Experimental Research of a Two-stage Air-source Heat Pump for Residential Heating

双 级压缩空气源 热泵采暖系统实验研究

Two-stage Cementing Technology in Wulong-1 Well Using Low Density MTC Drilling Pump

乌龙1井低密度MTC钻井 泵 双 级固井工艺

The directions of these studies are as follows : a two-stage compression heat pump system a quasi-two-stage compression heat pump system a single and double stage coupled heat pump system and a cascade heat pump system .

这些研究的方向有 双 级压缩 热泵系统、准双级压缩热泵系统、单双级耦合热泵系统、复叠热泵系统。

Two-stage axial pump can be used as thruster of vessels and it has several advantages such as high efficiency good performance good capability of anti-cavitation more steady and less noise .

双 级轴流 泵可用作船舶的推进装置，具有推进效率高、抗空化能力强、工作平稳、噪声低等优点。

The Cycle and Performance Analysis for Two-stage Absorption Heat Pump Type - ⅱ

Ⅱ型 两 级吸收式 热泵循环及性能分析 级联循环， 阶式循环

Commissioning summarization of a two-stage heat pump test-bed

双 级 热泵实验台的调试总结

Research on Mixture Ratio of Two-stage Series Connection Jet Pump

双 级串联射流 泵混合比的研究

The study on two-stage compression for the air-source heat pump

双 级压缩用于空气源 热泵热水器的性能分析

To reduce energy consumption and improve economics of freeze-dryer a two-stage compression cycle and cascade heat pump cycle for freeze-dryer in which NH3 is used as working medium had been constructed .

为降低冷冻干燥过程的能耗，提高冷冻干燥装置的经济性，构建了以NH3为工质的 二 级压缩和复叠式 热泵冷冻干燥系统。

Hydrodynamic analysis of a waterjet two-stage axial-flow pump based on CFD

喷水推进 双 级轴流 泵流体动力性能CFD分析

Analysis of CO_2 transcritical cycle with two-stage compression for water heating heat pump

CO2跨临界 双 级压缩采暖 热泵 理论分析

Two-stage compression CO2 transcritical heat pump cycle with an expander is studied in order to find the ways and measures to improve the efficiency of the CO2 heat pump .

通过对 双 级压缩带膨胀机CO2跨临界 热泵循环的研究，探讨了旨在提高CO2跨临界循环热泵效率的途径与措施。

Intercooling pattern optimization of two-stage trans-critical carbon dioxide heat pump

双 级压缩跨临界CO2 热泵中间冷却型式优化

Coupling of the two-stage water / water heat pump heating system in the application of Jilin City were studied .

对 双 级耦合水/水 热泵采暖系统在吉林市的应用进行了实验研究。

For an architecture in Beijing the intercooling pattern optimization of a two-stage trans-critical CO_2 heat pump is processed .

以北京市某建筑为对象，进行了 双 级压缩跨临界CO2 热泵中间冷却型式的优化分析。

Development and Performance Analysis of Two-stage Compression Variable Frequency Air Source Heat Pump

双 级压缩变频空气源 热泵系统及其性能分析

Two-stage compression refrigeration cycle was put forward to use in air-source heat pump to solve the low temperature adaptability of ASHP in this paper .

本文提出 双 级压缩制冷循环用于空气源 热泵热水器，以求解决空气源热泵热水器低温适应性问题。

Edwards rotary vacuum pump is a two-stage oil-sealed rotary vane pump operating according to the rotary vane principle .

爱德华真空泵是属于 油封旋片式 机械 真空 泵，日常维护检查的内容为观察 泵 油颜色，查看油位，检查 进、出气口的过滤器。

THE DESIGN AND PERFORMANCE ANALYSIS OF SINGLE-STAGE COMPRESSION REGENERATIVE REFRIGERATION CYCLE USING MIXED REFRIGERANTS Study on Characteristics of the Ejector in Quasi Two-Stage Compression Heat Pump Coupled with Ejector

混合工质单级压缩回热制冷系统的设计与性能分析准 二 级压缩&喷射复合 热泵系统用喷射器的性能研究

Experiment on Two-stage Compression Air-source Heat Pump Water Heater

两 级压缩空气源 热泵热水器实验研究

Presents the two-stage heat pump test-bed designed by the authors analyses the problem existed in experiment and offers the improving method .

介绍了自行设计的 双 级 热泵实验系统，分析了实验中遇到的问题，提出了改进方案。

With comprehensive analysis two-stage compression cycle is applied to air-source heat pump to adapt to the low-temperature environment .

本文通过综合分析，选择将 两 级节流中间不完全冷却 双 级压缩循环应用于空气源 热泵热水器以适用低温工况。

The conclusion shows that using high specific speed impeller in the first step of the two-stage axial flow pump can improve the trust and efficiency of the propulsion system .

针对数据库中现有的水力模型，对模型的所有排列方式进行计算，得到在 两 级轴流 泵中首级采用高比转速的叶轮可以提高喷水推进器的推力和推进效率。

Lithium Bromide Two-Stage Absorption Heat Pump and Its Design

溴化锂 两 级高温吸收 式 热泵及其设计

Impedance of cascade transformer comparison on performances of cascade heat pump and two-stage compression heat pump for freeze - dryer

串级变压器的阻抗复叠式与 二 级压缩式 热泵冷冻干燥 系统 循环特性比较

Characteristics analysis for NASH two-stage cone type water ring vacuum pump

NASH 双 级锥体水环真空 泵特性分析

Three dimensional numerical simulation of flow field inside a two-stage axial pump

双 级轴流 泵内部三维紊动流场CFD分析

Two-stage heat pump system is an important research direction which can acquire high temperature working fluid .

双 级 热泵系统是获得高温工质的一个重要研究方向。

Development of a New-type Serial-parallel Two-stage Centrifugal Pump

新型串并联 双 级离心 泵研制

Design and Test of a New Oil-Gas Separator for Two-Stage Electrical Submersible Pump

新型 两 级电动潜 油泵用油气分离器的设计与试验