This paper will focus on the development of polyol ester based lubricants for use with HFC refrigerants, and the impact that the properties of the lubricant in the presence of the refrigerants have on the refrigeration system. The suitability of these types of lubricants with these refrigerants ...
有线电视HFC接入网络的改造与优化有线电视HFC接入网络改造优化光纤电缆混合接入网目前,国内大多数有线电视网络已在不同程度上进行了HFC的建设,网络质量有了大幅度提高,但在相当长的时间内还会存在同轴电缆接入网的改造和优化问题,其主要目的是张学斌,刘碧波
尚切屯仄私峁沟纳杓 北海市有线电视HFC网络过渡星型拓扑结构的设计北海市有线电视HFC网络过渡星型拓扑结构的设计HFC,星型,过渡本文介绍了北海市HFC网络过渡星型拓朴结构的设计,并从4个方面阐述了该设计的依据.林以惠,陈大戈WanFang西部广播电视
2.(1)氟里昂是freon的音译名,氟里昂的商业代号可用hfc-nmp表示,其中数字n等于碳原子数目减1(如果是0就省略),数字m等于氢原子数目加1,数字p等于氟原子数,氯原子数目不列.则氟里昂ch 2 f-chf 2 的代号为hfc-143,它属于bc(填“一卤代烃”“多卤代烃”“不饱和卤代烃”“芳香卤代烃”)类有机物,其同分异构体...
本发明涉及一种应用于HFC网络的数据报文传输方法,包括:网关与客户端协商某一待传输的数据报文流的标识方式,同步该数据报文流的上下文信息;客户端记录该数据报文流对应的上下文信息;网关对待传输的数据报文流的报文进行压缩,并根据数据报文流的标识方式为压缩后的数据报文添加报文流标识,然后向客户端发送;客户端根据数据...
METHOD AND DEVICE FOR SUPPORTING TDMA OPERATION THROUGH HYBRID FIBER COAXIAL(HFC) CHANNEL OR OTHER CHANNELSPROBLEM TO BE SOLVED: To effectively perform time division multiple access by establishing synchronism while using a time marker in order to receive and process an upstream data packet when the...
通过热压烧结合成了致密的Ta 4 HfC 5 -Si 2 BC 3 N陶瓷, 所得复相陶瓷由Ta 4 HfC 5 , SiC和BN(C)相组成. 在2100°C下, 随着晶粒的快速生长, 陶瓷内形成了"蝌蚪"状的SiC和BN(C)连接相, 断裂韧性提高到3.47 ± 0.12 MPa m 1/2 . 随着烧结温度的升高, Ta 4 HfC 5 晶粒的生长活化能从112.4 ...
本公开提供了包含三氟碘甲烷(CFI)和六氟丙酮(HFA)的共沸物或类共沸物组合物,以及形成共沸物或类共沸物组合物的方法,该方法包括将六氟丙酮(HFA)和三氟碘甲烷(CFI)组合以形成共沸物或类共沸物的步骤,该共沸物或类共沸物包含六氟丙酮(HFA)和三氟碘甲烷(CFI),在约14.40psia±0.30psia的压力下具有约29.84℃±...
The present invention provides a refrigerant composition having performance such as ASHRAE non-flammability, a large refrigerating capacity, a GWP lower than that of HFC-134a, and a COP that is equal to that of HFC-134a.A refrigerant composition comprising HFO-1234ze(E) and HFC-134, which is...
The recycling is realized by means of a fluorine-chlorine exchange reaction with HFC-23 and a halogenated hydrocarbon. The catalyst for the fluorine-chlorine exchange reaction comprises a main body catalyst and a precious metal. The precious metal is selected from at least one of Pt, Pd, Ru,...