UNIVERSITY OF WASHINGTON, SEATTLE

MOLECULAR ENGINEERING & SCIENCES BUILDING – A LEED GOLD PROJECT.

PRESENTATION SEQUENCE.

• PROJECT OVERVIEW.

• SUSTAINABILITY OBJECTIVES.

• INTEGRATED DESIGN STRATEGIES FOR LOAD REDUCTION.

• ROLE OF EDMONDS’ ECOPOWER HYBRID VENTILATORS.

• RESULTS.

• QUESTIONS.

PROJECT OVERVIEW

• PROJECT COMMENCED IN 2009 AND WAS COMPLETED IN 2012.• BRIEF WAS TO ACHIEVE LEED GOLD.• STRATEGY WAS TO INTEGRATE NATURAL VENTILATION WITH AIR

CONDITIONING, FAÇADE DESIGN, THERMAL MASS, DAYLIGHTINGAND PHASE CHANGE MATERIAL TO ACHIEVE LEED GOLD.

PROJECT OVERVIEW

• A 5 storey, 8,361m² space building.

• Mix of research laboratories, lecture theatres and offices.

• Laboratories must be controlled at standard temperatures.

• Siting challenges

SUSTAINABILITY OBJECTIVES

• PURSUIT OF LEED GOLD.

• CAPABILITY TO PROVIDE AN ACCEPTABLE WORKING ENVIRONMENT, USING ONLY NATURAL VENTILATION, FOR OFFICES AND MEETING ROOMS.

• USE WATER CAPTURE AND FILTRATION TO PROVIDE MUCH OF WATER NEEDS.

DEVELOPMENT OF INTEGRATED DESIGN STRATEGIES – CLIMATE CONSIDERATIONS.

• 97% of all operating hours would be within the so called adaptive comfort range.

• Peak temperatures occur in late afternoon in July and August.

• Clear seasonal wind pattern with strong directionality when temperatures exceeded 75⁰F (24⁰C)

LOAD REDUCTION TASK

• Initial energy model constructed in eQuest• For natural ventilation to work in this temperate climate

target is less than 12.5 Btu/hr/sq.ft.• Model revealed peak load in office of 27 Btu/hr/sq.ft

FACADE

• SOLAR GAINS REQUIRED TO BE REDUCED BY 80% THROUGH FAÇADE:

o REDUCE GLAZED AREA

o HIGH PERFORMANCE THERMAL GLAZING.

o SUN SHADING

DAYLIGHT

DETAILED DAYLIGHT STUDIES UNDERTAKEN USING BOTH PHYSICAL AND DIGITAL MODELS.

AUTOMATIC BLINDS TO REDIRECT DIRECT SUNLIGHT TO CEILING.

AIRFLOW DESIGN

• SINGLE ZONE AIRFLOW MODEL USED TO DETERMINE AIRFLOW PATHWAY TO ENSURE ENOUGH CROSS SECTIONAL AREA FOR PASSIVE DRAW.

• MECHANICALLY OPERATED UPPER WINDOWS TIED TO BMS.

• LOWER WINDOWS MANUALLY OPERATED.

AIRFLOW DESIGN

AIR QUALITY & AIR COMFORT

Edmonds EcoPower900

ECOPOWER HYBRID VENTILATOR – 900mm

• Patented Australian technology.

• Operated by wind/stack alone or mechanical/wind/ stack together.

• Controlled through BAS with flow rate measure through thermal dispersion sensors. Solar Chimneys

THE SELECTION OF ECOPOWER 900 AS THE PRIMARY VENTILATION DEVICE.

Capability to operate in natural wind mode alone or wind/mechanical.

Best specific performance (cfm/W) ever recorded for a commercially available mechanical device (∆p=0). Capable of managing up to 45 Pa loss.

Unimpeded operation in natural mode.

Virtually inaudible operation in wind or mechanical modes.

No use of fan blades which reduce energy efficiency and create noise.

Use specially designed German electronic commutating motors.

0-10v control (or 4-20mA ) available for main product (36”).

Light weight (constructed primarily from marine grade equivalent aluminium)

LAB SPACECONFERENCE ROOM WITH TOP WINDOWS CONTROLLABLE

PRE-VEGETATED MATT SYSTEM NATURAL LIGHT & CONTROLLABLE WINDOWS

RESULTS.