Results 41 to 50 of about 522,153 (213)

Fundamentals of Energy-Efficient Wireless Links: Optimal Ratios and Scaling Behaviors

2024 IEEE 99th Vehicular Technology Conference (VTC2024-Spring)
In this paper, we examine the energy efficiency (EE) of a base station (BS) with multiple antennas. We use a state-of-the-art power consumption model, taking into account the passive and active parts of the transceiver circuitry, including the effects of radiated power, signal processing, and passive consumption.
Anders Enqvist, Özlem Tugfe Demir, Cicek Cavdar, Emil Björnson   +3 more
openaire   +4 more sources

Indicators of energy efficiency: An international comparison [PDF]

, 1990
The United States has long been accused of being energy inefficient based on a comparison of energy intensities among the industrialized countries. Energy intensity is commonly measured by computing the ratio of energy use per unit of Gross Domestic ...

core   +1 more source

Improvement of Multi-functional Air-conditioning Water Heaters

Zhileng xuebao, 2015
An improved multi-functional air-conditioning water heater is devised to solve the problem of frequent starts and stops of fan, which always occurs while a traditional one produces hot water in summer. The improved multi-functional air-conditioning water
Wang Haifeng, Li Yuduo, Yuan Huihui, Sun Yajuan, Zhang Shoubing, Dong Shanshan   +5 more
doaj  

Low Temperature Drying With Air Dehumidified by Zeolite for Food Products: Energy Efficiency Aspect Analysis

, 2011
Developments in low temperature drying of food products are still an interesting issue; especially with respect to the energy efficiency. This research studies the energy efficiency that can be achieved by a dryer using air which is dehumidified by ...
Straten, G., van, Asselt, C.J., van, Sanders, J.P.M., Boxtel, A.J.B., van, Djaeni, M., Bartels, P.V.   +5 more
core   +1 more source

Improving Energy Efficiency in Hotels Through Evolutionary Digital Twin Technology: A Conceptual Framework and Empirical Evidence

Buildings
This study investigates the use of digital twin technology, machine learning (ML), and artificial intelligence (AI) to improve energy efficiency. It focuses on the heating, ventilation and air conditioning (HVAC) systems in hotel buildings which rely on ...
Rosana W. M. Wong, Becky P. Y. Loo
doaj   +1 more source

Research on Matching Optimal State Points of Air Conditioning Performance

Zhileng xuebao, 2020
In order to match the best state point of air-conditioning performance, this paper selects an air conditioning unit with a refrigerating capacity of 5.15 kW as a research object.
Yu Zhen, Chen Haining, Pan Likui, Wang Fuqiang   +3 more
doaj  

Modelling tidal energy extraction in a depth-averaged coastal domain

, 2010
An extension of actuator disc theory is used to describe the properties of a tidal energy device, or row of tidal energy devices, within a depth-averaged numerical model This approach allows a direct link to be made between an actual tidal device and its
M.L.G. Oldfield, Oldfield, M. L. G., Draper, S., Oldfield, MLG, Houlsby, Guy, S. Draper, Draper, S, Borthwick, AGL, Borthwick, A. G. L., A.G.L. Borthwick, Houlsby, G. T., Houlsby, GT, G.T. Houlsby   +12 more
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Effect of Relative Position of Two Sets of Outdoor Units Installed in Groove on Surrounding Thermal Environment

Zhileng xuebao, 2017
The installation conditions of two outdoor units were examined experimentally in an enthalpy-potential laboratory platform in this study. The influence of three installation conditions of outdoor unit on the surrounding thermal environment, air ...
Jin Wufeng, Liu Shuo, Xu Lei, Ren Liyue
doaj  

Evaporative Air Coolers Optimization For Energy Consumption Reduction And Energy Efficiency Ratio Increment

, 2015
Significant quota of Municipal Electrical Energy consumption is related to Decentralized Air Conditioning which is mostly provided by evaporative coolers. So the aim is to optimize design of air conditioners to increase their efficiencies. To achieve this goal, results of practical standardized tests for 40 evaporative coolers in different types ...
Torkaman, Leila, Ghassembaglou, Nasser
openaire   +2 more sources

The Effect of Nozzle Configuration on Adsorption-Chiller Performance

Energies
Broadly defined climate protection is a powerful incentive in the search for environmentally friendly refrigeration technologies. Adsorption chillers are considered to be one such technology; however, their main disadvantages include a low cooling ...
Wojciech Kalawa, Karol Sztekler, Jakub Kozaczuk, Łukasz Mika, Ewelina Radomska, Wojciech Nowak, Andrzej Gołdasz   +6 more
doaj   +1 more source