Following differences from conventional vapor compression refrigeration cycle was found: there is an optimal discharge pressure at which COP reaches maximum;the optimum pressure is sensitive to the outlet temperature of cooler,as the evaporating temperature decrease,special refrigerating output firstly increases and finally decreases;COP takes oscillation as suction temperature increase and the.
分析了带膨胀机的二氧化碳跨临界循环变工况特性,发现它与传统的蒸汽压缩式制冷循环不同的特点:循环存在一个最佳排气压力使COP最大,且最佳排气压力对冷却器出口温度的变化比较敏感;随蒸发温度的下降,单位质量制冷量先增大后减小;COP随着吸气温度的增加呈现振荡变化,且振荡变化的总体趋势是降低,带膨胀机吸气过热为无效过热的系统安装回热器有助于COP的提高。
The application of fuzzy adaptive PID solves the unstable problem of suction temperature and suction pressure which is caused by intercoupling and the difficult problem of adjusting PID parameter for different testing conditions is also solved.
6~35kW制冷量全自动压缩冷凝机组性能测试系统中,通过优化量热器和管路设计并采用模糊自适应PID控制代替目前常用的PID控制,解决了系统测试冷量范围大P、I、D参数整定困难以及被控参数互相耦合导致吸气温度和吸气压力无法同时达到稳定的问题,实现了对制冷系统中吸气温度及吸气压力的精确控制,使参数控制精度满足标准JB/T 9056-1999对压缩冷凝机组性能测试的要求,并给出了该系统模糊自适应PID控制的基本设计过程。
The performance of the inlet temperature are analyzed,the cascade control technology are adopted by regarding the pressure of the second refrigerator as the vice adjustment parameter.
分析了制冷压缩机吸气温度回路的特性 ,采用串级技术以量热器内第二制冷剂压力为副调参数组成串级系统 ,削弱了过程参数间的耦合影响 ,有效克服了二次干扰 ,实现了制冷压缩机吸气温度的快速稳定的控
Study of Suction Temperature and Pressure Controlling Method for Refrigeration Compression Condensing Unit Performance Test SystemUniversity of shanghai for Science and Technology
压缩冷凝机组吸气温度及吸气压力精确控制的研究
Study on Temperature Dependence of Ultraviolet Absorption Cross Sections of Ammonia
温度对NH_3气体紫外吸收截面影响研究
The higher the temperature of the air , the more water vapor can it absorb.
空气的温度越高，它能吸收的水蒸气就越多。
causing difficulty in breathing especially through lack of fresh air and presence of heat.
导致呼吸困难，特别是缺少新鲜空气以及温度高。
The higher the temperature of the air, the more water vapour it can absorb.
空气的温度越高，它能吸收的水蒸汽就越多。
Study of Gas Temperature Measurement Method Based on Spectrum Absorption
基于吸收光谱气体温度测量方法的研究
The adsorption of nitrogen on ZSM-5 zeolite above ambient temperature seems to be very much dependent upon pretreatment conditions and adsorption temperature.
高于环境温度时,氮气在ZSM-5沸石上的吸附似在很大程度上取决于预处理条件和吸附温度。
Effect of air temperature and desorption on oxygen generation by pressure swing adsorption
气源温度与解吸过程对变压吸附制氧效果的影响
High ambient temperature, high humidity and high temperature of cooling water in Summer lead to low vapour vacuum and serious humidity of urea product.
夏季环境气温高,空气湿度大,冷却水温度高,导致蒸发真空度低,成品尿素吸湿严重。
During the compression(or blast)phase, the temperature of the air rises and during the decompression(or suction)phase it falls.
在压缩（或爆震）周相下，空气温度上升，在非压缩（或吸收）周相下，空气温度则就下降。
Temperature Compensation to Concentration of Polluted Gases in In-situ Measurement with DOAS Method
差分吸收光谱技术在线监测污染气体浓度的温度补偿
heat absorbed by a unit mass of a material at its boiling point in order to convert the material into a gas at the same temperature.
在沸点时一单位质量的物质为在同一温度下变成气体所吸收的热。
Study on influence of gas temperature of oxygen therapy on patients with respiratory system infectious diseases
氧疗气体温度对呼吸系统感染性疾病病人影响的研究
grasslands sink CH4 from atmosphere.
CH4吸收通量与气温和地温有较好的
tracheal air stream temperature detector
气管气流温度测量器
The fact that nitrogen adsorption becomes noticeable only at high temperature is an indication that the adsorption is a highly activated process.
氮气的吸附只是在高温下才变得明显这一事实说明吸附是一个高度活化的过程。
Physical examination on admission. Body temperature 39.8 c.She was found t0 be slightly dyspnea. The right lower posterior chest showed dullness on percussion with moist rales at the end of inspiration on auscultation.
入院查体:体温39.8℃。轻度呼吸困难。右后下胸部叩诊有浊音,听诊于吸气未闻湿啰音。
warmth, oxygen from sunlight and wetness.
温度、氧气、闭光和湿度。