Pearl Building Rating System - Estidama

Credit
Submission:
Construction
Rating
Calculations
and
Methodology
� Spreadsheet listing as per LBi-5.1 highlighting zonal indoor operative temperatures
during natural ventilation period. Zoning information provided must match the
information provided in Credit LBi-5.1 Thermal Zoning.
Submission of spreadsheet results and associated plans for ‘typical floors’ will only be
accepted where equivalency can be demonstrated.
Mechanical Ventilation Period of Operation
� Brief narrative describing how the project meets the Credit Requirements;
� As-Built Plan Drawings of the mechanical ventilation systems, clearly indicating zone
boundaries and zone references;
� Screen shots of simulation model Thermal Zones; and
� Spreadsheet listing as per LBi-5.1 augmented with PMV and PPD results from
simulations. Note that zones must match the information provided in Credit LBi-5.1
Thermal Zoning.
Mixed-mode Ventilation Period of Operation
� Brief narrative describing how the project meets the Credit Requirements including
discussion on period of year intended for natural ventilation, mean monthly
temperatures during this period, window control strategy and tables of opening area
per window type;
� As-Built Elevation drawings highlighting extent of operable window typologies used per
façade;
� As-Built Section drawings for each operable window typology showing maximum
window opening position for each operable window type; and
� Spreadsheet listing as per LBi-5.1 highlighting zonal indoor operative temperatures
during natural ventilation period. Zoning information provided must match the
information provided in Credit LBi-5.1 Thermal Zoning.
Submission of spreadsheet results and associated plans for ‘typical floors’ will only be
accepted where equivalency can be demonstrated.
Dynamic Simulation Modeling (DSM) software must be capable of hourly simulations
covering a period 8,760 hours.
For DSM software incapable of calculating PMV / PPD, designers may use equations 1 to 5
of EN ISO 7730 to establish these values from DSM results. For spaces served by fully mixed
all air systems, such as provided by Fan Coil Units or Variable Air Volume systems, in which
the relative humidity is centered on 50% +/- 10% and the air speed can be assumed to be
less than 0.1ms -1 use figure A1 for the relevant category being pursued in conjunction with
DSM results.
Consideration must be given to appropriate metabolic rates and clothing indices for the
intended space usage and mix of local and western attires.
For sedentary activities, such as for desk based office workers, inclusion of thermal
insulation associated with ‘standard office chairs’ (as per Table C.3) must also be included
in the clothing index unless it can be proven that other types such as ‘net/metal chairs’
will be installed.
References � EN ISO 7730 : 2005 “Ergonomics of the thermal environment – Analytical determination
and interpretation of thermal comfort using calculation of the PMV and PPD indices
and local thermal comfort criteria”, www.bsigroup.com
� ASHRAE 55-2004, “Thermal Environmental Conditions for Human Occupancy”,
www.ashrae.org
Pearl Building Rating System: Design & Construction, Version 1.0, April 2010 103 of 223