PDLC film's energy consumption and performance for light filtration system

The latest results in Deep Neural Networks (DNNs) have greatly improved the accuracy and performance of a variety of intelligent applications. However, running such computation-intensive DNN-based applications on resource-constrained mobile devices definitely leads to long latency and huge energy consumption. The traditional way is performing DNNs in the central cloud, but it requires significant amounts of data to be transferred to the cloud over the wireless network and also results in long latency. To solve this problem, offloading partial DNN computation to edge clouds has been proposed, to realize the collaborative execution between mobile devices and edge clouds. In addition, the mobility of mobile devices is easily to cause the computation offloading failure. In this paper, we develop a mobility-included DNN partition offloading algorithm (MDPO) to adapt to user’s mobility. The objective of MDPO is minimizing the total latency of completing a DNN job when the mobile user is moving. The MDPO algorithm is suitable for both DNNs with chain topology and graphic topology. We evaluate the performance of our proposed MDPO compared to local-only execution and edge-only execution, experiments show that MDPO significantly reduces the total latency and improves the performance of DNN, and MDPO can adjust well to different network conditions.

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Power and Performance Evaluation of Memory-Intensive Applications

Energies ◽

10.3390/en14144089 ◽

2021 ◽

Vol 14 (14) ◽

pp. 4089

Author(s):

Kaiqiang Zhang ◽

Dongyang Ou ◽

Congfeng Jiang ◽

Yeliang Qiu ◽

Longchuan Yan

Keyword(s):

Energy Efficiency ◽

Energy Consumption ◽

Power Consumption ◽

Job Scheduling ◽

Memory System ◽

Processor Core ◽

Memory Efficiency ◽

And Performance ◽

Reasonable Use ◽

Server System

In terms of power and energy consumption, DRAMs play a key role in a modern server system as well as processors. Although power-aware scheduling is based on the proportion of energy between DRAM and other components, when running memory-intensive applications, the energy consumption of the whole server system will be significantly affected by the non-energy proportion of DRAM. Furthermore, modern servers usually use NUMA architecture to replace the original SMP architecture to increase its memory bandwidth. It is of great significance to study the energy efficiency of these two different memory architectures. Therefore, in order to explore the power consumption characteristics of servers under memory-intensive workload, this paper evaluates the power consumption and performance of memory-intensive applications in different generations of real rack servers. Through analysis, we find that: (1) Workload intensity and concurrent execution threads affects server power consumption, but a fully utilized memory system may not necessarily bring good energy efficiency indicators. (2) Even if the memory system is not fully utilized, the memory capacity of each processor core has a significant impact on application performance and server power consumption. (3) When running memory-intensive applications, memory utilization is not always a good indicator of server power consumption. (4) The reasonable use of the NUMA architecture will improve the memory energy efficiency significantly. The experimental results show that reasonable use of NUMA architecture can improve memory efficiency by 16% compared with SMP architecture, while unreasonable use of NUMA architecture reduces memory efficiency by 13%. The findings we present in this paper provide useful insights and guidance for system designers and data center operators to help them in energy-efficiency-aware job scheduling and energy conservation.

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Development and Performance Evaluation of a Filtration System for Washing Machines to Reduce Microfiber Release in Wastewater

Water Air & Soil Pollution ◽

10.1007/s11270-021-05342-6 ◽

2021 ◽

Vol 232 (10) ◽

Author(s):

Francesca De Falco ◽

Emilia Di Pace ◽

Maurizio Avella ◽

Gennaro Gentile ◽

Maria Emanuela Errico ◽

...

Keyword(s):

Performance Evaluation ◽

Washing Machines ◽

Filtration System ◽

And Performance

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The Effects of Window Film on the Performance of Window System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.525.408 ◽

2014 ◽

Vol 525 ◽

pp. 408-411

Author(s):

Min Seon Jang ◽

Gyeong Seok Choi ◽

Jae Sik Kang ◽

Yumin Kim

Keyword(s):

Energy Consumption ◽

Cooling Load ◽

Indoor Temperature ◽

Heating And Cooling ◽

Window System ◽

Window Systems ◽

Clear Glass ◽

Window Film ◽

And Performance ◽

Heating And Cooling Load

Window film is generally attached the glazing in buildings to improve the thermal performance of the window system by addressing a range of problems such as indoor temperature rise, indoor temperature imbalance, degraded heating and cooling load due to excessive influx of solar radiation. To evaluate the performance of window films, window films are attached to 3mm or 6mm clear glass. However, window films are generally used on existing window systems for reducing the annual energy consumption. Therefore it is necessary to evaluate the performance of window films depending on the performance of glazing such as clear double glazing or low-e double glazing. Thus the purpose of this study is to analyze the performance of window systems when window film is attached. As a result, in the case of applying window films for reducing the SHGC of buildings, it is necessary to select window films suitable for the configuration and performance of the glazing to be installed, considering the SHGC of the entire glazing system.

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Behavior and Performance of Refrigerant Mixture HFC125/HC290 in Heat Pumps

Volume 8B: Heat Transfer and Thermal Engineering ◽

10.1115/imece2013-63552 ◽

2013 ◽

Author(s):

Xiaowei Fan ◽

Fang Wang ◽

Huifan Zheng ◽

Xianping Zhang ◽

Di Xu

Keyword(s):

Energy Consumption ◽

Heat Pumps ◽

Operating Conditions ◽

Environment Friendly ◽

Factors Affecting ◽

Refrigerant Mixture ◽

Important Direction ◽

Overall Performance ◽

And Performance ◽

Binary Refrigerant

The refrigerant mixtures provide an important direction in selecting new environment-friendly alternative to match the desirable properties with the existing halogenated refrigerants or future use in the new devices, in which, HFCs refrigerants with zero ODP combined with HCs refrigerants with zero ODP and lower GWP are of important value in the fields of application. In the present work, research on HFC125/HC290 (25/75 by mass) binary refrigerant mixture used in heat pumps was carried out, and parameters, factors affecting the performance were investigated, and compared with that of HCFC22 under the same operating conditions. It has been found that the new mixture can improve the actual COP by 2 to 13% and hence it can reduce the energy consumption by 20 to 31.5%. The overall performance has proved that the new refrigerant mixture could be a promising substitute for HCFC22.

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Development of Window-Mounted Air Cap Roller Module

10.20944/preprints201807.0146.v1 ◽

2018 ◽

Author(s):

Heangwoo Lee ◽

Janghoo Seo

Keyword(s):

Energy Consumption ◽

Indoor Environment ◽

Building Energy ◽

Building Energy Consumption ◽

Test Bed ◽

Lighting Energy ◽

Scale Test ◽

And Performance ◽

Indoor Lighting ◽

Indoor And Outdoor

While previous research has shown the use of attachable air-caps on windows to efficiently reduce a building’s energy consumption, the air-caps considered had to be attached to the entire window’s surface, thus limiting the occupants’ view and creating the inconvenience of needing to detach and attach the air-caps. In this study, a window-mounted air-cap roller module using Velcro tape that may be easily attached, detached, and rolled up or down was developed and performance tested in a full-scale test bed. It was found that as the area of the air-caps attached on a window increased, the required indoor lighting energy increased. However, the window insulation improved, thus reducing the cooling and heating energy needed. Attaching the air-caps to the entire window surface effectively reduced the building’s energy consumption, but views through the window may be disturbed. Thus, the developed window-mounted air-caps enable an occupant to reduce the building energy consumption and maintain their view according to their need. The findings of this study may contribute to a reduction in building energy consumption without sacrificing a pleasant indoor environment. Further studies may be needed to verify their efficacy under varying indoor and outdoor conditions.

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Analysis on energy consumption and performance of reheating furnaces in a hot strip mill

International Communications in Heat and Mass Transfer ◽

10.1016/j.icheatmasstransfer.2004.10.019 ◽

2005 ◽

Vol 32 (5) ◽

pp. 695-706 ◽

Cited By ~ 47

Author(s):

W.H. Chen ◽

Y.C. Chung ◽

J.L. Liu

Keyword(s):

Energy Consumption ◽

Hot Strip Mill ◽

Hot Strip ◽

And Performance

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Design and Performance of Small Scale Solar Powered Water Desalination Systems, Utilizing Reverse Osmosis

Journal of Solar Energy Engineering ◽

10.1115/1.1330542 ◽

2000 ◽

Vol 122 (4) ◽

pp. 170-175 ◽

Cited By ~ 7

Author(s):

K. B. Franc¸a ◽

H. M. Laborde ◽

H. Neff

Keyword(s):

High Pressure ◽

Energy Consumption ◽

Feed Solution ◽

Water Desalination ◽

Small Scale ◽

Feed Water ◽

High Pressure Pump ◽

And Performance ◽

Solar Powered ◽

Power Needs

A small scale solar powered desalination system has been designed, analyzed, and optimized with regard to power needs and energy consumption. Both quantities scale linearly with the concentration of the total dissolved salt concentration (TDS) in the feed solution. The desalination of brackish water at a TDS value of 3,000 ppm requires an energy of approximately 1.5 kWh/m3. For seawater at a TDS value of 34,000 ppm, this value increases to 9.5 kWh/m3. The selected type of membrane, the system design, and, in particular, the efficiency of the high pressure pump crucially affect energy consumption. The desalination cost also has been estimated for a small scale system that linearly scale with the TDS value of the feed water. [S0199-6231(00)00104-0]

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