Residential air conditioning represents a challenging load for many electric utilities due to poo... more Residential air conditioning represents a challenging load for many electric utilities due to poor load factors. This is most pronounced in hot-dry climates where nighttime cooling loads are often minimal due to a lack of humidity, but loads in the late afternoon are high. Building mechanical pre-cooling is a strategy that improves the load factor by shifting cooling operation from on-peak hours to off-peak hours. Shifting air conditioner use to off-peak periods provides benefits to utilities and the electric grid, as well as to occupants who can take advantage of time of use electric rates. The paper presents results of EnergyPlus modeling to evaluate pre-cooling in hot-dry climates. Field monitoring results are also presented, obtained from a high performance home which utilizes the slab floor mass as thermal storage. A successful off-peak air conditioning strategy offers the potential for increased efficiency, assured occupant comfort, and a more reliable and robust electrical gr...
Retrofitted two-speed pump motors were tested at five residential sites located in Edison service... more Retrofitted two-speed pump motors were tested at five residential sites located in Edison service area. Timers were set to double filtration times so that the volume of water filtered per day was not decreased. Energy savings ranged from 38% to 65% and no decline in pool water clarity was noted. An owner simple payback of 1.8 years, and a utility benefit-cost ratio (BCR) of 12.4 was calculated for a typical retrofit application.
Some California home builders are combining building integrated solar generation with energy effi... more Some California home builders are combining building integrated solar generation with energy efficient technologies and green design strategies to create a market edge in the current recessed housing market. Through the combination of energy efficiency and on-site energy generation, these homes use significantly less energy than standard code-built homes in California, reducing the impact of development. These builders have established path-breaking marketing strategies to capture maximum value of their efforts, including investing in dynamic, educational showrooms that allow homebuyers to fully understand the potential cost and environmental savings. The result is accelerated home sales, and improved customer satisfaction. The paper describes technologies used to achieve the projected savings, the strategies used to market the advantages the homes have in the marketplace, and sales results demonstrating how these builders are selling compared to their competition.
Residential air conditioning represents a challenging load for many electric utilities due to poo... more Residential air conditioning represents a challenging load for many electric utilities due to poor load factors. This is most pronounced in hot-dry climates where nighttime cooling loads are often minimal due to a lack of humidity, but loads in the late afternoon are high. Building mechanical pre-cooling is a strategy that improves the load factor by shifting cooling operation from on-peak hours to off-peak hours. Shifting air conditioner use to off-peak periods provides benefits to utilities and the electric grid, as well as to occupants who can take advantage of time of use electric rates. The paper presents results of EnergyPlus modeling to evaluate pre-cooling in hot-dry climates. Field monitoring results are also presented, obtained from a high performance home which utilizes the slab floor mass as thermal storage. A successful off-peak air conditioning strategy offers the potential for increased efficiency, assured occupant comfort, and a more reliable and robust electrical gr...
Retrofitted two-speed pump motors were tested at five residential sites located in Edison service... more Retrofitted two-speed pump motors were tested at five residential sites located in Edison service area. Timers were set to double filtration times so that the volume of water filtered per day was not decreased. Energy savings ranged from 38% to 65% and no decline in pool water clarity was noted. An owner simple payback of 1.8 years, and a utility benefit-cost ratio (BCR) of 12.4 was calculated for a typical retrofit application.
Some California home builders are combining building integrated solar generation with energy effi... more Some California home builders are combining building integrated solar generation with energy efficient technologies and green design strategies to create a market edge in the current recessed housing market. Through the combination of energy efficiency and on-site energy generation, these homes use significantly less energy than standard code-built homes in California, reducing the impact of development. These builders have established path-breaking marketing strategies to capture maximum value of their efforts, including investing in dynamic, educational showrooms that allow homebuyers to fully understand the potential cost and environmental savings. The result is accelerated home sales, and improved customer satisfaction. The paper describes technologies used to achieve the projected savings, the strategies used to market the advantages the homes have in the marketplace, and sales results demonstrating how these builders are selling compared to their competition.
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Papers by David Springer