University of Chicago
Blog | June 13, 2019
To serve the mission at Slipstream, our work sits at the crossroads between human health and wellbeing, energy efficiency and equity, and clean and reliable power. To meet our goals in these areas we typically develop and implement large scale initiatives based around utility partnerships and programs. More
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research, analysis, discovery, illustration, word group, development
Blog | May 28, 2019
Refrigeration is a massive energy suck in commercial and industrial buildings. So much so that tremendous effort has been put into measures to reduce energy use in refrigeration systems across the country. Even though the industry has worked tirelessly to install system controls, there is still a long way to go. Our research team has continued to look for more aggressive solutions in the refrigeration world. More
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curved glass building
Blog | March 20, 2019
Our research team is passionate about solutions that inspire responsible energy use and research that advances energy systems. It is important to us to make our tools and information readily available to building designers and facility staff since they can change the way impactful decisions are made. That’s why we developed the only FREE climate data toolkit. More
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hybrid ground-coupled heat pumps
Tool | January 1, 2019
Reduce the cost of implementing geothermal heat pump systems on your building projects by going hybrid. A hybrid geothermal heat pump system can lower your costs by reducing the peak capacity of your ground loop and allowing you to install a smaller, less expensive ground heat exchanger. HyGCHP is a software module that can help you analyze this option! More
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daylight controls
Research | December 20, 2018
Proper commissioning can lead to energy savings—often 60% or more Daylighting control, or daylight harvesting, has become a common energy savings strategy in many sustainable building projects, but several barriers still prevent successful implementation of this strategy in mainstream construction. Considerable effort is expended in the architectural and lighting design of daylighting controls, with actual execution being an afterthought. More
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VRF
Research | December 20, 2018
Application of air source variable refrigerant flow in cold climates Variable refrigerant flow (VRF) systems use variable speed, split heat pumps to provide space heating and cooling to a building's conditioned areas. Air source VRF systems perform best in moderate climates, as they typically lose capacity and efficiency at low ambient temperatures—or moderately low wet bulb temperatures where defrost is required—and may be supplemented by an additional heat source. More
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Seventhwave Madison
Research | December 20, 2018
Task tuning can lead to energy savings without loss of occupant comfort. Task tuning is one form of lighting control that can be used in commercial buildings to save energy. It involves dimming lights in a space so that the average illuminance at the working plane is appropriate for the type of use in that space. More
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Piping
Research | December 19, 2018
Energy savings and lessons learned from observed, practical approaches to demand control ventilation Demand control ventilation (DCV) systems use sensors — generally either CO2 or occupancy sensors — to estimate the actual number of people in an area and supply only as much ventilation air as is needed at a given time. DCV has the potential to save a substantial portion of building energy use in extreme climates like the northern Midwest. More
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RTU
Research | December 19, 2018
RTUs are used in more than one third of U.S. commercial buildings, the highest of any cooling equipment type. Why? They are reliable and have a low capital cost, as well as established service and distribution networks. There is anecdotal evidence, however, that these systems operate inefficiently. To validate or refute this evidence, we conducted a multi-level field study sponsored by Minnesota Department of Commerce, Division of Energy Resources. Resources: More
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Comfort study
Research | December 19, 2018
What is the relationship between perceived comfort level and actual physiological data? Seventhwave is excited to participate in a research study to help answer this question. More
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