Achieving daylighting credits for LEED: Glossary and definitions

Explaining precise meanings for terminology when analyzing daylighting in AGi32.

06/20/2013


Clear sky: A sky that has less than 30% cloud cover. 

Equinox: Time of equal day and night. Either of the two annual crossings of the equator by the sun, once in each direction, when the length of day and night is approximately equal everywhere on Earth. The equinoxes occur around March 21 and Sept. 21. 

Fins: The vertical equivalent of an overhang. They are positioned alongside a window and help to block direct sunlight when the sun is low in the sky. On an east or west exposure, fins can be effective in the morning (east) or late in the evening (west) during the summer and winter months.

Overcast sky: A sky that has more than 70% cloud cover. 

Overhangs: The principal method for eliminating direct sunlight from a vertical window. They are particularly effective on the south face of a building.

Partly cloudy sky: A sky that has 30% to 70% cloud cover. 

Solstice: Longest or shortest day. Either of the times when the sun is farthest from the equator, on or about June 21 or Dec. 21. The summer solstice falls in June in the northern hemisphere and in December in the southern hemisphere and vice versa for the winter solstice. 

Sun path diagram: Tells us where the sun will be on any given date and time for a given location. 

Visible transmittance (VT): Daylight transmittance is the percentage of visible light striking the glazing that will pass through. 

Courtesy: AGI website (www.agi32.com)



No comments
The Top Plant program honors outstanding manufacturing facilities in North America. View the 2015 Top Plant.
The Product of the Year program recognizes products newly released in the manufacturing industries.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
World-class manufacturing: A recipe for success: Finding the right mix for a salad dressing line; 2015 Salary Survey: Manufacturing slump dims enthusiasm
2015 Top Plant: Phoenix Contact, Middletown, Pa.; 2015 Best Practices: Automation, Electrical Safety, Electrical Systems, Pneumatics, Material Handling, Mechanical Systems
A cool solution: Collaboration, chemistry leads to foundry coat product development; See the 2015 Product of the Year Finalists
Digital oilfields: Integrated HMI/SCADA systems enable smarter data acquisition; Real-world impact of simulation; Electric actuator technology prospers in production fields
Special report: U.S. natural gas; LNG transport technologies evolve to meet market demand; Understanding new methane regulations; Predictive maintenance for gas pipeline compressors
Cyber security cost-efficient for industrial control systems; Extracting full value from operational data; Managing cyber security risks
Getting ready for industrial IoT; Visualizing the (applied) automation continuum; Preventing VFD faults and failures; Using wireless for closed-loop applications
Migrating industrial networks; Tracking HMI advances; Making the right automation changes
Understanding transfer switch operation; Coordinating protective devices; Analyzing NEC 2014 changes; Cooling data centers

Annual Salary Survey

After almost a decade of uncertainty, the confidence of plant floor managers is soaring. Even with a number of challenges and while implementing new technologies, there is a renewed sense of optimism among plant managers about their business and their future.

The respondents to the 2014 Plant Engineering Salary Survey come from throughout the U.S. and serve a variety of industries, but they are uniform in their optimism about manufacturing. This year’s survey found 79% consider manufacturing a secure career. That’s up from 75% in 2013 and significantly higher than the 63% figure when Plant Engineering first started asking that question a decade ago.

Read more: 2014 Salary Survey: Confidence rises amid the challenges

Maintenance and reliability tips and best practices from the maintenance and reliability coaches at Allied Reliability Group.
The One Voice for Manufacturing blog reports on federal public policy issues impacting the manufacturing sector. One Voice is a joint effort by the National Tooling and Machining...
The Society for Maintenance and Reliability Professionals an organization devoted...
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
Maintenance is not optional in manufacturing. It’s a profit center, driving productivity and uptime while reducing overall repair costs.
The Lachance on CMMS blog is about current maintenance topics. Blogger Paul Lachance is president and chief technology officer for Smartware Group.
This article collection contains several articles on the vital role that compressed air plays in manufacturing plants.