Utility System Maintenance

Utility systems for equipment and space heating and cooling frequently use heavy metal corrosion inhibitors in their heat transfer fluids. Chromate compounds are among the best corrosion inhibitors available. Nonchromate inhibitors that have proved to be feasible substitutes include polyphosphates, organophosphates, zinc, molybdates, and aromatic azoles. Some of these compounds have their own environmental impacts, however. Azoles, for instance, can be quite dangerous to human health. 

9 FLUORESCENT AM) MERCURY VAPOR LAMP WASTE MANAGEMENT 

Spent fluorescent lamps and mercury vapor lamps contain mercury in sufficient quantities to be considered hazardous wastes. Recycling facilities exist to recover the mercury content of these lamps. 

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Selection and insteillation of an integrated air pollution control system do not end the concern of the utility industry. Maintenance and operational problems of the system are considered by many engineers to be the weak link in the chain of power generation equipment (6). The reliability of the... 

Engineering factors include (a) contaminant characteristics such as physical and chemical properties - concentration, particulate shape, size distribution, chemical reactivity, corrosivity, abrasiveness, and toxicity (b) gas stream characteristics such as volume flow rate, dust loading, temperature, pressure, humidity, composition, viscosity, density, reactivity, combustibility, corrosivity, and toxicity and (c) design and performance characteristics of the control system such as pressure drop, reliability, dependability, compliance with utility and maintenance requirements, and temperature limitations, as well as size, weight, and fractional efficiency curves for particulates and mass transfer or contaminant destruction capability for gases or vapors. 

Wind Power Plant A group of wind turbines interconnected to a common utility system through a system of transformers, distribution lines and (usually) one substation. Operation, control and maintenance functions are often centralized through a network of computerized monitoring systems, supplemented by visual inspection. This is a term commonly used in the United States. In Europe, it is called a generating station. 

PANELIST CLARK I think we can depend on a greater availability of the gas generator than we are even accustomed to with conventional public utility systems, but that only after a period of time needed to develop a proper maintenance and operating group. Obviously, it is not going to happen the first week, the first month, the first year, or the first two years. But I think we can predict availability for at least that system. 

There should be periodic requalification, as well as requalification after changes (such as changes to utilities, systems, equipment maintenance work and movement). (See also point 5.2.5 above and section 12 below.)... 

Other support facilities such as utility and instrument air systems, steam generation, flare relief systems, maintenance, firefighting, warehouse and administration buildings. 

Installation and maintenance of all utilities systems and components for electricity, water, steeun, gas, oil, compressed air, communications, data networks, etc. 

The impact of corrosion on electric utility systems can be divided into the fraction of utility costs for depreciation, operation, and maintenance that are attributable to corrosion. The estimated costs discussed for this sector are based on detailed analysis of facilities and work activities, using input from Duke Power, an energy company serving more than two million people in North and South Carolina and the Electric Power Research Institute (EPRI) reports, technical literature, and other utilities. 

Once operational gaps are identified, assessment methods (Chapters 5-8 for energy operation. Chapters 12 and 13 for process operation, and Chapter 16 for utility system operation) are then applied to identify root causes— potential causes include inefficient process operation, insufficient maintenance, inadequate operating practices, procedures, and control, inefficient energy system design, and outdated technology. Assessment results are translated into specific corrective actions to achieve targets via either manual adjustments, the best practices, or by automatic control systems. Finally, the results are tracked to measure the improvements and benefits achieved. 

Broughton J (1994) Process Utility Systems Introduction to Design, Operation and Maintenance, Institution of Chemical Engineers (IChemE). 

How can a technician disconnect utility power to service line voltage wiring within racks Where are breakers located, and how are they marked What equipment is on the UPS power, generator, or utility power Whom do you call for power and building systems maintenance ... 

All work on process and utility systems with few and well-defined exceptions require work permits. The supervisor for the work to be done (e.g. maintenance supervisor) should define the job by type of job and affected systems in the application. 

Monolithic materials based on doloma that are used for lining maintenance are typically classified as gunning materials and/or hot patching products. Doloma-based gunning materials are applied when the furnace, ladle, etc. is hot to minimize the potential of hydration. Hot patching materials based on doloma, magnesia, and organic resin systems are also utilized for maintenance of electric fiunace hearths, BOF vessels, and ladles. 

Furthermore, the CMS can be mounted in remote areas to monitor the material as it corrodes, thereby eliminating the need for periodic inspection. Life cycle costs for aircraft, ships, submarines, and electronics systems can be reduced if a proactive maintenance requirement is implemented. This is possible through utilization of real time corrosion condition data generated from such in situ corrosion sensors. A proactive maintenance inspection will permit the tailoring of maintenance scheduling as a Unction of specific operational environment and damage, in contrast to the rigidly scheduled maintenance inspections that currently drive systems maintenance. 

BE-7120 Reliability based decision support system for the maintenance management of the underaround networks of utilities. Prof. T. Hadailacos Computer Tech. Instrtute Patras Uniwerirty... 

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