Since the combustion of fossil fuels is the leading causative factor in global climate change, the "Westernmodel'' of adopting energy-using technologies and using ever-greater amounts of energy will have important consequences for the future of human life on the planet if it is transferred on a wholesale basis to the developing world. It is thus important to Uy to understand, in the context of global development.
Procedures were developed and tested to conduct a quick and reliable evaluation of weatherization program energy savings using heating system nm-time loggers. This project performed: (1) a statistical analysis to determine the measurements and assessment constraints on short-term nm-time monitoring, and (2) a field test of the data collection procedures with three weatherization providers.
Residential new construction and renovation programs, home energy rating systems programs and energy efficient mortgage instruments are some of the many ways that local energy utilities and other state or federal agencies attempt to increase the supply and demand of energy efficient housing.
A detailed evaluation methodology, originally developed for PG&E's Act2 Project, was used to design cost-effective packages of energy efficiency measures (EEM's) for two residential sites in the Coachella Valley desert region of Southern California Design of the packages was based on "mature market" cost assumptions, which assume that the EEM has achieved volume production and widespread application in the marketplace. EEM packages were installed at the two sites (one new construction and one retrofit) and monitored for nine months during 1995.
As required by the National Appliance Energy Conservation Act (NAECA), minimum energy efficiency standards ranging from 8.0 to 9.0 EER went into effect for window-type room air conditioners on January 1, 1990. But by incorporating commonly used technologies such as high-efficiency rotary compressors, grooved refrigerant tubing, slit-type fins, subcoolers, and permanent split capacitor fan motors, 10.0 EER efficiency levels can be achieved for the most popular classes of room air conditioners without having to increase chassis size.
During the cooling season, heat transfer from the attic into the conditioned space of a residence can represent a significant portion of the total envelope heat transfer. Radiant barriers are one method used to reduce this heat transfer. A quasi-steady-state model was developed or predicting attic heat transfer in residences with radiant barrier systems. The model was used to estimate the reduction in cooling load that would occur with a radiant barrier and to identify important construction and environmental parameters that influence this cooling load reduction.
Real-time ventilation and infiltration measurements were made on ten single-family homes. Seven of these had crawlspaces and were in the Pacific Northwest Two had daylight basements and were also in the Pacific Northwest. The other is an energy efficient demonstration "smart" house built in Rocklin, CA, and was built on a crawlspace. All of the homes were tested under heating season conditions. The home in Rocklin was also tested under cooling conditions. Each house was divided into multiple zones, including buffer spaces, and each test period lasted about a week.
It's 10:00 PM. Do you know what your building is doing? Is the economizer set to maximum outside air? Has the lighting control system, be it human or machine, switched circuits off in unoccupied areas? What percentage of your personal computers is running?
Increased building indoor air quality (IAQ) complaints due to reduced outdoor air ventilation rates led to ASHRAE Standard 62-1989. Even though the stipulated total outdoor ventilation flow rate may be drawn into the HV AC system, thermal imbalances in the various zones of the building can lead to certain zones being starved of the specified ventilation flow rate thereby creating localized IAQ problems.
Thermal distribution systems represent the most promising opportunities for cost-effective energy savings in residential new construction. This paper describes the results of an unusual but on-going collaboration between the building industry, the environmental community, the research community, and the regulators to develop cost-effective, implementable procedures for improved heating, ventilating and air conditioning (HV AC) duct system design, fabrication, and installation
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