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HVAC ice storage
Help your power systems support renewable energy resources with thermal energy storage Cold thermal energy storage (CTES) can help utilities increase renewable energy production. CTES stores energy generated by solar or wind until it's needed by the utility. The University of Wisconsin-Madison partnered with Slipstream to research CTES control strategies that maximize how much renewable energy can be used. Read more
building automation
Deep energy savings. Lower installation and commissioning costs. All commercial building types. It’s time to move beyond lighting replacements. Read more
research, analysis, discovery, illustration, word group, development
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. Here is a summary of a few of our experiences with new approaches to energy efficiency in refrigeration. Read 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! Read more
daylight controls
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. Read more
VRF
Application of air source variable refrigerant flow (VRF) 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. Read more
Piping
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. Read more
Building systems integration
A couple of years ago, my team conducted a research project investigating how to reduce the energy use of office plug loads. Among the solutions we tested, one option was a power strip with an occupancy sensor. It shut off your monitors and other gadgets when you were away from your desk. Many buildings we investigated also had occupancy sensors controlling the lighting in the same office space. One of the offices we tested had yet a third occupancy sensor network – and CO2 sensors to control the HVAC system in some spaces. Read more
Publication
Commissioning and retro-commissioning (RCx) are critical in propelling building performance—but what happens once retro-commissioning is complete? Do the energy savings continue long after installation? And why do some buildings see long-lasting results, while others don't? We set off to answer these questions and more through a comprehensive study of the persistence of energy savings.  Read more
Walgreens storefront
In this webinar, our team of experts and practitioners show how to approach a net zero building project. Attempting to achieve net zero energy creates unique design, engineering, and business challenges that require innovative solutions. Read more