查询词典 refrigerating system

Presents the application of lithium-bromide absorption refrigerating and heating machine with flue gas heat recovery in combined cooling heating and power system.

介绍了烟气余热回收利用型溴化锂吸收式冷热水机在冷热电三联供系统中的应用。

Chooses the flat plate collector,a single-stage LiBr absorption type refrigerating machine and a flat plate solar water heater as the major equipment of the system ...

另外还对该技术进行技术可行性和经济性分析，对于利用现有太阳能热水器技术开发制冷空调具有现实意义。

ABSTRACT Introduces three methods that can adjust refrigerating output according to the variation of load aimed at the varying duty condition during the practical operation process of refrigeration system,frequency inverter technique,parallel unit with several compressors and liquid refrigerant storing method.

摘 要针对制冷系统实际运行过程中存在的变负荷工况，介绍三种根据负荷变化调节制冷量的方法：变频技术、多机并联压缩机组以及液体制冷剂储存方法。

A new special economical experimental unit which applies to the R717 recurrence system of the screw compressor with the economizer has been designed and set up. The experiential results of the single stage recurrence and recurrence with the economizer, such as refrigerating capacity, shaft power, volumetric efficiency etc, under different conditions are got from the experiments. The author analyze and the calculate results of theory in this paper.

建立了独特节能的R717工质带经济器螺杆制冷循环系统的试验装置，通过对所研究压缩机的试验测试，得到了普通单级螺杆循环和带经济器螺杆循环在各种工况下的制冷量、轴功率、容积效率、相对补气量、中间压力等数据，并与了本文理论计算的结果进行了比较分析。

The following exciting results are revealed: 1 When considering the influence of some nonlinear elements such as hard-limit of exciters, the effects of some devices such as Power System Stabilizer and Static Var Compensator which can introduce positive damping in power system, the reasonability of system parameter values in simulation, the SNB surface and HB surface on the boundary of SSSR will turn close to each other and even coalesce together; 2 Under some conditions, coupling between slow exciters and shunt capacitors will bring negative damping in power system dynamics, which increases the possibility of oscillatory instability. So the power system with mass shunt compensators is easily subjected to the oscillatory instability. In recent years, chaotic phenomena of power system have been reported many times. Some simulation studies even found chaos existing inside the power system SSSR. In this dissertation, chaotic phenomena in power systems are thoroughly studied in order to make clear the relation of chaos and SSSR. The following results are derived: 1 Based on Li-Yorke Theorem and their definition on the chaos, the existence of chaos in power system is verified; 2 Three possible routes of causing chaos in power system are found and deeply investigated. They are route of cascading period doubling, route of directly initial energizing and route of torus bifurcation (or quasi-periodicity). The latter two routes are investigated for the first time in power system stability studies; 3 When the stability conditions of chaos are broken, it is found they can lead to voltage collapse, angle divergence, or voltage collapse with angle divergence simultaneously.

针对在电力系统小扰动稳定区域内可能存在混沌吸引域的有关报道，本文深入研究了电力系统混沌现象的出现途径和与系统失稳模式之间的关系：1利用Li-Yorke定理和Li-Yorke的混沌定义，从理论上证明了电力系统混沌现象的存在性；2发现了电力系统中导致混沌出现的三种可能途径：倍周期分岔导致混沌、初始能量直接激发混沌和经由环面分岔导致混沌，并对后两种新发现的途径进行了较为细致的研究；3发现了混沌极限环破裂导致电压崩溃、角度失稳以及电压崩溃和角度失稳同时出现的现象，其中混沌极限环破裂导致系统角度失稳和电压崩溃及角度失稳同时出现的现象均属首次报道；4证明由微分-代数方程描述的系统模型，其小扰动稳定域的边界只包含HB、SNB和SIB三种分岔界面，在SSSR的内部和边界上，均不可能存在会导致混沌的点，从而将混沌现象排除在小扰动稳定域的研究之外，简化了后者的研究工作。

Factory remaining hot water, remaining vapor and boiler heating system, were adopted in tilapia overwintering. Every step, such as site selection, pond and fish preparation, cultivation of fish, fish selection, timing of overwintering, stocking density and managements during overwintering, was compared among three systems. The results of data analysis showed that the survival rate in remaining hot water system was 12% higher than in remaining vapor system and 21.25% higher than in boiler heating system. The overwintering cost in remaining hot water system was 735 Yuan/m~3, which was 18 Yuan lower than in remaining vapor system and 71.4 Yuan lower than in boiler heating system. The profit in remaining hot water system was 201 Yuan/m~3, which was 162 Yuan higher than in remaining vapor system and 275.4 Yuan higher than in boiler heating system.

本论文采取了余热水、余热气、锅炉加温三种方式对进行罗非鱼越冬保种，从地点选择、越冬池、鱼的准备、越冬苗种的培育、越冬前催肥、越冬鱼的选留、越冬鱼进池时间和密度、越冬期间饲养管理等环节进行对比试验获得了三种方式的试验数据并进行了分析讨论，结果显示：余热水越冬雌亲鱼的成活率比余热气越冬高出12％、比锅炉加温越冬高出21.25％；余热水越冬雌亲鱼的成本每立方米为735元比余热气越冬的成本每立方米低18元、比锅炉加温越冬的成本每立方米低71.4元；余热水越冬雌亲鱼的利润每立方米为201元比余热气越冬的利润每立方米高162元、比锅炉加温越冬的利润每立方米高275.4元。

The machine is adjusted to any conditions and areas, refrigerating water and showering water on the Bean Sprout in high temperature area.

我公司生产的豆芽机适合在任何环境与地区下的豆芽生长，在高温地区可将水制冷降温喷洒在豆芽上。

They don't employ chlorofluorocarbons as refrigerating agents, and they can be driven by lower grade energy such as solar energy and industrial waste heat.

吸附制冷采用无CFCs的制冷剂，可以直接由太阳能、工业余热等低品位能源驱动，是节能、开发利用太阳能等新能源的有效工具。

By using the simplified calculation formula of refrigerant of Cleland,draw the coefficient of quick calculation equation of thermodynamic properties,and study the characteristics of the new refrigerant from various angles such as operating efficiency, economy and security.result in the commonly used temperature range of refrigerating air-conditioning, the calculation accu...

借鉴Cleland制冷剂热力性质简化计算公式，拟合出热力性质快速计算方程的系数，并从运行效率、经济性和安全性等角度来研究新型制冷剂的特性。

The control interface implements the simulation of refrigerating,defrosting,cryogen recovery and parameter displaying.

国内院校和培训机构的教学设施相对落后，尤其是没有成熟的制冷装置模拟器。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？