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Zero Energy Lab (ZØE)

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by Gus Checketts on 16 November 2013

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Transcript of Zero Energy Lab (ZØE)

Research at the Zero Energy Lab (ZØE) of UNT
The Net Zero Energy Research Laboratory at UNT, usually shortened to Z0E, is a research building intended to further research on energy production and savings on residential and small scale buildings. This 1200 square foot building is composed of two sections: a living space and a work or research space. It contains energy efficient and sustainable systems and materials as well as energy generation and monitoring systems to track energy production and consumption.
The goal of the Z0E is to become a net zero energy building. This means that on an annual basis the energy that is produced by the on-site renewable energy sources (like the wind turbine and solar paneling) will be equal to the amount of energy consumed by the building. Thus, a net zero use of energy. Some of the energy efficient systems associated with the Z0E are a Radiant Floor System, a Vertical Closed Loop (Geothermal) Heat Exchanger, Low Emission Windows, Solar Hot Water Panels, an Energy Ventilation Recovery System, a passive ventilation Solar Chimney, and a master control system with over 90 sensor data inputs. [explain these a bit, in general]
Some of the sustainable features of the building include a Rainwater Harvesting System, the roof and walls made of Structural Insulated Panels, Bamboo Flooring and Millwork, Recycled Glass Countertops, and locally available materials such as brick and steel.
Using the monitoring system in the laboratory and the living areas, research performed at the Z0E includes testing current state of the art energy efficient household equipment such as Heat Pumps and Radiant Floors in a real setting to monitor performance and determine what factors can improve efficiency or what equipment is best for a specific geographical area. With the equipment on hand, human behavior and comfort levels with regards to energy consumption can be monitored and identified to find what will make occupants most comfortable while still providing the maximum energy savings possible.
The research performed at the Z0E will provide valuable data on what energy-efficient and sustainable technologies can be used in a residential or small building setting to decrease energy consumption and emissions. That means that technology being tested here could make your next home be drastically more energy efficient: that’s better for the environment and saves you money.

Zero Energy Lab (ZØE)
Z0E Facts
Built 2012
Designed by Dr. Yong Tao
Net Zero Energy Concept

Energy Production
Wind Turbine
5 Blade Downwind Horizontal Axis
3.5 kW-Rating
Energy Production : 500kWh/month
(5.0m/s average wind speed)
Solar PV (Photovoltaic) Panels

System Capacity: 5.64 KW
Total Module: 24 pieces
Weather resistant
Schott poly crystalline PV modules
DC to AC through Enphase micro inverters integrated with each PV module
Z0E Overview
The Zero Energy Lab of the University of North Texas is a research facility built in April 2012 for the purpose of researching and testing energy production and energy efficient and sustainable technologies.
Sustainable Features of the ZØE
Rainwater Harvesting System
3000 gallon capacity
Inverted roof shape allows for maximum rainwater collection


Virtual Tour Project
Research at the ZØE
Data Collection, Documentation, and Detailed Analysis of Power Generation and Consumption of the Building
Medium Temperature Solar Thermal Energy Storage System Using Phase Change Materials Multiyear
Modeling of Geothermal System

Guangyuan Xiong (Robert)
Analysis of Occupancy-Related Parameters in Energy Modeling
The value and scheduling of lighting and set point have an effect on energy consumption
Cooling set point has the highest effect on energy consumption Texas
Occupancy number has least influence
Solar Chimney Passive Ventilation System
Effectively modeled Solar Chimney in ZØE using CFD
Verified that Solar Chimney is effective in generating ventilation flow
Suraj Talele
Naimee Hasib
Performance Analysis of Alternative HVAC Systems
Ground Source Heat Pump uses less electricity than Evaporative Cooling or Electric Chiller Systems
GSHP is also more cost effective
Post Storage Tank Filtration
100 Micron Mesh Filter
5 micron sediment filter
Duplex 5 micron carbon filter
Sanitron UV filter
Low-Emission Windows
Allows light in but keeps the heat out
Inside the ZØE
Solar Hot Water Panels
Harvests heat from sunlight to heat water to supplement hot water system
Energy Efficient Technologies
Vertical Closed Loop Heat Exchanger
6 wells dug 225 ft. deep serves:
Radiant Floor System
A Water-to-Water and Water-to-Air Heat Pump for cooling and heating
A Water-to-Water Heat Pump for Hot Water
Radiant Floor System
System of tubes filled with fluid run under the floor to heat in the winter or cool in the summer
Improved ventilation rates on still, hot days
Reduced reliance on wind and wind driven ventilation
Improved control of air flow though a building
Improved air quality and reduced noise levels in urban areas
Increased night time ventilation rates
Solar Chimney
(Passive Ventilation)
Energy Recovery ventilation (ERV)
Using air in the building to pre-cool (summer) or pre-heat (winter) the incoming fresh air
Living Space
Stowaway Bed
Living Area
Kitchen
Bathroom
Workspace
Bamboo Millwork
Recycled Glass Countertops
Bamboo Flooring
Current Research
Energy Efficient Lighting
Natural Light
LED lighting for Outdoors
Halogen Light System
Florescent Tube Lighting
Daylight detecting sensors
Work Space of Z0E
Living Area
Geothermal Heat Pumps
Water-to-Water Heat Pump for cooling and heating
Water-to-Air Heat Pump for cooling and heating
Water-to-Water Heat Pump for Hot Water
System Monitoring and Controls
Control System based on more than 90 sensors
Chiller, Boiler Information
Outside Air Information(CO2 etc)
Room Air information
System fluid information

ZØE Website
https://engineering.unt.edu/mechanicalandenergy/about-z%C3%B8e-lab
Zero Energy Concept
The Zero Energy Lab has the end goal of becoming an annual net zero energy building. This means that on an annual basis, the renewable energy generations systems (wind and Solar PV) will return as much energy back to the grid as what is being consumed by the building equipment. See how we are doing now:
Visit: http://egauge3164.egaug.es/
Transparent Glass

Transparent Glass

Hot Air from Inside

Cool Outside Air

Small
Window

Small
Window

Vent

Wall




Wall
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