new approach to ice rink refrigeration is saving end users thousands of pounds a month in energy costs. ACR Journal looks at an award-winning* approach that is helping to transform the economics of skating rinks.
The UK’s ice rinks are experiencing something of a renaissance, resulting in an explosion of outdoor temporary rinks, a feature in many town centres over Christmas, and stimulating investment in new and refurbished permanent rinks.
1 Don’t forget inhibitors
Glycol is an essential element of any heat transfer fluid used as part of a chilled water system, as it allows the fluid to be sufficiently chilled without freezing. However, an uninhibited glycol system can pose even more of a risk than plain water due to the highly corrosive nature of most glycols, so inhibitors must be used at all times.
For those operating in areas where there is a risk of incidental human contact, such as the food processing industry, the wrong inhibitors in an MPG solution creates a serious contamination risk, but an NSF-accredited glycol overcomes that.
2 Take regular water samples from various parts of the system
Corrosion and degradation can happen anywhere within a system and it’s not enough to take water samples from just one location. Samples need to be taken from available access points around the system and especially from high risk areas such as heat exchangers, cooling jackets and any other sensitive product-fluid interfaces.
3 Test fluid pH levels
Not taking pH level readings as part of routine water sampling can have a major negative impact on a system’s performance. While chiller pH tolerances will vary slightly depending on the materials used, I would recommend limits of 8.0 – 8.5. Incorrect pH levels may indicate that either not enough inhibitors have been used, or the glycol levels are too concentrated. Both scenarios can very quickly cause high levels of corrosion throughout a system if left unchecked, leading to costly maintenance bills and unplanned downtime.
4 Check the clarity of the sample
Not all tests are as in-depth as pH level, and one of the most obvious signs that a chiller system is degrading or corroding internally is when there’s visible debris in the water sample. A water sample from a chiller operating correctly should be clear and if it’s not, then there’s already some internal system damage. This needs to be addressed immediately as the debris can soon lead to blockages in key areas of operation such as the heat exchanger, which will rapidly decrease the chiller’s efficiency.
5 Chemically flush your system and chiller immediately after installation
As soon as a new chiller is installed, the whole system should be flushed immediately to ensure the fluid is completely free from contaminants and at the highest quality possible, with no legacy debris or surface contamination present to cause damage to the fluid, the pipework and the new equipment. This golden rule should be followed whether it’s a permanent or temporary installation for planned or reactive maintenance.
6 When in doubt, consult the experts
Given the intricacies of taking a thorough and correct chilled water system sample, sometimes it pays to call in an expert. Regular water sampling and off-site laboratory analysis is available as part of some chiller manufacturer’s aftersales and servicing packages – including Planned Preventative Maintenance Packages (PPM) from ICS Cool Energy.
When developers demanded very low sound limits for two new apartment building in London, Cool-Therm worked with contractors to come up with the answer.
Cool-Therm has supplied an ultra-low sound, high efficiency 1.8MW air conditioning solution for a prestigious development of luxury apartments in London’s Westminster.
Leading research bodies agree that refurbishment of buildings has a lower environmental impact than new build. Even so, it is still all too common for consultants and contractors to propose a comparatively straightforward new build project over a complex refurbishment and still parade their ‘green’ credentials.
Leading research bodies agree that refurbishment of buildings has a lower environmental impact than new build. Even so, it is still all too common for consultants and contractors to propose a comparatively straight-forward new build project over a complex refurbishment and still parade their ‘green’ credentials.
So, when a major retailer needed more capacity for its frozen products, it was presented with the usual two choices: build a new warehouse from scratch, or repurpose an existing building. Like all businesses facing these choices, the decision requires careful consideration and understanding of a number of factors.
A recent Fujitsu VRF VR II Heat Recovery installation by H & D Air Conditioning at Quadrant Systems helps to keep the flight simulation company flying high.
Anyone fortunate enough to have been in a flight simulator will know what a cool experience that is. As well as being used for ‘fun’ experience days though, flight simulators also have a more serious and vital role in training for both civil and military crews.
Flight simulation experts Quadrant Systems Limited have operated from their purpose built facility at Burgess Hill since their formation in 1994. Quadrant are active across the core areas of the Flight Simulation Industry serving a diverse and worldwide customer base both with the in-house Training Centre and the Design, Engineering, Maintenance and Relocation teams.