An energy efficient HVAC system and a effectively run preventative Maintenance program for heating and cooling operations, present energy effectivity, gear longevity and decrease utility payments. A building that is too warm or cold, or an electricity invoice that is simply too excessive, is unhealthy enterprise and creates questions from each management and tenants.
Many people overlook the function a clear cooling tower plays in the efficiency and energy effectivity of a building’s cooling system. In a typical constructing, the HVAC system accounts for about 45 p.c of utility prices, with the chiller being the only largest consumer of electricity. Since chillers use about five instances the energy of the cooling tower, extra attention is usually paid to the chiller. However, sustaining a clean cooling tower is equally vital in the energy efficiency equation. Since cooling towers are efficient air washers, they require regular cleansing to take away dust, pollen, insects and different debris captured because the tower water falls by the air stream. These contaminants are carried via the tower fill and tend to settle in the basin where they contribute to an array of issues. Basin deposits present a super environment for the expansion of microorganisms that can cause severe beneath-deposit corrosion and even premature basin failure. These deposits can lead to critical corrosion with seen rust spots in mere months with holes showing shortly thereafter. Basin deposits also increase water treatment prices by absorbing the remedy chemicals being used in the tower, thereby making the treatment program much less efficient. A dirty sump also can contribute to scale deposits, algae and/or microorganisms actively growing within the system. Some microorganisms can pose a health danger to upkeep personnel and passersby, especially if launched from the tower in the type of aerosols.
Cleaner Equals Vitality Effectivity
Proper chemical remedy of the tower water will keep dissolved solids, corresponding to calcium carbonate, in answer and transferring through the cooling tower and the chiller condenser bundle with out attaching to the metals to create scale deposits. Nevertheless, where spray of the water and air meet, the solids will dry and kind deposits, normally to the surface edges of the fill, mist eliminators and/or inlet air louvers. As the deposits develop they’ll restrict and/or divert water and air circulation and change into counterproductive to the pure evaporation of the cooling tower. These deposits should be removed often to keep the tower system working effectively. Cooling towers that have plugged, missing or improperly operating nozzles and/or are dirty don’t cool water as effectively as clean correctly-functioning cooling towers. Proper water distribution and spray patterns are vital to cooling tower effectiveness and, in the end, to the product being cooled. For instance, a fluid cooler, which is quite common in some applications, could have a closed loop heat exchanger cooled by the water sprayed from the cooling tower water distribution system. If for any motive the distribution of air and/or water will not be properly functioning, the heat exchanger temperature will rise reducing the efficiency of the gear being cooled. Fouled air inlet louvers, fill and spray nozzles also reduce heat switch and require tower fans to function longer to supply the required condenser water temperature. Clogged suction strainers reduce condenser water stream and chiller capacity. Chiller effectivity is lowered if the design condenser water temperature cannot be equipped. For every 1°F the condenser water provide temperature rises above design, chiller effectivity is reduced by 2 percent. To compound the problem, accumulated tower debris delivered to the chiller with the condenser water contributes to condenser fouling, which further reduces chiller efficiency.
Designing a Maintenance Program for Cooling Towers
Routine cooling tower cleaning and chlorination is essential preventative maintenance to avoid these issues. Most cooling tower manufacturers advocate that cleansing and chlorination be accomplished no less than twice a 12 months. Nevertheless, each facility engineer should design a upkeep program for his or her facility that will insure correct care of the associated equipment. If the cooling tower is correctly cleaned at the correct intervals, the advantages are multi-fold, saving facility dollars in vitality utilization, repair prices and premature gear alternative prices.
Proper cleansing protocol involves:
Cooling tower cleaning is commonly neglected or carried out improperly. It’s a labor intensive course of that requires expertise and coaching to accomplish appropriately. Specialized gear and procedures are necessary to successfully perform the work. The chlorination procedure, which helps cut back risks from waterborne pathogens, requires careful application and control. The louver and fill cleaning process, which helps maintain good air flow and heat switch within the tower, requires specialized cleaners and application gear. Workers must wear the proper personal protective gear (PPE) to avoid chemical and microbiological hazards. Depending on the tower design and site, specialised gear could also be required to safely entry spray nozzles, air inlet louvers and fill. Many constructing house owners do not need the in-house sources to properly carry out tower cleanings and select to contract with an outside firm for this work. Using the services of a certified cooling tower cleaning firm offers assurance that the work is carried out safely and business acknowledged procedures are adopted. Documentation ought to be supplied outlining the cleansing and chlorination procedures and the outcomes of each job. When considering a cooling tower cleaning firm, keep in mind some contractors solely physically clean the basin and their companies don’t include chlorination or louver/fill cleansing. Routine cooling tower cleaning and chlorination is an important, value-effective preventative maintenance apply that helps scale back vitality costs by keeping cooling towers and chillers working at peak effectivity. Clean cooling towers additionally last longer and operate more reliably. Whereas usually overlooked by operations managers, a upkeep routine for these systems is an funding that will pay off many times over in terms of power effectivity price savings and constructing security.