Absorption refrigerators are a class of currently developing refrigerator equipments . they can be driven by some low - grade heat and have great potential for saving energy and decreasing environmental pollution 吸收式制冷机是一类方兴未艾的制冷设备，它们能被低品位热能驱动，对节约能源和减少环境污染潜力很大。
Thermoacoustic engine is a novel device that can convert heat to acoustic energy . it has advantages such as the simplicity , no moving parts , high reliability , long lifetime and no pollution 热声发动机是将热能转化为声能的装置，它结构简单，没有运动部件，运行可靠，寿命长，无污染，且可利用太阳能、废热等低品位能源为动力。
Solar power and other waste heat can be used in the membrane distillation ( md ) process , for which is more economical than other seawater and saline water desalination processes 膜蒸馏海水和苦咸水淡化技术可充分利用太阳能、废热和余热等低品位热源，具有成本低、设备简单、操作容易、能耗低等优点，使膜蒸馏技术在诸多海水淡化工程中有一定的竞争力。
This paper analyses the result of in - situ mining and dump leaching briefly , using kinetics method of certain low quality copper ore in hunan province , get the reaction speed of this ore , and it offers the gist for leaching this ore 摘要简要的对湖南某低品位铜矿石原地破碎浸出进行了动力学分析，得到了此种矿石原地破碎浸出的反应速率，为此种矿石进行浸出提供了依据。
Because the anisotropism of the reservoir is severeness , there are no nature gapping , the reserves abundance is low and the well has no nature off - take potentia , this gas pool is a low permeability , low abundance , deadly low production , low grade complex pool 因储层非均质性严重，无天然气裂缝，储量丰度低，气井无自然产能，又属于低渗低丰度，特低产、低品位复杂气藏。
Adsorption refrigeration uses low - grade thermal energy ( i . e . , solar energy , waste heat ) as its driving and in addition to this , it brings no such pollution problems as caused by cfc and the like , so it is environment benign and energy saving 吸附制冷因可充分利用低品位工业余热以及太阳能作为驱动热源，没有cfc类物质对环境的污染问题，具有环保和节能两大优势，已成为国内外竞相开发的热点。
A new auto - cascade absorption refrigeration cycle was proposed in this thesis to get low temperatures by utilizing low thermal potential energy based on an overall reviews of innovations in absorption cycles during the past decade 本文在研究国内外吸收式制冷循环最新发展动态的基础上，首次提出了一种新型的自行复叠吸收制冷循环，以达到降低吸收制冷机的蒸发温度，利用低品位热能来进行深度冷冻的目的，拓宽吸收制冷机的工程应用范围。
Thermoacoustic prime mover is an absolutely new type of compressor . it has n ' t any moving part so it can work for a long period without maintenance . waste steam and solar energy can be used as its heating - resources so that it has many applications especially for the places having no electricity supply 热声驱动器是一种与常规机械式压缩机完全不同的新型驱动器，它没有机械运动部件，可使用低品位能源，具有结构简单、运行可靠、无维修工作时间长等优点。
Abstract : this paper introduces a kind of special technology to treat low grade molybdate and sodium molybdate which makes frist ammonium leaching of molybdenum up to above 96 % , and frist bases leaching of molybdenum up to above 97 % , with the 0 . 5 % 1 . 0 % of total molybdenum amount washed away and the less than 4 % of molybdenum amount thrown away . consequently , the solution and product has gained arise of high purity 文摘:介绍了处理低品位钼精砂生产钼酸铵及钼酸钠的工艺，钼的一次氨浸率达96 %以上，一次碱浸率达97 %以上，随同废液流失的钼占总投入钼量的0 . 5 % 1 . 0 % ，弃渣含钼小于4 % ，所得溶液及产品纯度高。
In order to investigate the performance of this new cycle , a set of experimental apparatus was designed and setup , a series of experiments using r134a / dmf , r13 + r134a / dmf , r32 + r134a / dmf , and r13 + r134a + r32 / dmf as working fluids respectively were also carried out in this thesis , hi these experiments , this new cycle shows not only its ability to get low refrigerating temperatures but its potential in utilizing low thermal potential energy as driving power 为了验证理论计算的结果，本文在热力性能分析计算基础上，设计了一套完整的实验装置，搭建了实验台，分别以r134a 、 r13 + r32 + r134a 、不同比例混合的r13 + r134a 、 r32 + r134a进行了一系列的实验，并把实验结果进行了分析和比较。结果表明，新循环能够得到较低的制冷温度，并且在利用低品位热源方面具有潜力。
