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Designing Energy-Aware Sensor Systems
Published in S. Sitharama Iyengar, Richard R. Brooks, Distributed Sensor Networks, 2016
N. Vijaykrishnan, M.J. Irwin, M. Kandemir, L. Li, G. Chen, B. Kang
Another technique that will apply to reducing standby power is the use of sleep transistors like those shown in Figure 28.4. Standby power can be greatly reduced by gating the supply rails for idle components. In normal mode (non-idle), the sleep transistors must present as small a resistance as possible (via sizing) so as to not negatively affect performance. In sleep mode (idle), the transistor stack effect [6] reduces leakage by orders of magnitude. Alternative, standby power can be completely eliminated by switching off the supply to idle components. A sensor node employing such a technique will require system software that can determine the optimal scheduling of tasks on cores and can direct idle cores to switch off their supplies while taking into account the cost (both in terms of energy and time) of transitioning from the on-to-off and off-to-on states.
Common Electrical Myths That Increase Energy Costs
Published in John Eggink, Managing Energy Costs: A Behavioral and Non-Technical Approach, 2020
An astonishing number of electrical devices consume power when switched off. Worldwide, this standby power is estimated to account for as much as 1% of global green house emissions.3 A study by Alan Meier of Lawrence Berkeley National Laboratory found that, based on rough assumptions, office equipment in low-power modes may be responsible for 1.1 billion kWh a year of energy consumption just in California.4 In stand-by mode an average computer may use 15 watts, a halogen desk lamp may use 3 watts, and a small copy machine between 45 to 60 watts. This adds up. There is some reason to believe that the energy use of equipment in low power modes is the fastest growing component of energy use.
Energy in the built environment
Published in Jane Powell, Jennifer Monahan, Chris Foulds, Building Futures, 2015
Jane Powell, Jennifer Monahan, Chris Foulds
There has also been an increase in the standby electricity used by ICT and consumer electronics. Standby power refers to the power used by an appliance or device while it is switched off but is still using power. Standby electricity was thought to be around 6 per cent of all household electricity demand (JRC/IE, 2009), but a recent UK survey found standby electricity amounted to 9–16 per cent of total electricity demand (EST, 2012).
Fuzzy Control Assisted Vehicle-to-Home (V2H) Energy Management System
Published in Smart Science, 2018
Mahdi Shafaati Shemami, Mohammad Saad Alam, M. S. Jamil Asghar
This system is most suitable for the urban localities of developing countries where a power supply with few hours of load shedding is common. The proper and total utilization of solar energy will help in reducing the load demand on the utility grid during daylight. Thus, the system also works as peak power plant by letting off the home load from the grid during maximum insolation hours which matches with the daily peak load times. Thus, the system also works as an H2G system. However, in the late hours at night and when the stored energy of the EV battery is exhausted (reached to the preset level of SOC), the load shedding at this condition causes a complete shutdown of power supply. Therefore, a low-power standby power supply is required for essential/ emergency load (lights and fans only).
A novel hybrid approach for cutting parameters optimization considering processing energy and efficiency in turning process
Published in International Journal of Green Energy, 2022
Sheng Pu, Hua Luo, Shixiong Xing, Chuan Sun
In order to study the relationship between the no-load power of machine tools and spindle speed, eighteen groups of experiments were carried out. The rotation speed is 145 r/min-1500 r/min, which is mainly changed according to the cutting speed corresponding to different cutting diameters. During the cutting process, the power sensor collects the signals before and after the spindle rotates to obtain the standby power and no-load power, as shown in Table 1.
Transaction model and energy management optimisation method of rural microgrid
Published in Cyber-Physical Systems, 2023
Mengkai Chen, Baochuan Fu, Zhenping Chen, Jianhan Wu
Industrial power supply requires a high power stability, thus, the factory usually needs a diesel generator as standby power supply. In addition, the use of natural resources such as wind and photovoltaic power can reduce the cost of power consumption and the power grid operating pressure. In conclusion, the industrial area is suitable for the MG distributed energy generation mode that combines wind power generation, photovoltaic power generation and diesel generator standby power generation.