Emerging tech

We are honored to be a part of two grid-interactive efficient building (GEB) solutions to be tested in U.S. General Services Administration (GSA) facilities. The pilot projects will determine how well these GEB solutions improve building energy efficiency. They will also test the ability to control the building energy system for load shedding and load shifting in order to reduce building peak demand and demand charges. More
How can future versions of the ASHRAE 90.1 energy standard drive more energy cost savings? No studies have been conducted that determine the energy cost savings for buildings that comply with ASHRAE’s standard 90.1-2010 vs. the 2004 version based on utility bill data and building surveys. Slipstream will address this gap by documenting the energy performance of two building types. Then we’ll explore how to improve future versions of the standard to drive energy cost savings. More
National Grid Rhode Island selected Slipstream to add innovation to their efficiency programs and increase their program savings potential by kilowatt hours and therms. Slipstream will assess three new emerging technologies. These include:  More
This field study evaluated the performance of variable frequency drives retrofitted to condenser fans in supermarket refrigeration systems. More
refrigeration technology
Refrigeration is a massive energy consumer in commercial and industrial buildings. According to the International Institute of Refrigeration's Role of Refrigeration in the Global Economy, it consumes around 17 percent of all electricity in the commercial sector alone. Rising demand and a warming climate mean almost certain expansion for refrigeration. This also means tremendous opportunity for energy savings; effort has gone into implementing many measures to reduce energy use in refrigeration across the country. More
As the modern grid evolves, the electricity supply and demand will be more dynamic than ever. We need two-way communication between electric service providers and building energy management systems. Slipstream’s engineers created foundational education to empower building owners, designers, and building operators to build and operate for smart grid design. ASHRAE’s Smart Grid Application Guide: Integrating Facilities with the Electric Grid is the first and only of its kind developed for building designers and operators. More
We are proud to announce that Slipstream’s Deb Dynako has been elected as co-chair of the 2020 Association of Energy Service Professionals (AESP) Innovation in Tools and Tech Committee. More
green world
Our Energy Engineer, Greg Marsicek, was interviewed by Carina Wallack of E4TheFuture for a recent blog post titled, “Smarter Energy Savings: Technology’s Expert Voices.” Greg was featured with several other experts in the field from Lawrence Berkeley National Laboratory, Google, and Mitsubishi Electric Trane HVAC US. Check out Greg’s portion of the interview below and head over to E4TheFuture for the full article.  More
University of Chicago
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
curved glass building
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
hybrid ground-coupled heat pumps
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
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
Seventhwave Madison
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
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
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
Comfort study
What is the relationship between perceived comfort level and actual physiological data? Slipstream is excited to participate in a research study to help answer this question. More
Powering down, powering off
Plug load energy—from computers to copiers to water coolers—represents a relatively untapped energy savings resource in commercial buildings. And unlike most types of loads like lighting, heating, and other end uses, plug load energy use is increasing nationwide. The energy efficiency industry needs to do more to both identify and quantify strategies for reducing plug load. More