Evaporator Coils - Expert Commentary

Cooling Tower Cleaning And Preventive Maintenance Reduces Energy Costs
Cooling Tower Cleaning And Preventive Maintenance Reduces Energy Costs

A cooling tower allows building owners and operators to take advantage of low cooling water temperatures and higher rates of heat rejection per square meter inherent in evaporative cooling systems. A well maintained cooling tower enables cooling systems to perform at optimum efficiency, reliably and cost-effectively, with contractors who maintain cooling systems able to service their customers with comprehensive and routine cooling tower maintenance programs that should maintain cooling performance for many years. Humble cooling tower Unfortunately, the humble cooling tower is often the forgotten component of the water cooling system when it comes to maintenance, but extremely high up the table when it comes to safety, so while certain tasks are regularly carried out others can be overlooked. A well maintained cooling tower should be able to reliably deliver its design fluid temperature A well maintained cooling tower should be able to reliably deliver its design fluid temperature and flow rate relative to the ambient condition indefinitely, but since its heat transfer operation creates a natural ‘air-scrubber’ environment, removing impurities from the cooling air as well as the circulating water, the cooling tower needs regular routine inspections and maintenance to continue performing at its best, and a small deterioration in performance should be expected, but easily managed. Cooling towers use large volumes of ambient air to take heat away from a process through sensible and non-sensible cooling. Critical maintenance activities Non-sensible cooling is a term that describes heat rejection through evaporation, where air will gain moisture until it reaches saturation, which is when the air is fully laden with water at 100% RH. This increase in water content requires energy to occur and this is obtained by taking heat out of the circulating water, reducing the temperature of the water in the process. Sensible cooling also occurs, which is where the colder inlet air reduces the temperature of the water due the difference in the air and water temperature, and in turn heats up as it travels through the heat exchange media. Because of this, one of the most critical maintenance activities of cooling systems is to ensure that the heat transfer has the best conditions to occur. Air moving equipment Maintenance on the air moving equipment will focus on the condition of the fans themselves The best conditions mean that the airflow is optimal, the heat exchange surfaces are clean and correctly installed, and the water distribution is balanced and operating correctly. Unless it is a natural draft cooling tower, the airflow will be created by fans which are driven by motors that are either directly attached to the fans or operate through gearboxes or fan belts. Maintenance on the air moving equipment will focus on the condition of the fans themselves, ensuring that the blade angles are set to achieve the necessary airflow if they can be adjusted and that the gearboxes or belts are operating properly with sufficient lubrication in bearings and gearboxes. Heat exchange media The heat exchange media in the cooling tower should be selected to offer the best trade-off between the tendency to foul and the amount of heat exchange surface. Maintenance on these components focuses first on the cleanliness of the heat exchange surfaces, as well as ensuring that the correct type of heat exchange media is being used and that it is properly fitted. The distribution systems in cooling towers are also essential to efficient operation Incorrect fill type or poor installation can lead to the packs becoming blocked quickly or could result in higher pressure drops reducing airflow. Poorly fitted fill packs can lead to air bypassing the water through gaps in the fill pack and results in loss of thermal performance and higher drift rates. The distribution systems in cooling towers are also essential to efficient operation. Heat exchange surfaces Heat exchange surfaces are only effective if there is a steady flow of water over them, blocked or broken nozzles can lead to an imbalance of water flow which results in variations of wetting rates or even dry spots throughout the fill where the airflow will be less effective. Water flow, airflow and heat exchange surface are the essential ingredients in cooling tower thermal performance, but these three critical subsystems don’t make up the entire system. The remaining systems are related to safety, access and containment, which carry a significant importance when concerned with the safe and effective operation of a cooling tower. Preventing direct sunlight Cooling towers are ultimately maintainable through a series of interconnected subsystems These systems include drift eliminators that prevent harmful water droplets from leaving the cooling tower, air inlet honeycombs that prevent direct sunlight from entering the cooling tower and reduce airside contamination, access systems that allow safe access for maintenance and the general fabric of tower to provide containment of fluids and protection to operators. All these things should be considered in a comprehensive maintenance plan which goes beyond cleanliness to ensure that you have not only a safe system but a high performing system. Cooling towers are ultimately maintainable through a series of interconnected subsystems that can all be relatively easily and cost effectively replaced. By allowing correctly maintained systems to operate at peak efficiency, they will work safely for many years.

HVAC Maintenance Vital As Businesses Reopen Post COVID-19
HVAC Maintenance Vital As Businesses Reopen Post COVID-19

In what can only be described as a very turbulent year, many businesses have had to shut their doors and have all but forgotten about the general upkeep of their sites. With priorities shifted to keeping companies afloat and staff employed, maintenance and servicing has taken a backseat, and many systems will be deteriorating unnoticed. It goes without saying that one of the first tasks that employers will have to tackle when returning to work is a deep clean. As we are still in the throes of a pandemic, a clean and disinfected workplace is the number one priority that needs to be ensured, before any staff can be welcomed back to work. This should be closely followed by maintenance of the site’s equipment. Importance of regular HVAC maintenance Regular HVAC maintenance is extremely important as it keeps systems performing efficiently and effectively Regular HVAC maintenance is extremely important as it keeps systems performing efficiently and effectively. The nature of HVAC maintenance does change depending on the time of year, and with some sites being shut for months and through different seasons, managers will need to review their current equipment to ensure it is compliant and working correctly as soon as possible as signs of normality start returning and facilities begin to reopen. While warehouses and factories may have still been operating in some capacity over the last 12 months, many office buildings have seen little to no employees for more than a year in some cases, therefore, risking deterioration and even damage to their systems going unnoticed and untreated. But with so many pieces of equipment at each site, it is often hard to know where to start and what to prioritize. Following HVAC manufacturer’s recommendations In order for businesses to keep functioning as best as they can and to avoid any more disruption, those in charge of maintenance and servicing need to be educated on how the conditions of a system affects the type of work it needs. Manufacturer’s recommendations should also be taken into account. To help define what these are and how to approach them, mechanical and electrical engineers recommend: The coils and pipes in HVAC equipment that are responsible for heat transfer are checked regularly, because if the equipment gets dirty, it won’t transfer heat and energy as well. Checking controls annually to ensure that the HVAC system is running properly, as control calibration can alter. By scheduling regular check-ups, accurate operation is maintained. Maintaining equipment with fans quarterly to maximize longevity. Three key areas include monitoring the impellers, belts and bearings for any dirt, wear and tear, friction or erosion. Keeping an eye on filters, as when they are clogged, it increases the pressure drop in a system, which makes fans work harder to maintain the same airflow. A quarterly clean is usually sufficient for most filters. This is also true of strainers in systems. Optimizing HVAC and electrical equipment With spring now upon us, businesses need to optimize their HVAC and electrical equipment for maximum efficiency With spring now upon us, businesses need to optimize their HVAC and electrical equipment for maximum efficiency. This includes reviewing the sequence of operations for a morning warm up and cool down. However, it’s important to remember that because of prolonged closures over the last 12 months, autumn and winter checks, and in some cases, even summer checks were not able to be carried out in 2020, so before the spring work begins, backdating the maintenance is a good place to start. Ensuring buildings’ energy efficiency With the help of experts, HVAC maintenance doesn’t have to be time-consuming and overwhelming, but it’s a critical part of maintaining an energy-efficient building that is both comfortable and reliable. With regular servicing and some basic knowledge of what is required, sites can maintain optimum efficiency all year round. Noise complaints can also be an issue, if HVAC maintenance isn’t carried out regularly. Spring is a good time for businesses to perform services on their equipment, prior to the summer months starting and should be used to ensure that condenser coils and air handler filters are both clean. The dirtier the equipment, the noisier and less efficient it becomes, which is bad news for any business. Preparing buildings for staff returning to work When a building is returning to normal occupancy after a lengthy closure, additional checks must be considered before reopening is discussed. When a building is initially mothballed, it must be prepared for long term vacancy, but many businesses will not have had this opportunity before the national lockdown, which basically entails that these checks will not have been carried out. After a building becomes unoccupied, it is not the case that maintenance activity should also stop After a building becomes unoccupied, it is not the case that maintenance activity should also stop. At the very least, the frequency of existing planned maintenance will change, but in some cases, more maintenance tasks are required in order to keep the site ticking over. This includes flushing of water systems, Legionella testing and insurance inspections to keep the property functional and compliant. Countering health and safety issues  As the COVID-19 lockdown restrictions are lifted across the United Kingdom and many businesses are gradually reopening, it will present health and safety problems that have not been faced before and will very likely see a surge in services and maintenance being required. With this in mind, it is vital that maintenance becomes a priority as normal service is resumed to not only ensure efficiency, but also to make sure that no employee or visitor to a site is put in danger. Emerging from a surreal 12 months, there is no doubt that companies will still face challenges, so it is crucial that avoidable maintenance problems do not become one of them, so don’t delay in booking routine checks.  

Latest Bryant Heating & Cooling Systems news

Bryant Heating & Cooling Systems Announces Dealer Of The Year
Bryant Heating & Cooling Systems Announces Dealer Of The Year

Peterman Brothers of Greenwood, Indiana has been named the 2021 Bryant Dealer of the Year, the highest honor a Bryant dealer can receive. Each year, this award recognizes the company whose hard work, expertise and business acumen have helped them to stand out as a leader in the industry. Bryant, a pioneering supplier of heating, ventilating, and air conditioning (HVAC) equipment, is a part of Carrier Global Corporation, the pioneering global provider of healthy, safe and sustainable building and cold chain solutions. “Being named as the 2021 Bryant Dealer of the Year means that we are doing things the right way,” said Chad Peterman, Owner and President, Peterman Brothers. “It is not what we do, but how we do it. We are committed to providing our people and customers with the best customer experience possible.”   Bryant Medal of Excellence winner   Peterman Brothers has been solving plumbing, heating, and cooling issues of the central Indiana community since 1986 when Pete Peterman started the company in his garage. Since its humble beginnings, the company has grown to employ over 300 people today. Two of those employees include Pete's sons, Chad and Tyler. Both grew up around the business and have taken on numerous responsibilities.   Chad is the oldest and in his role as Owner and President, he is responsible for creating and executing the company’s vision and long-term strategy. Chad’s younger brother, Tyler, oversees all install operations. Peterman is now a complete family affair with all the Petermans involved in the day-to-day operations of the company. In addition, Peterman Brothers is a two-time Bryant Medal of Excellence winner.   Bryant Factory Authorized Dealers “Bryant dealers continue to raise the bar in our industry and are among the best in the business,” said Justin Keppy, President, NA Residential & Light Commercial, Carrier. “Our 2021 Dealer of the Year, Peterman Brothers, exemplifies the values and commitment that the Bryant brand has come to represent in its more than 115-year history. Its entire team embodies all that is necessary to run a successful business, and the company serves as an example to the industry for how an organization should treat its customers and the community in which it operates.” Bryant selected its 2021 Dealer of the Year from 22 Medal of Excellence winners, comprised of Bryant Factory Authorized Dealers throughout North America. The candidates were judged on overall sales growth, high-efficiency and indoor air quality equipment sales, customer satisfaction and participation in dealer programs and promotions.

New Bryant Home App Provides Enhanced User Experience for Remote Connectivity to Evolution System
New Bryant Home App Provides Enhanced User Experience for Remote Connectivity to Evolution System

Bryant has launched the new Bryant Home app, which provides homeowners with an improved experience managing their Evolution™ System. This replacement for the MyEvolution Connex app, which is available now in the Apple® App Store® and Google Play® store, provides an enhanced homeowner experience, improved functionality and increased connectivity performance between the mobile device and home comfort system.   Bryant, a pioneering supplier of heating, ventilating, and air conditioning (HVAC) equipment, is a part of Carrier Global Corporation, the pioneering global provider of healthy, safe and sustainable building and cold chain solutions. While the Bryant Home app has a new look and improved performance, it still includes many of the features and benefits homeowners were accustomed to with the previous MyEvolution Connex app. Homeowners will be able to control their entire advanced home comfort system to precisely manage the temperature, humidity and equipment efficiency.1 In addition, homeowners will be able to learn more about the outdoor air quality around their home, including the air quality index and the pollutant levels in the atmosphere. Bryant Home app The new Bryant Home app runs on a Carrier IO platform, which provides a solid backend and cloud platform to build robust IoT applications. This app represents the latest step in Carrier’s digital transformation journey as its residential business reinvents its holistic digital footprint. “We’re proud to introduce the Bryant Home app to residential customers,” said Gundeep Singh, Executive Director, Digital and Analytics, NA Residential & Light Commercial, Carrier.   “Homeowners will enjoy the enhanced performance that better allows them to conveniently manage their home comfort settings from anywhere. This is the next progression in our digital transformation and we look forward to offering homeowners a new level of functionality as we continue to add new features and product compatibility.”

Bryant Heating & Cooling Systems Unveil Updated Smart Sensor For Their Evolution Zoning System
Bryant Heating & Cooling Systems Unveil Updated Smart Sensor For Their Evolution Zoning System

Bryant Heating & Cooling Systems (Bryant) launched an updated zoning sensor to be used with its flagship Evolution Zoning System. The sensor provides homeowners with a wall control featuring a new, contemporary design, with the ability to control an individual zone in the home’s Evolution zoning system. Bryant, an international supplier of heating, ventilating, and air conditioning (HVAC) equipment, is a part of Carrier Global Corporation, a renowned global provider of healthy, safe and sustainable building, and cold chain solutions. Smart sensor The new look of the smart sensor also mimics the look of the Evolution Connex Control The new smart sensor was designed with the home owner in mind. Smaller than the previous generation of sensors, the sensor features a touchscreen with an updated look and feel that blends easily into the décor of many homes better than ever before. The new look of the smart sensor also mimics the look of the Evolution Connex Control, so as to help maintain a uniform appearance throughout the house. Evolution Zoning System In addition, the new smart sensors highlight the innovation behind the Evolution Zoning System, by providing an easy-to-read temperature display and intuitive controls. Homeowners also can adjust the fan and hold settings for each zone, as well as monitor the humidity levels and outdoor temperature. “The new smart sensors offer a sleek new look for our homeowners, with the functionality that is expected with the Evolution System,” said Frank David, Product Manager, Residential Thermostats and Controls at Carrier Corporation. Frank David adds, “The new touch-screen design will resonate with homeowners as it echoes many contemporary device interfaces. In addition, each sensor is smaller than previous generations, so they will be less intrusive to the home décor.”

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