Integrated control and safety systems design considerations to guarantee IEC61508 / IEC61511 compliance throughout the lifecycle

2015 ◽  
Author(s):  
N.A. Alonso
Keyword(s):  
Integrated Control ◽  
Systems Design ◽  
Design Considerations ◽  
Safety Systems

scholarly journals Curtain Wall with Solar Preheating of Ventilation Air. Full Scale Experimental Assessment

2020 ◽  
Vol 172 ◽  
pp. 09007
Author(s):  
Roberto Garay-Martinez ◽  
Beñat Arregi
Keyword(s):  
Natural Ventilation ◽  
Integrated Control ◽  
Substantial Reduction ◽  
Systems Design ◽  
Full Scale ◽  
Curtain Wall ◽  
Smart Control ◽  
Scale Experiment ◽  
Ventilated Facade ◽  
Ventilation Systems

Heating load in Commercial buildings is highly related with ventilation systems, while at the same time local discomfort in the vicinity of glass walls occurs due to overheating. In this paper, a novel double envelope curtain wall is presented, which extracts heat from the façade by means of a ventilated cavity which is then incorporated to the ventilation air intake. A substantial reduction of heating loads is achieved. Whenever solar gains are not sought, a bypass element allows the natural ventilation of this air cavity, acting as a ventilated façade. An integrated control system with embedded electronics and actuators allows for a smart control of the system. The system is designed for integration with existing rooftop ventilation systems. Design considerations are discussed, and the outcomes of a full-scale experiment conducted in Bilbao (Spain) along 2019 presented.

Water Gauge, Flue Plate Stiffeners, and Insulation Systems Design Considerations

2003 ◽  
Author(s):  
Gary J. Bases
Keyword(s):  
Air Pollution ◽  
Catalytic Reduction ◽  
Systems Design ◽  
Design Considerations ◽  
Reduction System ◽  
Plate Design ◽  
Gauge Pressure ◽  
Insulation Systems ◽  
Insulation Thickness ◽  
Design Calculations

Tremendous money is wasted due to the lack of attention to the water gauge and flue plate stiffeners, and their impact on the insulation and lagging design. The design and installation of an insulation and lagging system will depend heavily upon the flue or duct stiffener arrangement. The stiffener arrangement is determined by many factors including the water gauge of the flue or duct plate design. The stiffener pattern and size is the first thing you consider when designing an insulation and lagging system. Therefore, it is imperative to understand how the size, shape and pattern of the external stiffeners are developed. The stiffener sizing of yesterday was based on a much lower water gauge pressure and allowed the insulation to be placed between the stiffeners without having to cut-to-fit. The stiffeners being designed today are quite large and much farther apart. This is due in part to the water gauge number being used in the design calculations and because they have not considered the required insulation thickness and application. A well designed and installed insulation and lagging system will save money and energy at a rate that is essential for an efficient plant operation. This is especially true when adding a selective catalytic reduction system (SCR) or a selective non catalytic reduction system (SNCR) to the back end of a steam-generating unit. The insulation and lagging system is critical for these air pollution systems to operate correctly.

HULLFORM & HYDRODYNAMIC CONSIDERATIONS IN THE DESIGN OF THE UK FUTURE AIRCRAFT CARRIER (CVF)

2021 ◽  
Vol 159 (A4) ◽  
Author(s):  
M E Campbell-Roddis
Keyword(s):  
Systems Design ◽  
Aircraft Carrier ◽  
Design Considerations ◽  
Final Design ◽  
And Performance ◽  
Team Design ◽  
The Uk ◽  
Requirements Development ◽  
Design Proposal ◽  
Evaluation Work

An overview is provided of the manner in which hydrodynamic and hullform-related design considerations were addressed in the development of the BAE SYSTEMS team’s design proposal for the UK Future Aircraft Carrier (CVF). It also outlines how broader design considerations such as aviation, survivability and supportability requirements influenced these aspects of the design. A summary is also provided of some of the more detailed requirements development, option assessment and performance evaluation work that has been undertaken. The aircraft carrier designs discussed in this paper correspond to the BAE SYSTEMS team’s final design submission as it stood in January 2003, at the time it was discontinued by the UK Ministry of Defence, in favour of the rival Thales / BMT team design that has since been developed into the UK Royal Navy’s new ‘Queen Elizabeth’ class aircraft carrier. This final BAE SYSTEMS design submission consisted of two distinct design variants - one configured to operate a CTOL-based air group, the other configured to accommodate a STOVL air group. Both variants were based on a common ‘core’ ship design. The discussion presented in this paper is applicable to both variants.

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