风能-流体升压节流致热效应的实验研究  

EXPERIMENTAL STUDY ON WIND ENERGY CONVERTING TO HEAT BY INCREASING FLUID PRESSURE AND FLOW THROTTLING

作　　者：郭新生[1] 赵知辛[1] 唐桂华[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《太阳能学报》2004年第2期157-161,共5页Acta Energiae Solaris Sinica

摘　　要：依据流体节流与摩擦学原理对风能致热效应进行了研究分析与实验。在800W实验装置上,取得了3小时内工质温升近50℃的实验结果,温升曲线与理论分析计算相一致。提出的能量与换热方程,可准确预测风致热装置内工质温升并可作为其换热器的设计依据。分析指出:风力致热的能量利用率高于风力发电的值;风力致热的工质应综合考虑其粘性、定压比热、密度、节流微分效应、温度—饱和蒸汽压力值等因素后优化确定;风轮、液体泵、节流器参数的确定应兼顾额定工况风能利用率及系统的变工况性能。The effect of conversion of wind energy to heat energy on the theory of flow throttle and friction was analyzed. The temperature of working fluid in the tube increased by 50°C in 3 hours on the 800 W experimental set. A rise of fluid temperature during the experiments was consistent with the analytical solution. The energy and heat transfer equations can predict temperature variation of working fluid in the set of wind energy converting to heat and this is benefit for its heat exchanger design. It concluded that the conversion efficiency of wind energy to heat directly was higher than that of wind energy to electricity. As for choosing the working fluid, its integral physical and chemical characteristics such as dynamic viscosity (μ), specific heat (cp), density (ρ), throttle differential effect (α h), temperature-saturated steam pressure (t-P) shoud be optimized. In addition, to design the pneumatic impeller, blade, fluid pump and throttle for a wind power boiler, its performance and operating stability in off-design state its energy conversion efficiency in design state should be considered.

关 键 词：风能 流体摩擦 节流 风致热 

分 类 号：TK81[动力工程及工程热物理—流体机械及工程]