Study of liquid injection impact on the performance of new refrigerant mixtures

In this paper, the test results of liquid injection impact on the performance of new alternative refrigerant mixtures such as: R-410A, R-507, R-407C and R-404A are discussed, analysed and presented. The test results were obtained using an air-source heat pump set-up with enhanced surface tubing under various liquid injection ratios. Performance tests were conducted according to the ARI/ASHRAE standards. The performance data demonstrated that as liquid injection ratio increases, compressor head pressure and discharge temperature decrease. This has a positive effect in protecting the compressor. The effect of liquid injection on mixture behaviour varies from one mixture to another depending upon the mixture's composition. Furthermore, liquid injection appears to have a significant influence on R-410A behaviour compared to the other mixtures in question. Copyright © 2002 John Wiley & Sons, Ltd.     

一种节能型家用空调器季节能效比SEER测试与计算

根据ARI标准,对一种节能型家用空调器季节能效比进行了SEER的测试.并按照我国的几个典型城市的温度分布统计,进行了SEER的计算.计算结果表明,该空调器具有很高的季节能效比,在部分负荷时有显著的节能作用.     

ARI540标准性能数据表示方法的研究与软件实现

对ARI Standard 540标准中性能数据表示方法进行研究；根据该标准的指导，提出合适的优化算法，采用面向对象技术进行了软件实现，并在此基础上对软件的性能和应用领域进辑务瓶，     

Identification of phenolic compounds isolated from pigmented rices and their aldose reductase inhibitory activities

Two anthocyanins (cyanidin-3-O-β-glucoside and peonidin-3-O-β-glucoside) and other phenolic (ferulic acid) were, respectively isolated from black and pigmented brown rices (Oryza sativa L. japonica) and their complete structures were determined by spectroscopic analyses (H NMR, C NMR and MALDI MASS). The HPLC profile of anthocyanins extracted from black rice showed cyanidin-3-O-β-glucoside as the first peak (85%) and peonidin 3-O-β-d-glucoside as the second (15%), while that of pigmented brown rice showed ferulic acid as the first peak (85.7%) and tocols as the second (14.3%). Several tocols were isolated and identified from the unsaponifiable fractions of both rices having some difference on their structures and amounts. The aldose reductase inhibitory activity of isolated compounds was in the following decreasing order: cyanidin-3-glucoside > quercetin > ferulic acid > peonidin-3-glucoside > tocopherol.     

同时镇定：逆LQ方法

本文使用逆ＬＱ方法了同时镇定问题，首先得到了ｒ个正则ＭＩＭＯ对象可静态输出反馈同时定的充要条件，然后给出了状态反馈问题同时镇定的一种解，这些条件均以一组耦合Ｒｉｃｃａｔｉ方程和Ｒｉｃｃａｔｉ不等式的形式给出，本语文证明，任一同时镇定反馈增益均可描述为一组具有合适交叉项的耦合ＬＱ控制问题的解。     

ARI认证通用规则

ARI产品性能认证是美国制冷空调协会对制冷空调行业的制造商开展的一项自愿认证,在国际上具有很高的知名度。本文介绍了ARI认证的通用规则,旨在使我国制冷空调行业的企业和管理部门了解ARI认证的要点,为有出口产品的制造商或国内的认证机构提供参考。     

ARI空调工况与中国空调工况的差异对水冷冷水机组满负荷效率的影响

比较了ＡＲＩ标准空调工况与中国名义空调工况的差异，从制冷循环和传热的角度分析了工况差异对蒸气压缩式水冷冷水机组满负荷效率的影响。指出选用冷水机组时必须重视工况不同对冷水机组性能产生的影响，考虑并满足中国气候和水质条件的要求，以保证机组长期高效可靠运行。     

冷水机组节能驱动与控制系统的选择与计算（一）

本文提出一种方法,在工程设计中,能快速进行列表计算,具有几种不同节能驱动与控制系统的冷水机组的综合部分负荷性能系数IPLV。这些部基于IPLV的标准公式和它们的特性曲线族图表。比较它们的IPLV的计算结果的大小,即能选择高效驱动节能控制系统。     

冷水机组节能驱动与控制系统的选择与计算（三）

本文提出一种在工程设计中能快速列表计算、具有几种不同节能驱动与控制系统的冷水机组的综合部分负荷性能系数LPLV的方法。这些部基于LPLV的标准公式和它们的特性曲线族图表。比较它们的IPLV的计算结果的大小,即能选择高效驱动节能控制系统。关键词冷水机组ARI标准国家标准综合部分负荷性能系数性能系数能效比能耗比驱动特性曲线族图表变频驱动恒速驱动节能驱动与控制系统