A Comparison of Maintenance Costs, Labor Demands, and System Performance for LID and Conventional Stormwater Management

2015 ◽  
Author(s):  
James J. Houle ◽  
Robert M. Roseen ◽  
Thomas P. Ballestero ◽  
Timothy A. Puls ◽  
James Sherrard
Keyword(s):  
System Performance ◽  
Stormwater Management ◽  
Maintenance Costs

NOX Control Systems: SCR Bypass Systems — 20,000 MW of Case Studies

2004 ◽  
Author(s):  
John M. Brotzman
Keyword(s):  
Pressure Drop ◽  
Abrasive Wear ◽  
Control Systems ◽  
Case Studies ◽  
System Performance ◽  
Power Plants ◽  
Maintenance Costs ◽  
Plant Site ◽  
Nox Control ◽  
Correct Design

Correct design and layout of the SCR BYPASS SYSTEM is critically important to the efficiency and operation of power plants. Utilities have even had to consider closing down plants that could not efficiently operate their Bypass Systems. Numerous gas path configurations are available, which vary considerably based on site and space limitations, construction lifting capabilities and site construction limitations, as well as other key considerations specific to each plant site. This technical paper discusses a number of arrangements, technical selection and layout criteria. This paper discusses case studies and design details of approximately 20,000 MW of successful bypass system equipment which improve system performance, reduce pressure drop, reduce abrasive wear, substantially minimize maintenance costs and simplify operating requirements.

Cost-Effective Dewatering of Municipal Treatment Plant Sludges Using Belt Presses

1990 ◽  
Vol 22 (12) ◽  
pp. 173-182
Author(s):  
W. N. Clarke ◽  
Ed. Hodges ◽  
Robert J. Ooten
Keyword(s):  
System Performance ◽  
Selection Process ◽  
Treatment Plant ◽  
Cost Effective ◽  
Filter Press ◽  
Maintenance Costs ◽  
Capital Costs ◽  
Polymer Addition ◽  
The Past ◽  
Belt Filter Press

An evaluation was conducted at the County Sanitation Districts of Orange County (CSDOC) which led to the purchase and installation of the belt filter presses currently in use. A selection process was made including pre-qualification of bidders after an exhaustive nationwide search and study of all known existing belt filter press facilities. Subsequent methods were employed for purchasing belt filter presses of the same make and manufacturer. Operating experiences and maintenance costs as well as minor modifications which were found to be desirable were documented. The paper will discuss in some detail the design criteria, capacity, polymer addition system, performance at CSDOC Plant No. 1 and Plant No. 2, sludge characteristics and the effect of chemical conditioning. Discussion regarding operation and maintenance criteria, such as staffing, operating and maintenance modes, operational checks, belt life and belt specification, safety ventilation required for the removal of odorous materials and hydrogen sulfide, data recording, and polymer dosing is included. Cost considerations, including capital costs, as well as operating and maintenance costs for the past five years are covered.

Comparison of Maintenance Cost, Labor Demands, and System Performance for LID and Conventional Stormwater Management

2013 ◽  
Vol 139 (7) ◽  
pp. 932-938 ◽  
Author(s):  
James J. Houle ◽  
Robert M. Roseen ◽  
Thomas P. Ballestero ◽  
Timothy A. Puls ◽  
James Sherrard
Keyword(s):  
System Performance ◽  
Stormwater Management ◽  
Maintenance Cost

The relationship of a retinal-gain index to system performance.

1960 ◽  
Author(s):  
S. Seidenstein ◽  
R. Chernikoff ◽  
F. V. Taylor
Keyword(s):  
System Performance ◽  
Relationship Of ◽  
The Relationship

The use of event-related potentials in the enhancement of system performance

1976 ◽  
Author(s):  
Christopher Wickens ◽  
Jack Isreal ◽  
Gregory McCarthy ◽  
Daniel Gopher ◽  
Emanuel Donchin
Keyword(s):  
System Performance ◽  
Event Related Potentials ◽  
Related Potentials

Study of 1024-QAM system performance in the presence of filtering imperfections

1989 ◽  
Vol 136 (2) ◽  
pp. 175-179 ◽  
Author(s):  
P. Mathiopoulos ◽  
H. Ohnishi ◽  
K. Feher
Keyword(s):  
System Performance

Effects of Observer Variation on Performance in Probabilistic Diagnosis of Jaundice

1981 ◽  
Vol 20 (03) ◽  
pp. 163-168 ◽  
Author(s):  
G. Llndberg
Keyword(s):  
Physical Examination ◽  
System Performance ◽  
Transition Matrix ◽  
Bayes Theorem ◽  
Observer Variation ◽  
Kappa Statistics ◽  
Diagnostic Categories ◽  
Number Of Patients ◽  
Probability Transition Matrix ◽  
Probabilistic Diagnosis

A system for probabilistic diagnosis of jaundice has been used for studying the effects of taking into account the unreliability of diagnostic data caused by observer variation. Fourteen features from history and physical examination were studied. Bayes’ theorem was used for calculating the probabilities of a patient’s belonging to each of four diagnostic categories.The construction sample consisted of 61 patients. An equal number of patients were tested in the evaluation sample. Observer variation on the fourteen features had been assessed in two previous studies. The use of kappa-statistics for measuring observer variation allowed the construction of a probability transition matrix for each feature. Diagnostic probabilities could then be calculated with and without the inclusion of weights for observer variation. Tests of system performance revealed that discriminatory power remained unchanged. However, the predictions rendered by the variation-weighted system were diffident. It is concluded that taking observer variation into account may weaken the sharpness of probabilistic diagnosis but it may also help to explain the value of probabilistic diagnosis in future applications.

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