共查询到15条相似文献,搜索用时 78 毫秒
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本文介绍了基于双机头串联逆流的大温差水蓄冷空调系统的工作原理,除湿方式及系统特点。主机部分采用双机头串联逆流,末端部分为组空机组,采用两级表冷,热湿联合处理的形式,同时采用了大温差蓄能,解决了水蓄冷系统蓄冷容积过大的问题。最后将该系统运用于某展厅,此系统与常规系统相比,具有减小设备容量、蓄冷密度大、大幅度减小蓄冷槽体积,利用夜间低价电力蓄冷,大幅减少运行费用的特点。 相似文献
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供热空调系统水力管网流量调节的计算方法 总被引:2,自引:0,他引:2
介绍了回路法和道路法流量调节计算方法的原理,讨论了调节点的数量、位置及调节值大小的确定,以及调节计算中的定解和非定解问题。用实例说明了将道路法应用于供热空调系统水力管网流量调节时的计算方法和步骤,为工程应用提供了理论依据。 相似文献
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双冷源梯级空调系统是一种采用高、低温冷源共同承担系统负荷的新型空调系统,其通过对冷源系统、冷冻水输送系统、空气处理系统和自控系统等四个子系统的优化设计,实现满足系统要求的前提下尽可能节能的目的。针对目前此类研究缺乏整体性分析的缺陷,对冷源系统、冷冻水输送系统、空气处理系统和自控系统的节能率进行了理论分析,并以此为基础建立了双冷源梯级空调系统总节能率分析方法。与常规空调系统相比,该系统总理论节能率为6.85%~39.67%,节能效果显著。所得结论验证了双冷源梯级空调系统的节能效果,提出的总节能率分析方法为双冷源梯级空调系统的工程应用和进一步研究提供了理论依据。 相似文献
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水力失调使管网系统的流体机械效率下降,造成能源浪费.而刻画管道的水力状况基础参数是管路阻况系数.由于实际工程的复杂性,设计的管路况系数与实际值有一定的差别,提出了基于多目标优化的方法对空调冷冻水系统的管路进行阻抗辨识,在辨识的基础之上,对水力状况进行评估和调整,在实际工程中有很高的参考价值. 相似文献
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本文分析了变频调速离心水泵的并联特性和变流量水系统的管路特性,结合具体工程,着重多台变频二级泵并联的自控方案及其摸索和验证过程。并对两级泵变频调速水系统的适用场合和成功不多的原因提出初步看法。 相似文献
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闭式水循环系统的稳定性分析 总被引:2,自引:0,他引:2
针对闭式水循环系统,采用关闭某个支路,进行网络求解,计算其他支路的流量偏离系数的方法,分析了稳定性随各种影响因素的变化规律。结果表明:减小干线阻抗,增大支路阻抗,可以提高系统的稳定性。改变动力的集中调节对系统的稳定性没有影响,改变阻力的集中调节将使系统的稳定性变差。泵的特性曲线对系统的稳定性有影响,平坦型对应的稳定性优于陡降型对应的稳定性。异程系统,离热源最远支路的稳定性最差。同程系统,网路中部的支路稳定性最差;同程系统的稳定性总体上不如异程系统。 相似文献
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Aiming at the great differences between the detached cooling system and the traditional axial cooling system in aspects like system arrangement, matching relationships between the fan and radiators, the flow field distribution and so on, the detached cooling test bench was designed. Experimental study on the detached cooling system with different radiators’ installation angle and position was carried out on the new test bench. Dynamic characteristics like flow resistance and air speed distribution were measured by piezometer tubes and impeller anemometers. Relatively uneven coefficient of the air speed distribution and system matching curve were calculated and analyzed. The results indicate that when the radiator installation angle is within 30°, with the angle increasing, radiator flow resistance decreases and air speed distribution on the radiator surface is more uneven. When the position relationships between radiators change from opposed form to vertical form, radiator flow resistance increases and air speed distribution is more uneven. The matching area between the fan and the detached cooling system locates in the area where the fan pressure is low and the air flow is large. [ABSTRACT FROM AUTHOR] 相似文献
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介绍一种利用蓄能器等普通液压元件,设计出较高精度的静态加载液压系统的方法.通过对蓄能器及其充气压力的合理选择和优化设置,从而实现加载力的高精度控制. 相似文献
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In this research, a hybrid of surrogate model and Multi-island genetic algorithm (MIGA) is proposed for optimization and compensation of steady-state flow force on water hydraulic high-speed on-off valve (HSV) driven by voice coil motor. Firstly, a dynamic model on the spool of HSV is established, and the effects of spool displacement, spool half-cone angle, valve stem diameter and inlet pressure on the steady-state flow force of HSV are analyzed through the CFD simulation. Secondly, a quadratic response surface model is set up based on design of experiment (DOE) to analyze interactions of key parameters on steady-state flow force. MIGA is proposed to optimise the structural parameters of HSV, and the optimization results are analyzed and verified by CFD simulations. Simulation results demonstrate that the steady-state flow force is reduced significantly. Finally, the steady-state flow force in the optimized structure of HSV is also verified experimentally. The experiment results exhibit that the optimized spool can compensate about 71% for the steady-state flow force, then reduce about 15% the energy consumption of HSV. This research will provide the guide for the design and engineering application of HSV. 相似文献