One of the newest buildings at Mills College, in Oakland CA, utilizes a Delta Controls system and is also LEED Platinum certified. The Betty Irene Moore Natural Sciences Building provides laboratories, classrooms and research space to the school, all while making a minimum impact on the environment and energy demand. From material selection to water use, the Natural Sciences Building was designed for sustainability.
ESI installed the new Delta Controls system featuring a rainwater collection system that can be later recycled throughout the building’s restroom toilets, automatic windows to allow natural ventilation and separate systems for precise control of sensitive laboratory conditions.
A large photovoltaic array on the roof provides more than 30% of the buildings energy demand while ESI continually monitors both building power consumption and production. The building’s energy usage is displayed in real time on a Lucid Design Dashboard in the building lobby. This monitoring is also stored in an on-site Delta server for future trending and verification.
The Homer Building at Sacred Heart Prep School in Atherton, CA is a great example of how careful planning and intelligent design coupled with advanced controls strategies can lead to an environmentally friendly building. The Homer Building has been awarded LEED Platinum by the US Green Building Council for its sustainable design, extended energy saving measures, and on-going commitment to reducing CO2 emissions and improving indoor environmental quality.
The Homer Building utilizes a full Delta Controls system, including Historian for long term trending, and a DeltaWeb server for remote access to the system. ESI incorporated energy saving control techniques such as optimum starting, trim and response, supply air setbacks and demand response to reduce energy usage, all while maintaining building comfort and air quality. By using these strategies and working with the naturally tempered climate in Atherton, 90% of the occupied space within the building does not require mechanical cooling.
In addition to using less energy than comparable buildings, the Homer Building also supplements their energy usage with a 50kW photovoltaic array on the roof. This system not only reduces energy consumption during the week, but also produces energy on the weekend that can be returned to the grid to help the communities energy demand. ESI’s Delta Controls system monitors the available solar radiation to ensure the array is working properly.
The ESI installed mechanical project at Ohlone College, in Fremont, CA, was the first educational facility built with LEED Platinum level features. The project scope included the installation of 110 water source heat pumps, all ductwork, and piping. Most notably, this job also included two ESI installed enthalpy wheels to maximize the use of outside air; brought inside the building to improve air quality.
The Monterey Conference Center was originally designed in 1974 and completed in 1977. This building, with very few major renovations, is still considered to be one of the nation’s premiere convention centers. However, the Conference Center was in dire need of having both the equipment well roof as well as the HVAC system replaced and upgraded.
In February of 2007, ESI was awarded the contract to replace and upgrade the rooftop HVAC system.
equipment. This included replacing the outdated and oversized chiller, motors, compressors, chiller/cooling tower combination, pumps, and upgrade the building control system.
By providing strong leadership and skilled, hardworking project foremen, ESI was able to complete the work in the summer of 2007. This retrofit provided energy savings resulting from a reduction in fan and pump energy use, improved efficiency of the chiller and a reduction in the required supply air reheat.The measures taken by ESI resulted in an almost 40% reduction in building energy use per year for the City of Monterey Conference Center.
By installing VFD’s at the motors and pumps, the high efficiency chiller, air dampers and improved controls throughout the building, the City is achieving even greater energy savings. The energy savings for this project are estimated to be 320,918 kWh and 9,138 therms annually. Furthermore, the City was granted rebates totaling $51,300 and rewarded by not having to spend almost $60,000/year in energy costs.