Department of energy estimates that chillers expend up to 30 percent in additional energy through inefficiency. Maintenance with central plant optimization, service is no longer a set it and forget it proposition. Substituting, h 500 x 40 gpm x 24 degf 480,000 btuhr. Due to new developments in centrifugal chillers with magnetic bearing chillers, and new monitoring technologies, chiller maintenance has advanced significantly. The services of trained and qualified technicians to inspect, adjust, and perform scheduled preventive. Trane introduces advanced control solutions designed to optimize chiller plant performance solutions increase system energy efficiency and reliability, reduce lifecycle costs, optimize plant operations and enable data management, reporting and trending brussels, belgium, june, 20 the chiller plant represents one of the major energy. Chiller plant optimization a practitioners perspective. Commissioning the optimized chilled water plant janelle h. Jci offers responsible refrigerant solutions for numerous applications. Much like with your car, performing daily checks on your chiller can go a long way to preventing a breakdown.
It is important to remember that a chiller selected for low flow does not necessarily have low velocity through its tubes, as discussed in the chapter. In the drive to reduce costs, system maintenance may be cut. Just as central plants have evolved and become more sophisticated over time, so has the role of maintenance. From start to finish, any modular chiller plant takes approximately 20 weeks to design, procure, manufacture, and install with proper coordination. Our central utility plants can meet a range of needs including chilled water, hot water, steam, electricity and other utilities. Regular maintenance keeps chiller efficiency high this website requires certain cookies to work. Industrial chiller maintenance checklist inspection of all water inlets and outlets for leaks should be done routinely. Turbo can provide assistance in locating qualified companies familiar with the. According to the federal governments energy star website, over 35 percent of buildings larger than 100,000 square feet contain chiller plants. Page 2 has a breakdown of all the equipment and their initial cost estimates, along with a. Maintenance checklist maintenance tips schedule maintenance. This cool fluid removes heat from the process and the warm fluid returns to the chiller. Chillers are often the single largest capital asset in a commercial or industrial building.
Turbo does not engineer or design fluid chilling systems, ice systems, ice plants, or processing lines. The chiller is the section of the system where an exchange of heat occurred between the water that goes to the building and the evaporator. For advice about your chiller maintenance or choosing an fgas qualified maintenance partner, call our technical team on 0800 774 7426. The impeller discharges radially into the volute or diffuser 11, which is built into the pump casing. The packaged chiller plant can be provided with a singular power feed, and include other utilities such as domestic hot water, fire protection and additional distribution for other building devices. In this post weve provided an air cooled chiller maintenance checklist as it is the most common design click to jump to a heading. They use approximately 20 percent of the total electrical power generated in north america, and the u. A chiller plant is a centralized system that cools the air for a building or for a collection of buildings and provides the airconditioning portion of hvac systems. A condenser water pump and chemical treatment for the condenser water loop adds to the maintenance required with a watercooled system. An accurate daily log will provide a daily snapshot of the chillers operating characteristics and make abnormal conditions easy to spot. Chiller system preventive maintenance check list inspectionreplacement items and frequency for technical support please contact pro refrigeration, inc.
The tower fan power is substituted by condenser fan power for aircooled systems. Where energy is recovered and used, plant cop can be improved when lift is increased. Vibration analysis can reveal potential bearing and balance. The formula for total heat removed in a chiller installation is h 500 x q x dt where h total heat removed in btuhr, q is the chilled water flow rate in gpm, and dt is the chilled waters total temperature differential. These chillers are providing the needed cooling to the water coming from the load and provided back with the required set point achieved and via several.
Attention to maintenance can help control energy demand. You, as the customer, have control over major equipment vendors including. Aia quality assurance the building commissioning association is a registered provider with the american institute of architects continuing education systems aiaces. The impeller 8 is mounted on the pump shaft 5 with roller bearings 7 in either overhung or center hung arrangement. Chiller plant optimization a practitioners perspective sridhar chidambaram advanced engineering group, engineering services, infosys limited, bangalore, india abstract maintaining optimal energy efficiency in air conditioning systems is a constant challenge one that all heating, ventilation and. Principles of chiller plant design principles of chiller plant design course description. This publication, one of a series dealing with school plant management problems, identifies, describes, shows the function of, and outlines maintenance procedures for many components of school buildings.
While we maintain a wide range of standard designs, we routinely customize plants to match a projects specific requirements. Calculate the chiller capacity in tons of refrigeration. To use this manual effectively, you must first identify your unit model from the unit nameplate. Understanding how your building works to optimize your chiller plant is critical to both the comfort and efficiency of your building or facilities. The attendee will learn hydronics, pump design, condenser water systems, building loads. Check points hvac, chiller check list start unit and observe o eration. This chiller maintenance checklist will help you ensure you catch all of the important areas of your chiller system. Hvac operation and maintenance linkedin slideshare. Evaporator outlet water temperature inlet water temperature 24c 7c 15c 4c differential temperature between inlet and outlet 8c 2. White paper seven steps to maximizing central plant efficiency. Adequate maintenance of school buildings representing a public investment of billions of dollars is a problem of grave concern to both taxpayers and school officials.
During low demand periods, maintenance personnel should become familiar with all areas of chiller care and operation. Proper maintenance is essential to ensure your chiller meets the needs of your. Mhi received an order from singapore district cooling pte, ltd. Refrigeration plant pdf the contents of this book are intended to interest those who are not engaged every day with refrigeration plant but who wish to extend their knowledge on the. C hillers consume more than 50 percent of the electrical usage in many facilities. Operating costs running a cooling system is one of the most signi. An exception to this is the mcquay dual compressor chiller, which operates at its most efficient point at 50% capacity. Components of a comprehensive chiller replacement analysis. Chiller plant design elevation difference column height when pump is off building load 600 tons 50% load secondary pump 1440 gpm 480 gpm flow through decoupler flow two 400 ton chillers each at 300 tons balanced load 51. Central utility plants modular plant design modular. In most process cooling applications, a pumping system circulates cool water or a waterglycol solution from the chiller to the process. Page 1 includes a brief description of the systems analyzed, estimated annual costs for electricity and maintenance, as well as our opinion of probable cost for the equipment in each of the four schemes analyzed.
Chiller maintenance checklist protecting your process. Chiller maintenance during the winter plant, equipment. Your dunhambush package has been manufactured under a careful quality control system. Preventive maintenance check list property address. Installation, operation, and maintenance instruction for. With the integration of the industrial grade controls, the customer. However, watercooled chillers have higher efficiency and therefore lower operational costs. Hvac it is abbreviated as heating, ventilation, and air conditioning system. This course is intended to give the sales engineer and technician a thorough understanding of chiller plant design. Inspect the electrical system including starters, conductors, main feeds and conduits.
Pumping power must be sufficient to create the desired flow at the outlet of the heat exchanger. The modular chiller plant is a selfcontained chilled water production. The chiller maintenance tool that contributes most to a chillers overall efficiency is the daily log. Preventive maintenance contract scope of work for york.
With use of good maintenance practices and water quality control, all of the tubes tested are probably suitable for longtermfouling applications. Being interconnected and grouped together, this mechanical system provides thermal comfort and air quality in an indoor space. Fundamentals of chiller plant design daikin applied. Chilled water air conditioning principles and applications. In addition, the dual compressor chiller offers complete redundancy of all major mechanical components, which resolves another issue with. The results from a case study with a real legacy chiller plant in washington d. Trane introduces advanced control solutions designed to. The process water is the means by which heat transfers from the process to the chiller. The chilled water plant typically consists of one or more chillers usually provided by a plant manager either communicating or noncommunicating that is measuring its internal parameters. Cooling towers, pumps, and air handlers should be checked to see if they will need to be replaced or rebuilt.
This chilledwater is then circulated through the entire building by the use of a pump. Installation, operation, and maintenance instruction for water cooled chiller water cooled chiller manual page 6 item max. All components of the compressor unit should be inspected including checks for oil levels, leaks, vibrations, operating temperatures variations. Further efficiency increases are currently being delivered at the system level. Single chiller plant design does not promote optimal use of the chillers performance.
1523 1433 211 305 1463 82 628 667 1523 88 1568 987 347 1474 1335 1548 588 1159 42 471 297 1187 58 968 1238 216 698 1111