Why New Cooling Tower Tests Should Not Be Rushed

Posted by on Feb 27, 2017 in Uncategorized |

Some owners of cooling tower systems may want to assess whether a new cooling tower is performing at the same level as the designed specifications after only a few days of installing. However, you may need to run the cooling tower continuously for more than a month before you can decide whether it is performing in accordance with its cooling tower design. This article discusses some of the reasons why extended testing is necessary. Removal of Processing Agents Some cooling towers may perform below the level indicated in the designs because the fill material that was used in that tower still has processing agents or films that are lowering the thermal performance of that fill material. For instance, some fill material manufacturers apply a coating on the fill material so that it doesn’t degrade during storage. It is therefore necessary to operate the cooling tower for several weeks so that those coatings can be removed as water recirculates within the system. The fill material will then be able to perform at the high level that was indicated in the design specifications. Allowing Surface Oxidation Some fill materials, such as rigid PVC, may need to react with the oxygen in water in order to prevent water from beading on their surface. Cooling tower performance has a higher chance of reaching design levels when water can form a film on the fill material instead of beading on the surface of that fill material. Beading prevents complete fill coverage by water. The result is that thermal performance will lower since less water will be able to be cooled by the fill material. Extended test periods allow the fill material to oxidise so that water beading is minimised. Mineral Deposit Formation Another key reason why you should test the cooling tower over several weeks is that its performance will keep improving as a thin layer of mineral deposits from the water forms on the surface of the fill material. Those mineral deposits increase the ability of a water film to form on the fill material because the deposits are slick and allow water particles to adhere onto their surface. Such beneficial films cannot form in a few days after the new cooling tower has been set up. Work with the designer and supplier of your cooling tower so that an appropriate testing schedule is formulated for the new cooling tower. You will then be able to avoid making costly adjustments to your new cooling towers that may have had nothing wrong with their...

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How to Fail Miserably at Laser Cutting

Posted by on Dec 7, 2016 in Uncategorized |

Just like other power tools, laser cutters are normally built around doing things extremely well. However, they need an operator’s full support and attention. Operators must handle everything that goes on after, during and before the job. Getting adequate results isn’t hard. However, to get truly repeatable and professional ones takes experience, attention to detail and hard work. It’s normal to focus on success stories. Nevertheless, learning from failures is more educational. In the spirit of this idea, the following are some of the ways of failing miserably at engraving and laser cutting: Failing to test a sample Getting excellent results entails more than just speed settings and correct power. Even if speed and laser power are technically correct for a material, you must run a test. Doing so reveals any special handling that’s needed to get rid of cosmetic blemishes such as scorching. Failing to install your equipment where smell and noise won’t be an issue The cooling system, laser cutter, and exhaust fan are not as loud as table saws. Nonetheless, they’re still loud. They can run for long periods. This is especially true when engraving. If some folks are nearby, they may object to the noise. Additionally, even with proper filtration or exhaust, there will still be some smells from the cutting process. Therefore, installation should be done in environments where smell and noise won’t be problematic. Failing to apply masking Applying a mask of tape to your material prevents scorching from damaging the surface. Generally, it gives engraving and cuts a cleaner finish. Numerous plastics have a protective film on both or one side. Application tape is an excellent alternative for numerous materials. You can buy it from sign shops. Failing to apply masking properly is also a possibility. Remember that if the mask shifts or lifts, it can ruin the piece big time. Failing to budget and plan for extended needs of a laser cutter Laser cutters need not only power, but also cooling and exhaust. An exhaust might be ducting and a fan or a filter system/fume extractor. Generally, it’s excellent practice to ensure any exhaust tubes are as short as they can possibly be. Is your laser tuber water-cooled? You need a cooling system, which circulates distilled water via the tube to close too. To avoid the above failures, you must cultivate a sense of constant improvement and documentation. After all, failure is only bad if you don’t learn. Do not get distracted trying to improve your laser cutter for it to perform faster or do more. It might seem like the problem, but you may be the...

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Factors to Consider When Investing in a Water Tank

Posted by on Oct 27, 2016 in Uncategorized |

If you live in an area that is hard hit with water restrictions, you may want to boost the amount of water available to you through rainwater harvesting. Therefore, you will need to purchase a water tank that will be able to meet your residence’s needs. Some people make the mistake of simply factoring in the cost of the water tank. The following are some of the other additional factors that you should keep in mind when contemplating a new water tank. Factor in the size of the water tank A mistake some people make is associating the size of the tank in relation to the space they have available. This is not the best way to go about it as you can create space for your tank by opting for underground storage. When it comes to size, you need to factor in the consumption of your residence. There would be no reason to get a small tank with the aim of installing it on your roof, just to find that the amount of water cannot meet all your needs. Before making a selection of a water tank, ensure you have consulted with the contractors on what your average consumption is and base your decision on the capacity of the tank. Factor in the space available for the tank Once you know how much water you would need on a day-to-day basis, you can then start contemplating the space available for the tank. The different sizes of water tanks will dictate the placement of the tank. For instance, if your household consumes a lot of water, then you will need a large tank to meet these needs. If you do not have adequate space available on your property, then you would have to opt for the tank being fitted underground. This would mean some site preparation and excavation being done on your property before your tank can arrive. On the other hand, if you have some available space but it limited, then you could opt for a slim design tank. These can be fitted snugly into smaller spaces that are adjacent to the home. Factor in the material of the tanks Water tanks come in an array of materials. The most common option are concrete tanks as they are both durable and economical. It should be noted that concrete tanks are also quite heavy and may not make a good choice for homeowners looking to install their tank on the roof of their home. Another option you could consider are fibreglass water tanks. These tanks are a lightweight option that are also extremely durable. However, they do tend to be pricier than other...

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Deodorising Your Fridge – Natural Remedies for Cleaning

Posted by on Jul 22, 2016 in Uncategorized |

Keeping your refrigerator clean and odour free will ensure you are eating the freshest foods without the risk of contamination. Regular cleaning is needed, however if you dislike the idea of using harsh chemicals you may find that making your own cleaners and odour neutralisers are more to your liking.  First and foremost when storing strong smelling food in your fridge try to seal it up in a freezer bag that has been sealed with a clip or tied up. Half cut onions, garlic, pet food and cooked meat are common culprits that will taint anything that hasn’t been properly protected. Secondly check the dates on everything regularly, as this will help to reduce the risk of moulds forming that can also contaminate other foods. If you have multiple items of the same product place the oldest one at the front so that you always have the longest shelf life possible. Finally clean up any spills as soon as they occur, milk often drips to the bottom of the carton and can cause a thick cream to develop in the recesses of your shelf which can trap dirt and grime. Meat juice is another culprit, however this can have serious health implications if ingested.  Neutralising odours and removing stains is simple enough and very inexpensive, however to avoid tainting your food whenever you clean your fridge try to remove everything and store it in a cool box to preserve its freshness. Baking soda has always been used as a versatile cleaning product and can be used on everything from sinks to fridges. Once the fridge has been emptied mix a thick paste of water and baking soda and use it to scrub away any spills and stains. Alternatively you can mix essential oils, water and white vinegar together for a fresh cleaner that not only cleans, buts gives your fridge a fresh scent. Just be careful not to use too much essential oil as this can taint food as well.  Once you’ve cleaned your fridge keeping it odour free is easy. Using a flat plate or a jar, place instant coffee granules or baking soda in it and leave it to rest at the bottom of the fridge for 24 hours. It should absorb any unwanted smells, which will get removed along with the powder. This can be done whenever you need to, however try to use cheap coffee and baking soda from the supermarket; most companies sell cheap home brands which are usually sold in bigger packs to further save...

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Choosing Between Wood, Plastic, and Corrugated Pallets

Posted by on Jun 21, 2016 in Uncategorized |

When investing in pallets for your company, you may not realize that you can choose between wood, plastic, and corrugated or cardboard materials. While pallets may not be very expensive per piece, their cost can add up over time, and you need the right pallet for ensuring your materials arrive safely at their destination. This is why you want to carefully consider the material choices for your supply of pallets. Note a few pros and cons of each so you can determine the best choice for your company. Wood pallets The advantage of wood pallets is that they’re lightweight so they don’t add much to any shipping costs. You can find wood pallets made from recycled wood and also have them easily recycled once their lifespan is over, so they’re an eco-friendly choice. They’re also very affordable, something to consider for one-way deliveries where you are not going to get the pallet back. However, they can get damaged easily, especially if you opt for a very lightweight wood such as balsa, or if they’ve already absorbed moisture from repeated use, which can make the wood soft and prone to breaking. Plastic pallets The advantage of plastic pallets is that they are almost indestructible, so you can use them repeatedly for years without having to replace them. They are also often made with a cup design on the feet of the pallet so they nest in one another; plastic pallets then take up less room for storage. It may also be easier to get plastic pallets in a variety of colors, in case you use any type of color coding system for your items. They are, however, heavier than other pallets so they may add to the cost of shipping and they are probably the most expensive choice. Corrugated pallets Corrugated pallets are made from a type of thick, reinforced cardboard, typically with a honeycomb design in between two layers as you would see in a heavy-duty cardboard box. They can be made from recycled materials and they’re very inexpensive, so they’re a good choice for one-way deliveries. The downside is that they cannot be exposed to excess moisture as the cardboard material will then bend and soften. They need to be protected from the elements especially when going overseas and where the potential for exposure to water is higher. It can also be a challenge to store them and keep them protected, as a warehouse or other facility may not offer a controlled environment with a...

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Top Four Advantages of Perspex Compared to Glass for Greenhouses

Posted by on Apr 11, 2016 in Uncategorized |

If you are building a greenhouse or a cold frame, you can choose between a number of materials to complete your project, and glass and perspex are two of the main materials to consider. Whilst glass is the traditional choice, perspex may offer more advantages. Here are just a few of the advantages perspex offers over glass when it comes to greenhouses. 1. Perspex weighs less than glass. A sheet of perspex is lighter than a sheet of glass. This makes it easier to transport and move materials whilst you are building your greenhouse, but it also makes your final result easier to use. For example, if you have a cold frame with a panel that you can slide open to access your plants, a light sheet of perspex makes the door lighter and easier to open. In contrast, if it were made of glass, it would be heavier. 2. Perspex is stronger than glass. In spite of being lighter, perspex is stronger than glass. If falling fruit, lost birds or other threats hit your greenhouse, they are more likely to cause damage if it is made of glass than perspex. While glass may crack or shatter, perspex has enough flexibility to withstand the blows. 3. Perspex is easier and cheaper to modify. Perspex, or acrylic, is also easier to modify than glass. If you need to add a few ventilation holes to the perspex on your greenhouse, you can drill in those holes without worrying about cracking or chipping the perspex. Alternatively, if you pay someone to modify your perspex sheets so that they fit more easily into your greenhouse, that is typically cheaper than paying someone to cut or modify glass for you. 4. Perspex has great insulating properties. With a greenhouse, you need to use a material that allows light in, but at the same time, you need that material to insulate your greenhouse. A twin wall of acrylic has a R-value of 1.82. This is almost double the R-value of a single pane of glass, which is only .95, and it is almost the same as the R-value of a double pane of glass which is 2.0. However, keep in mind that perspex is lighter and typically less expensive than glass. As a result, in terms of weight and cost, it makes more sense to compare a twin sheet of perspex or acrylic with a single sheet of glass than with a double pane. If you want to learn more about how perspex compares to glass for greenhouses or any other applications, contact a perspex...

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