Operations and Maintenance Best Practices--A Guide to Achieving Operational Efficiency

Abstract

Case Study Comparison of Four Maintenance Programs (Piotrowski 2001) Reactive Maintenance (Breakdown or Run-to-Failure Maintenance) O&M Best Practices 7.1 O&M Best Practices 7.35 O&M Best Practices 7.55 O&M Best Practices 7.81Building envelope -The exterior surfaces of a building that are exposed to the weather, i.e., walls, roof, windows, doors, etc.Celsius (Centigrade) -The temperature at which the freezing point of water is 0 degrees and the boiling point is 100 degrees at sea level.Centrifugal fan -A device for propelling air by centrifugal action.cfm -Cubic feet per minute usually refers to the volume of air being moved through an air duct.O&M Best Practices A.1Chiller -A refrigeration machine using mechanical energy input to drive a centrifugal compressor to generate chilled water.Coefficient of performance -Ratio of tons of refrigeration produced to energy required to operate equipment.Coefficient of utilization -Ratio of lumens on the work surface to total lumens emitted by the lamps.Cold deck -A cold air chamber forming a part of an air conditioning system.Combined wastewater -A facility's total wastewater, both graywater and blackwater.Color rendering index (CRI) -The color appearance of an object under a light source as compared to a reference source.Condensate -Water obtained by charging the state of water vapor (i.e., steam or moisture in air) from a gas to a liquid usually by cooling.Condenser -A heat exchanger which removes heat from vapor, changing it to its liquid state. In refrigeration systems, this is the component which rejects heat.Conduction -Method of heat transfer in which heat moves through a solid.Convection -Method of heat transfer in which heat moves by motion of a fluid or gas, usually air.Cooling tower -A device that cools water directly by evaporation.Damper -A device used to limit the volume of air passing through an air outlet, inlet, or duct.Degree days -The degree day for any given day is the difference between 65 degrees and the average daily temperature. For example, if the average temperature is 50 degrees, the degree days is 65 -50 = 15 degrees days. When accumulated for a season, degree days measure the severity of the entire season.Demand load -The maximum continuous requirement for electricity measured during a specified amount of time, usually 15 minutes.Demand factor -The ratio of the maximum demand of a system to the total connected load on the system.Double bundle chiller -A condenser usually in a refrigeration machine that contains two separate tube bundles allowing the option of rejecting heat to the cooling tower or to another building system requiring heat input.Dry bulb temperature -The measure of the sensible temperature of air.Economizer cycle -A method of operating a ventilation system to reduce refrigeration load. Whenever the outside air conditions are more favorable (lower heat content) than return air condi tions, outdoor air quantity is increased.Efficacy -Ratio of usable light to energy input for a lighting fixture or system (lumens per watt)A.2 O&M Bes...

Reliability Model of MMC Considering Periodic Preventive Maintenance

“…The discount rate is set 10%, and the rated lifetime of the SM is set 25 years. Thus the UAV of an SM is 2.975k$ obtained by (31). The cost of one maintenance is set 60k$ for an offshore case [32].…”

“…It is practical, easy and do not rely on other technology compared with other common maintenance programs, such as predictive maintenance and reliability centered maintenance [31]. In addition, it is especially suitable for offshore cases for the following reasons.…”

Development of Standardized Component-Based Equipment Specifications and Transition Plan into a Predictive Maintenance Strategy

“…Predictive maintenance is similar to preventive maintenance in that you identify components to be replaced based on a schedule meant to reduce downtime for critical equipment. Predictive maintenance goes a step further by identifying Prevention maintenance is referred to as Reliability Centered Maintenance (Sullivan, Pugh, Melendez, & Hunt, 2010). Prevention maintenance is a hybrid of the first three maintenance types.…”

Detection and Severity Classification of Rotor Imbalance Faults in Induction Machines

“…Reactive maintenance is basically a 'run till it fails' type of strategy where no maintenance is done till the equipment stops functioning. Majority of industries still follow this strategy [1]. At first glance, this choice may seem obvious since no maintenance cost is incurred till the equipment is replaced.…”