ventilation, and air conditioning system (HVAC) creates interior
comfort by compensating for climatic conditions. Many efficient
HVAC system design options exist than those used in current
practice and must be explored by designers pursuing high
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- e-News #68: Guestroom Controls for the Hospitality Sector
was San Francisco's first hotel to implement a cardkey system to control lights and HVAC systems in guestrooms. Monitored data from four rooms in the hotel showed a reduction in heating and cooling energy of 45% during the peak cooling season. Computer simulations based on monitored occupancy levels in the hotel estimate a savings of 32% of annual heating and cooling costs. Modeled across five different climate zones, the average savings were 26%.
- Design Guidelines: CoolTools Chilled Water Plant
have plants that make chilled water and distribute it to air handling units and other cooling equipment. The design operation and maintenance of these chilled water plants has a very large impact on building energy use and energy operating cost.
- Design Guidelines: EDR Multifamily Design Guide for Energy Efficiency
provides a summary of resources, methods, and tools to assist the design community in building more energy efficient multifamily buildings, which are increasingly popular in California.
- Design Brief: Industrial Process Heat Recovery
in the industrial and
manufacturing sectors, and it often results in a large amount of
waste heat that is discharged into the atmosphere.
- e-News #67: Cool Thermal Energy Storage
during the hottest summer days, mostly due to air conditioning loads, which account for almost 28% of California's peak electrical demand. A cool storage thermal energy storage system (TES) provides a means for shifting all or part of a facility's cooling energy use to off-peak hours, when energy costs are lower and cooling systems can potentially run more efficiently. A TES system uses cooling equipment at night to remove heat from a thermal reservoir of chilled water or ice, which can then be used for space cooling throughout the day.
- Design Brief: Demand-Controlled Ventilation
that varies the amount of ventilation outside air delivered to a space based on input from a single carbon dioxide (CO2) sensor or group of sensors.
- Case Studies: Tahoe Center for Environmental Sciences
is a three-story, 45,000 ft2 building on Sierra Nevada College's Lake Campus that demonstrates how an ambitious project team can successfully reduce energy usage by implementing a variety of innovative mechanical designs at minimal additional first cost.
- Design Brief: Energy Management Systems
management systems save about 10 percent of overall annual building energy consumption. An energy management system (EMS) is a computer that controls the operation of all major building systems, in order to run the building efficiently and effectively. An EMS can reduce a building's overall energy use by about 10 percent.
- Design Brief: Integrated Design for Small Commercial HVAC
design methods for rooftop heating, ventilation, and air conditioning (HVAC) systems, significant improvements in operational savings, energy efficiency, and indoor comfort can be achieved.
- Design Brief: Underfloor Air Distribution and Access Floors
and access floor systems can provide energy savings, improved indoor air quality, and a technology ready environment for today's commercial buildings.