This paper presents the development status of thermal and nuclear power industries in China in recent years. It makes a comparison between the two industries from the aspects of reliability, economics, energy saving a...This paper presents the development status of thermal and nuclear power industries in China in recent years. It makes a comparison between the two industries from the aspects of reliability, economics, energy saving and pollutant reduction, by which the effects of expanding nuclear power on pollution control, resources conservation and eff icient energy use are evaluated, and several points of view are summarized.展开更多
The effect of two nighttime ventilation strategies on cooling and heating energy use is investigated for a prototype office building in several northern America climates, using hourly building energy simulation softwa...The effect of two nighttime ventilation strategies on cooling and heating energy use is investigated for a prototype office building in several northern America climates, using hourly building energy simulation software (DOE2.1E). The strategies include: scheduled-driven nighttime ventilation and a predictive method for nighttime ventilation. The maximum possible energy savings and peak demand reduction in each climate is analyzed as a function of ventilation rate, indoor-outdoor temperature difference, and building thermal mass. The results show that nighttime ventilation could save up to 32% cooling energy in an office building, while the total energy and peak demand savings for the fan and cooling is about 13% and 10%, respectively. Consequently, finding the optimal control parameters for the nighttime ventilation strategies is very important. The performance of the two strategies varies in different climates. The predictive nighttime ventilation worked better in weather conditions with fairly smooth transition from heating to cooling season.展开更多
文摘This paper presents the development status of thermal and nuclear power industries in China in recent years. It makes a comparison between the two industries from the aspects of reliability, economics, energy saving and pollutant reduction, by which the effects of expanding nuclear power on pollution control, resources conservation and eff icient energy use are evaluated, and several points of view are summarized.
文摘The effect of two nighttime ventilation strategies on cooling and heating energy use is investigated for a prototype office building in several northern America climates, using hourly building energy simulation software (DOE2.1E). The strategies include: scheduled-driven nighttime ventilation and a predictive method for nighttime ventilation. The maximum possible energy savings and peak demand reduction in each climate is analyzed as a function of ventilation rate, indoor-outdoor temperature difference, and building thermal mass. The results show that nighttime ventilation could save up to 32% cooling energy in an office building, while the total energy and peak demand savings for the fan and cooling is about 13% and 10%, respectively. Consequently, finding the optimal control parameters for the nighttime ventilation strategies is very important. The performance of the two strategies varies in different climates. The predictive nighttime ventilation worked better in weather conditions with fairly smooth transition from heating to cooling season.