Heat Detectors  (149)

As more and more countries in Europe and North America commit to net zero, a key strategy is replacing old fossil fuel-driven forms of power generation and replacing them with renewable energy, such as wind turbines and solar panels. The wind industry has seen a particular boom, with tens of thousands of new turbines installed every year across the globe. However, like any other heavy machinery, wind turbines can catch fire due to mechanical or electrical failures. These fires can have impacts beyond the turbine if there is secondary fire spread to surrounding lands, resulting in potentially catastrophic loss. Without this technology in place, a single fire could cost $7-8 million and cause substantial downtime. The time is now for the industry to use all available technology to prevent these incidents and reduce the risk of fires spilling into the environment. How do wind turbine fires start? Wind turbine fires can catch fire due to external causes, such as lightning strikes, or internal causes, such as mechanical or electrical failure resulting in sparks or heat in the nacelle. Most nacelle fires start at one of three points of ignition – converter and capacitor cabinets, the nacelle brake, or the transformer. Nacelle brakes are used to stop the turbine’s blades from spinning in an emergency.  Converter and capacitor cabinets and transformers are necessary for the turbine to generate power and transform it into a voltage that can be exported to the grid. An electrical fault at either location can produce arc flashes or sparks, which can ignite nearby Class A combustibles, like cables, plastics, or fiberglass. Nacelle brakes are used to stop the turbine’s blades from spinning in an emergency. The brakes can cause turbine fires, albeit due to sparks from mechanical stress and friction rather than electrical failure. While some turbines have been designed with safer, electrical brakes, mechanical brake systems are often used as a backup in the event of power or control failure. These ignition points are all necessary for the safe generation of electricity from the wind, and cannot simply be designed out. As such, wind farm owners and operators must be ready to deal with fires when they spark. Why are wind turbine fires hard to fight? Modern wind turbines often exceed 250 feet in height, while most ground-based firefighting can only reach up to 100 feet. A team sent up-tower to manually fight the fire would constitute a major health and safety risk, as turbines have limited space and escape routes – putting employees not only in direct contact with fire but at risk of being in the turbine if it collapses. As such, when turbines catch fire, they are often left to burn out, with firefighters’ efforts focused on preventing the spread and clearing the area as fiery debris falls. This results in irreparable damage to the turbine, necessitating its replacement. What is the cost of a wind turbine fire? The cost of replacing a burned-out wind turbine depends on a number of factors. First and foremost is the size and initial cost of the turbine. Turbines with more than 3MW of rated capacity can cost between $3-10 million to install during development. Replacement turbines can often cost even more, as manufacturers are likely to charge more for individual, one-off installations. Another key loss is business interruption, or how long the turbine was offline – and therefore not generating revenue. The average loss due to a turbine fire was estimated by insurance company GCube to be $4.5 million in 2015. As turbines have grown larger and therefore more expensive to replace with greater losses in revenue, we expect a fire to cost anywhere between $7-8 million for new models. How can turbine owners and manufacturers manage fire risk? Firetrace’s system is designed with flexible Heat Detection Tubing, which ruptures in response to extreme heat or open flame Turbine manufacturers are already taking steps to “design out” fire risk in turbines. For example, lightning protection systems on turbine blades safely re-direct the surge of electricity away from cables, while condition monitoring systems can identify whether a component is overheating and likely to catch fire. In order to put out any turbine fires that do start at their source, turbine owners and manufacturers can install automatic fire suppression systems at common points of ignition. Firetrace’s system is designed with flexible Heat Detection Tubing, which ruptures in response to extreme heat or open flame, releasing a clean suppression agent precisely at the source of the fire before it can spread. Wind farm owners who have taken a more proactive approach to manage risk via fire suppression systems have been able to snuff out fires before they can spread throughout the turbine or into the environment. By investing in the latest technology for fire suppression, owners and operators have avoided the worst-case scenario, saving millions in operating costs.

After years of Brexit negotiations and an ongoing climate of prevailing uncertainty, businesses across the UK are still adjusting to the realities of life outside the European Union. Following the end of the UK’s transition period with the European Union, at the end of last year, the United Kingdom is no longer subject to European laws. However, for many companies, the last-minute nature of the Brexit negotiations mean that they remain unclear on what has actually changed in practical terms, particularly with regard to the day-to-day rules and regulations that govern how they do business. Post-Brexit workplace safety rules Workplace safety rules are likely to be a major source of questions in many cases Workplace safety rules are likely to be a major source of questions in many cases. Have any rules changed as a result of Brexit? Do any of the fire safety standards that were previously in place need to be amended now that EU standards no longer apply in the UK? And is it likely that the UK’s fire safety laws might change in the near future, to reflect the country’s newfound legislative independence? Here, we will explore the answers to these questions, in order to provide you and your business with an insight into what aspects of fire safety might change due to Brexit - and what elements are almost certain to remain the same. What has already changed? In truth, the reality is that so far, very little has changed in terms of how workplace safety regulations are implemented and enforced in the United Kingdom. Although many of the current rules around occupational safety and fire prevention were previously derived from EU directives, the European Union (Withdrawal) Act 2018 has since transposed all of those regulations into UK law, in order to provide as much legal continuity for businesses and communities as possible. Amendments to the supply of new work equipment By enshrining these former EU rules as UK law, the British government is now able to enforce them directly, as well as gaining the ability to adapt or remove them unilaterally in the future. Thus far, the most notable change affecting fire safety standards are the amendments to the manufacture and supply of new work equipment, which have altered the processes that are involved in certifying the safety and quality of equipment, which are used in the workplace. UK-specific UKCA standard Post-Brexit, newly-manufactured equipment will be tested and marked as per new UK-specific UKCA standard Previously, any gear purchased for workplace use needed to bear European CE marking to affirm its conformity to international standards. However, post-Brexit, newly-manufactured equipment will be tested and marked according to the new UK-specific UKCA standard instead. In practice, the impact of this change will not be significant for the time being. Products that conform to relevant European product supply legislation and correctly bear the CE marking will be treated as satisfying the requirements of the relevant UK legislation, until December 31st 2021, and will therefore not require UK marking. This is only likely to change after this date, if future regulatory evolution causes the UKCA and CE standards to diverge. What might change in future? At present, the vast majority of UK legislation on fire prevention and general workplace health and safety, remains in close alignment with EU standards, partly in order to maintain an international consensus on best practice, and to facilitate economic cooperation. However, the stated purpose of Brexit was to provide the UK government with scope to amend and create its own standards and regulations, and as time goes by, it becomes more likely that we will see increasingly significant changes to how fire safety is regulated. For example, in recent months the government has pledged to make a number of updates to the Regulatory Reform (Fire Safety) Order 2005, following a series of inquiries and consultations prompted by the Grenfell Tower fire of 2017. The proposed move could usher in the following changes for all regulated buildings in England, both residential and commercial: When carrying out a fire risk assessment, there will be a new requirement for any person engaged by the responsible person (RP) to undertake any part of the assessment to demonstrate competence. RPs will be required to record their completed fire risk assessments, and the identification of RPs will also be recorded. Penalties for failure to comply with fire safety regulations will increase. Steps will be taken to improve the effectiveness of consultation between building control bodies and fire and rescue authorities on planning for building work, as well as for arranging the handover of fire safety information. As such, businesses should be keeping a close eye on any moves by the government to update its approach to fire safety regulations, and make sure they are ready to make these changes as and when they are needed. What will remain the same? The UK has always been committed to maintaining high standards when it comes to fire safety Although a certain amount of regulatory change is to be expected in a post-Brexit UK, it is also important for businesses to be realistic about what is always likely to stay the same. The UK has always been committed to maintaining high standards when it comes to fire safety, and there is no reason for any organization to allow these standards to slip in the wake of Brexit. No matter what happens in future, you will always be expected to fulfill the following responsibilities: Carry out regular fire safety risk assessments to identify potential fire hazards within your workplace, and then create a plan to eliminate, minimize or manage these risks. Make sure your workplace is properly equipped with fire detection systems and equipment, and maintain them regularly to keep them in proper working order. Keep your fire exits and escape routes clearly marked, well-lit and unobstructed at all times. Invest in fire extinguishers, fire blankets and other equipment to ensure you are able to contain any fires that break out. Provide appropriate training for all of your staff on procedures they should follow in case of fire, including fire drills, as well as getting their buy-in to create a company culture where fire risks are managed and dealt with proactively. Political circumstances may change, but the core principles of workplace fire safety will always remain the same. As such, the best way to ensure your business is properly equipped for the future is to hold fast to these timeless principles, using them as a foundation for future changes and advances as the reality of post-Brexit trading slowly takes shape.

There is a sense in some markets that the paper and pulp industry will decline owing to the digital technologies with which people interact every day. While this might be considered logical, the reality is completely different. In fact, the paper and pulp industry has experienced a steady growth and will continue to do so in 2021. Production of paper increased by more than 450% in the last decades and the demand of paperboard in the world is expected to grow significantly, driven by e-commerce and big retailers increasing their presence in the online sales universe. This sustained growth in production capacity and paper consumption presents several fire risks to companies and exposes communities that develop around paper mills, to the impact of disasters caused by these fire risks. Fire risks in the paper and pulp industry Paper and cardboard are combustible, but this is not the only fire risk found in these types of industries. Raw materials and finished goods storage are sensitive to fire. In addition, the paper making process includes several stages where fires can occur, due to hot surfaces or poor ventilation. The most relevant fire risks on a paper plant are: Storage Areas: As mentioned before, paper and cardboard are combustible. Solid paper blocks and reels have hard surfaces that don’t ignite easily, but usually these reels can suffer minor damages or have loose sheets that significantly increase the fire risk. When paper reels are stacked in columns, gaps in the center can act as chimneys and when fires start in the bottom of the stack, this chimney effect will accelerate smoke and hot air spread, increasing vertical and horizontal flame spread. Wood and Bale storage fire risks Bale storage also presents a high fire risk, as loose materials are always present Raw materials for the paper making process can have two main sources, forestry products (mainly wood) or recycled cardboard and paper. Wood storage presents several challenges, especially due to wood chips that are highly combustible and, in some cases, even explosive. Bale storage also presents a high fire risk, as loose materials are always present. Fire in baled paper is difficult to extinguish and generates heavy smoke. In many recycling facilities, these paper bales are stored outdoors, where paper or rags soaked in flammable liquids, embedded between the paper sheets, can ignite resulting in a fast spreading fire. Chemicals, flammable liquids and gases In addition, it is possible to find different types of chemicals, flammable liquids and gases that are used in the paper making process. These materials have their own fire-related risks that need to be taken in consideration. Production Areas: In pulp factories, there are several long-distance conveyors that transport wood and wood chips. These conveyors constitute a fire risk and the most probable causes of fire are bearing damage, overheating of the conveyor and igniting chips in the environment. IR dryers, a common source of fire After the wood has been transported, chipped and digested, the paper making process becomes extremely humid, due to the large amounts of hot water and steam needed. But, as soon as the pulp fiber sheet starts to dry, the hot surfaces in contact with the paper sheets can be a source of ignition. IR dryers used in the process are also a common source of fire in the paper industry. When the sheet of paper is formed, close contact with reels and bearings moving fast can create static electricity that could ignite loose paper or airborne particles. Problems like these are likely to be more extensive in tissue mills. Paper dust is generated in certain parts of the process, especially where paper shits are slit or cut. Poorly insulated steam pipes lead to fire Poorly insulated steam pipes can ignite paper dust or even their own insulation materials. In addition, paper dust gathers in the ventilation grills of machinery, causing overheating and igniting as well. Heated oil is used in several parts of the process as well and if a malfunction occurs on the Hot Oil Roll systems, leaks might occur, exposing hot surfaces to this oil and causing ignitions. A paper mill has hydraulically operated machinery, where leaks or sprays might ignite as well. Service Areas: As in many other manufacturing facilities, several service areas can be found. Electrical and network equipment rooms have an inherent fire risk due to damaged wires or equipment, overheating or short circuits in high voltage circuits. Transformer and generator areas entail fire risks as well. High fire risk for boiler rooms Flammable gas distribution systems can be ignition sources, in case of leaks or damaged pipes or valves Hot water and steam are key components for the paper making process. For this reason, paper plants use high capacity boilers that can be powered by flammable liquids or gases. A high fire risk can be considered for boiler rooms. Flammable gas distribution systems can be ignition sources, in case of leaks or damaged pipes or valves. In addition to the fire risks mentioned in these areas, many maintenance operations can also pose fire risk, especially when hot works are being performed. Sparks caused by welding or the use of certain tools can ignite paper sheets or dust in the air. Poor housekeeping and buildup of paper dust, for example, increases the risk associated with maintenance and construction works. Prevention, the first line of defense According to the Health and Safety Executive from the United Kingdom, 60% of fires on paper mills are caused by machine faults and poor housekeeping. The first line of defense to avoid fire risks in paper plants is prevention. As mentioned before, a high number of fires in these types of facilities occur because of poor housekeeping and machine malfunction. The key is to identify the risks and possible ignition sources, and apply measures to minimize them. As in many industries, fire protection has two main components: Passive and Active protection. Passive fire protection measures Passive measures include fire rated walls, ceilings, and floors in the most critical areas. Chemical storage areas should be physically separated from other dangerous areas, if this is not possible then the walls separating areas should be fire rated and materials must be stored in a way that minimizes the risk of fire spread by radiation or conduction. Proper compartmentalization and intumescent protection of structural elements should be part of the package as well. Passive measures include proper ventilation and smoke control. As mentioned before, paper dust is a major fire risk, which is why ventilation and cleaning of hoods over the paper machine is important to minimize the possibility of ignition. Fire resisting construction should be designed with the following goals in mind: Protection of escape routes Form compartments to contain fires that might occur Separate areas of higher fire risk Protect load bearing and structural members to minimize risk of collapse Sprinkler systems, gas extinguishing systems and hose reels Active fire protection includes sprinkler systems, gas extinguishing systems and hose reels to support fire brigades Active fire protection includes sprinkler systems, gas extinguishing systems and hose reels to support fire brigades. Finished goods stored indoors should be protected with sprinkler systems and the same should be considered for chemical storage areas and certain raw materials. Paper bales, ideally should be protected by sprinklers that are suitably designed to cope with the height and located, in all cases, 3 meters above the level of bales stacked vertically (which should not exceed 5 meters height). Spark detectors in hoods, pipes and ventilation systems Dangerous sparks could be generated in several parts of the paper making process, which is why spark detectors must be installed in hoods, pipes, and ventilation systems. Water spray and CO2 systems can be used to protect machinery against these risks. Means to fight fires, like extinguishers and hose reels, should be provided to support fire brigades. All the elements should be properly identified and all personnel should be trained and made aware of the location of such devices. Importance of fire alarms Fire alarms are required in all paper mills and fire alarm call points should be provided in all locations, according to international guidelines, such as NFPA 72 or EN54. The spread of flames and smoke in paper, wood and chemical storage might become extremely fast. For this reason, early detection is critical. Many technologies might be applied in the different areas of a paper plant. Nevertheless, there are dusty or humid areas where regular heat or smoke detectors might fail under certain circumstances. For these areas, especially located outdoors, innovative state-of-the-art detection solutions might be applied, like Video Fire Detection (VFD). NFPA 72 standard for flame and smoke detection NFPA 72 provides guidelines to implement this technology for flame and smoke detection NFPA 72 provides guidelines to implement this technology for flame and smoke detection, opening interesting alternatives for designers and fire protection engineers. Many EHS managers and fire protection professionals selected VFD, because it is the only fire detection solution that effectively covered their needs. Many engineers, specialized in fire protection for paper plants, explained that they tested linear heat detection, aspiration smoke detection, IR/UV detectors and even beams, but none of these technologies performed as they needed on the dirtiest or more humid areas. Video Fire Detection (VFD) solutions Outdoor storage areas are often unprotected, because deploying flame or heat detection in large open areas can be costly and mostly ineffective. VFD solutions can detect smoke and flames in outdoor conditions, allowing the monitoring and protection of wood and paper bales in large areas. Fire detection and alarm systems should be designed with the following goals: Minimize risk of fires, including the use of fire detection technology in areas where regular detection technologies cannot be implemented or are not practical. Minimize risk of flame and smoke spread, with state-of-the-art detection algorithms that guarantee fast and effective detection. Also, reliable algorithms minimize the possibility of nuance or unwanted alarms. In case of a fire, fast detection gives occupants life-saving time to reach to a place of safety, before the flames and smoke have spread to dangerous levels. Global production of paper and pulp reached 490 million tons in 2020, with many industries and markets depended on the paper and pulp supply chain. That is why innovative ways to protect this supply chain, are key to sustain the paper market growth in the future.