Results 1 to 10 of about 294,205 (105)

Analysis on Thermodynamic Perfectibility of Room Air Conditioners

open access: yesZhileng xuebao, 2013
According to analysis on the energy efficiency standards of the constant speed room air conditioner and the variable speed type, differences between the two kinds of air conditioners exist in division standard, grades of energy efficiency and outdoor ...
Li Xiaofeng, Ma Yitai, Yan Qiuhui
doaj   +3 more sources

Analysis on Energy Efficiency of Water Chiller and Water Source Heat Pump Systems with Thermodynamic Perfectibility

open access: yesZhileng xuebao, 2012
To set up a platform for evaluating energy efficiency of water chiller and water source heat pump systems with EER or COP, the method of the second thermodynamic perfectibility was introduced.
Ma Yitai   +4 more
doaj   +2 more sources

Environmental Performance Evaluation of Refrigeration and Heat Pump on the Basis of Nature Degree and Thermodynamic Perfectibility

open access: yesZhileng xuebao, 2012
Based on sustainable development concept, consideration of natural quality of refrigeration system, a new evaluation methodology has been proposed for the environmental performance of refrigeration and heat pump system with conjunction of the natural ...
Ma Yitai   +3 more
doaj   +2 more sources

Comprehensive performance analysis of cascade refrigeration system with two-stage compression for industrial refrigeration

open access: yesCase Studies in Thermal Engineering, 2022
The cascade refrigeration system with two-stage compression (CRST) with R1150/R717 as the refrigerant group was studied to replace the three-stage cascade refrigeration system (TCRS) with R1150/R41/R717 as the refrigerant group, aiming to improve the ...
Zhili Sun, Yi’an Wang
doaj   +1 more source

Comprehensive Analysis of Performance of Air Cooled Multistage Thermoelectric Cooler

open access: yesShanghai Jiaotong Daxue xuebao
The multistage thermoelectric cooler can provide a larger temperature difference, but its refrigeration and economic performance decreases rapidly with the increase of stages.
SUN Yuetong, MENG Fankai, ZHOU Lin, XU Chenxin
doaj   +1 more source

Theoretical Framework of Performance Consistency Index and Its Application in Operational Diagnostics for Air-Source Heat Pumps

open access: yesZhileng xuebao
In the operational diagnosis of air-source heat pumps, the conventional coefficient of performance faces limitations in distinguishing environmental effects from equipment performance degradation due to its dependency on operating conditions.
Yang Qiang   +7 more
doaj   +2 more sources

Unfit for the future? The depoliticization of human perfectibility, from the Enlightenment to transhumanism

open access: yesEuropean Journal of Social Theory, 2018
An intellectual and cultural movement advocating a radical enhancement of human performance via technoscientific and biomedical advances, transhumanism has grown in notoriety in recent years.
Nicolas le Dévédec
exaly   +2 more sources
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