00869nas a2200109 4500008003900000245004400039210004400083260001200127520052400139100002200663856007400685 2013 d00aComplex Fenestration Calculation Module0 aComplex Fenestration Calculation Module c10/20133 a

This document is organized to give you the best possible look into the EnergyPlus calculations. First, the concepts of modeling in EnergyPlus are presented. These include descriptions of the zone heat balance process, air loop/plant loop processes as well as other important processes for the building simulation.

Discussions during the modeling process may reference specific "object names" as found in the Input/Output Reference document.

The remainder of the document focuses on individual models.

1 aKlems, Joseph, H. uhttps://facades.lbl.gov/publications/complex-fenestration-calculation01286nas a2200133 4500008004100000050001400041245009700055210006900152490001600221520079900237100002201036700002001058856007401078 1995 eng d aLBL-3703800aCalorimetric Measurements of Inward-Flowing Fraction for Complex Glazing and Shading Systems0 aCalorimetric Measurements of InwardFlowing Fraction for Complex 0 v102, Part 13 a

This paper presents a calorimetric measurement of layer-specific inward-flowing fractions of absorbed solar energy for a number of geometric configurations common in fenestrations with shading. The inward-flowing fractions are found to be relatively insensitive to exterior conditions. Results for an interior venetian blind over double glazing agree with thermal model calculations in the literature, and are the first layer-specific verification of these calculations. It is argued that a data base of these inward-flowing fractions for a suitably broad class of geometries will make possible the determination of solar heat gain coefficient from non-calorimetric measurements of solar-optical properties of complex fenestration components, a procedure termed solar-thermal separation.

1 aKlems, Joseph, H.1 aKelley, Guy, O. uhttps://facades.lbl.gov/publications/calorimetric-measurements-inward01580nas a2200157 4500008004100000050001400041245008700055210006900142260002500211490001600236520102900252100002201281700002401303700002001327856007501347 1995 eng d aLBL-3703700aA Comparison Between Calculated and Measured SHGC For Complex Fenestration Systems0 aComparison Between Calculated and Measured SHGC For Complex Fene aAtlanta, GAc02/19960 v102, Part 13 a

Calorimetric measurements of the dynamic net heat flow through a complex fenestration system consisting of a buff venetian blind inside clear double glazing are used to derive the direction-dependent beam SHGC of the fenestration. These measurements are compared with calculations according to a proposed general method for deriving complex fenestration system SHGCs from bidirectional layer optical properties and generic calorimetric properties. Previously published optical measurements of the same venetian blind and generic inward-flowing fraction measurements are used in the calculation. The authors find satisfactory agreement between the SHGC measurements and the calculation.

Significant dependence on incident angle was found in the measured SHGCs. Profile angle was not found to be a useful variable in characterizing the system performance. The predicted SHGC was found to be inherently dependent on two angles, although only the incident angle variations were observable under the test conditions.

1 aKlems, Joseph, H.1 aWarner, Jeffrey, L.1 aKelley, Guy, O. uhttps://facades.lbl.gov/publications/comparison-between-calculated-and02537nas a2200181 4500008004100000050001400041245010200055210006900157260003100226520187100257100002102128700002702149700002802176700002202204700002502226700002902251856007502280 1994 eng d aLBL-3573200aA Comprehensive Approach to Integrated Envelope and Lighting Systems for New Commercial Buildings0 aComprehensive Approach to Integrated Envelope and Lighting Syste aPacific Grove, CAc09/19943 a

We define a comprehensive approach to integrated envelope and lighting systems design as one that balances energy efficiency with anequal regard to the resultant environmental quality. By integrating envelope components (glazing, shading, and daylighting), lighting components (fixtures and controls) and building HVAC/ energy management control systems, we create building systems that have the potential to achieve significant decreases in electricity consumption and peak demand while satisfying occupant physiological and psychological concerns.

This paper presents results on the development, implementation, and demonstration of two specific integrated envelope and lighting systems:

  1. A system emphasizing dynamicsenvelope components and responsive electric lighting systems, that offer the potential to achieve energy efficiency goals and a near optimum comfort environment throughout the year by adapting to meteorological conditions and occupant preferences in real time, and
  2. perimeter daylighting systems that increase the depth of daylight penetration from sidelight windows and improves visual comfort with the use of a small inlet aperture.

The energy performance of the systems was estimated using the DOE-2 building energy simulation program. Field tests with reduced scale models were conducted to determine daylighting and thermal performance in real time under actual weather conditions. Demonstrations of these integrated systems are being planned or are in progress in collaboration with utility programs to resolve real-world implementation issues under complex site, building, and cost constraints. Results indicate that integrated systems offer solutions that not only achieve significant peak demand reductions but also realize consistent energy savings with added occupant comfort and satisfaction.

1 aLee, Eleanor, S.1 aSelkowitz, Stephen, E.1 aRubinstein, Francis, M.1 aKlems, Joseph, H.1 aBeltran, Liliana, O.1 aDiBartolomeo, Dennis, L. uhttps://facades.lbl.gov/publications/comprehensive-approach-integrated