王如竹
1.对吸附式制冷循环及其应用作了系统研究。 2.深入研究了超流氦稳态与非稳态传热特性。 3.发明了太阳能及空气能热泵热水器。
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- 姓名:王如竹
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学术头衔:
博士生导师
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学科领域:
制冷与低温工程
- 研究兴趣:1.对吸附式制冷循环及其应用作了系统研究。 2.深入研究了超流氦稳态与非稳态传热特性。 3.发明了太阳能及空气能热泵热水器。
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【期刊论文】吸附制冷中CaCl2-NH3的化学吸附前驱态研究*
王如竹, 王丽伟, 王如竹**, 吴静怡, 王凯
中国科学 E 辑 工程科学 材料科学 2005, 35(1): 31~42,-0001,():
-1年11月30日
作为一种化学吸附制冷工质对,在吸附制冷条件下,CaCl2-NH3在发生化学吸附之前,由于van der Waals力相对于化学反应力作用距离比较长,所以一般要先发生物理吸附. 这个状态称为化学吸附前驱态. 通过控制氯化钙不同的膨胀、结块现象,在氨络合物的屏蔽系数作用下实现NH3气体分子与Ca2+之间不同的距离长度,从而得到了不同的化学吸附前驱态. 结果表明,吸附剂发生严重膨胀现象而没有发生结块现象时,由于化学吸附前驱态中NH3气体分子与Ca2+之间距离较长,吸附过程所需要的活化能增加,吸附剂在反复的吸附、解吸过程中出现衰减现象. 而在吸附剂发生结块现象时,由于NH3气体分子与Ca2+之间距离受到有限空间的控制,从化学吸附前驱态过渡到化学吸附态所需要的活化能相对较小,其吸附性能不再出现衰减趋势. 利用化学吸附前驱态研究了吸附制冷等压线,结果也表明,在Ca2+的分布没有对NH3气体分子的渗透性能产生影响的前提下,化学吸附前驱态对试验结果起着决定性作用.
制冷,, 化学吸附,, 化学吸附前驱态,, 衰减,, 活化能
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王如竹, 王丽伟
科学通报,2005,52(2):101~111,-0001,():
-1年11月30日
吸附制冷技术作为一种低品位热能驱动的绿色制冷技术, 目前已经成为国际上普遍关注的一个学术方向. 文中简述了吸附制冷技术的发展历史, 评述了吸附制冷技术在吸附剂、吸附理论、热量回收过程、吸附床技术方面的进展, 阐述了近几年来吸附制冷方面的典型研究成果与典型样机, 最后指出了吸附制冷技术今后的主要发展方向.
吸附制冷,, 吸附剂,, 制冷循环,, 传热,, 传质
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【期刊论文】Experimental study on a continuous adsorption water chiller with novel design
王如竹, Y.L. Liu, R.Z. Wang*, Z.Z. Xia
International Journal of Refrigeration 28(2005)218-230,-0001,():
-1年11月30日
A newly developed adsorption water chiller is introduced and tested. In the new adsorption refrigeration system, there are no refrigerant valves, the problem of mass transfer resistance resulting in pressure drop along refrigerant passage in conventional systems when methanol or water is used as refrigerant can be absolutely solved. Silica-gel-water is used as working pair and mass recovery-like process is adopted in order to use low temperature heat source ranging from 70 to 85 8C effectively. The experiment results demonstrate that the chiller (26.4kg silica-gel in each adsorber) has a cooling capacity of 2-7.3kW and COP ranging 0.2-0.42 according to different evaporating temperatures. Based on the experimental tests of the first prototype, the second prototype is designed and tested; the experimental data demonstrate that the chiller performance has been greatly improved, with a heat source temperature of 80℃, a COP over 0.5 and cooling capacity of 9 kW has been achieved at evaporating temperature of 13℃.
Design, Adsorption system, Water chiller, Water, Silica gel, Experiment, Performance, COP
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【期刊论文】A new method for the measurement of solar collector time constant
王如竹, H.J. Hou a, b, Z.F. Wang c, R.Z. Wang a, *, P.M. Wang c
Renewable Energy 30(2005)855-865,-0001,():
-1年11月30日
A new test method about the time constant of the solar collector has been presented in this paper. It is simple and has been validated through experiments. With the new method it is not necessary to adjust the inlet temperature of the transfer fluid as closely as possible to the ambient air temperature. Also, it is not necessary to know the characteristic parameters of the collector in advance. The model used in the paper is a first order system model, as in most cases. The experimental data obtained from the test of solar collector time constant shows that the solar collector is not a strictly first order system. A criterion is proposed to decide whether the system is a first order system or not and the resemblance of the system to the first order system.
Solar collector, Time constant, Firstorder system
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王如竹, Y.Z. Lu, R.Z. Wang *, S. Jianzhou, Y.X. Xu, J.Y. Wu
Applied Thermal Engineering 24(2004)1051-1059,-0001,():
-1年11月30日
Experimental studies on the practical performance of an adsorption air conditioning system powered by exhausted heat from a diesel locomotive are presented. The system incorporates one adsorbent bed and utilizes zeolite-water as a working pair to provide chilled water for conditioning the air in the driver s cab of the locomotive. Performance tests under different running conditions have been carried out. Experimental results show that the suggested adsorption system is technically feasible and can be applied for space air conditioning of the locomotive driver s cab, except the case when the locomotive tracts a way train. The average refrigeration power ranging from 3.0 to 4.2kW has been obtained under typical running conditions.
Adsorption, Air conditioner, Zeolite-water, Diesel locomotive, Driver', s cab
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【期刊论文】Performance of a Diesel LocomotiveWaste-Heat-Powered Adsorption Air Conditioning System
王如竹, Y.Z. LU, R.Z. WANG*, S. JIANZHOU, M. ZHANG, Y.X. XU AND J.Y. WU
Adsorption 10: 57-68, 2004,-0001,():
-1年11月30日
An innovative exhausted-heat-powered solid adsorption air conditioning system with zeolite-water as working pair is designed for providing air-conditioning for the driver's cab of a diesel locomotive. Only one adsorber is used in the system and a cold storage water tank is attached to provide cooling during generation process to ensure the continuous cooling output. Experiments on the laboratory prototype have been carried out and a mean cooling power output of about 3.3kW is obtained when the condensing temperature and the evaporating temperature are 40℃ and 7℃ respectively. The influences of some operating conditions on the system performance are analyzed by simulation and experiments. The results of the performance testing of the prototype installed in a diesel locomotive are also discussed as well. An average cooling power of 4.1kW is got under typical summer condition. It is proved that such a system is quite competitive even if a little bit heavier.
adsorption,, zeolite,, air conditioning,, exhausted heat,, diesel locomotive
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【期刊论文】Adsorption performances and refrigeration application of adsorption working pair of CaCl2-NH3
王如竹, WANG Liwei, WANG Ruzhu, WU Jingyi & WANG Kai
Science in China Ser. E Engineering & Materials Science 2004 Vol. 47 No.2 173-185,-0001,():
-1年11月30日
The adsorption performance of CaCl2-NH3 is studied under the condition of different expansion spaces for adsorbent, and the relationships between adsorption performance of CaCl2-NH3 and the phenomena of swelling and agglomeration during adsorption are researched. It is found that the performance stability is related to the ratio of expansion space to the volume of adsorbent ras, and the performance attenuation is serious in the case of large ras. Severe adsorption hysteresis exists in the process of adsorption and desorption at the same evaporating and condensing temperatures, which is related to the stability constant of chemical reaction. This phenomenon cannot be explained by the theory of physical adsorption. Moderate agglomeration will be beneficial to the formation of ammoniate complex; the magnitude of expansion space will affect adsorption performance. Analysis shows that the activated energy needed in the process of adsorption for the sample with ras of 2:1 is less than that for the sample with ras of 3:1. The refrigeration performance of CaCl2-NH3 is predicted from experiments. The cooling capacity of one adsorption cycle is about 945.4kJ/kg for the adsorbent with an ras of 2:1 at the evaporating temperature of 0℃.
chemical adsorption,, attenuation,, adsorption hysteresis,, ammonia,, activated carbon,, refrigeration.,
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王如竹, 郑晓红①, 李可俊②, 王如竹①*, 赵立平②, 徐学敏②*, 陈亚珠②, 晋新桥①, 谷波①, 白景峰②, 刘宏敏①, 叶小江①
科学通报,2003,48(24):2510~2514,-0001,():
-1年11月30日
对一种高压静电场与紫外线照射相结合的复合净化除病毒技术进行了实验研究,旨在寻长有效杀死空气中的病毒,特别是SARS病毒的方法,为空调系统空气净化处理提供配套技术。建立了中央空调室内环境模拟系统,利用超声雾化噬菌体储备液形成稳定的病毒气溶胶源,用明胶与素琼脂双层平板通过气流冲击法回收噬菌体,以检测净化装置除尘、杀病毒效果。结果表明,采用该技术在实际应用中对PM10的过滤系数在86%以上,在试验系统中的除病毒效率可达95%.通过本课题研究建立了试验平台,并获得了工程应用验证。
高压静电,, 紫外线,, 噬菌体病毒,, 中央空调
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王如竹, Y.Z. Lu, R.Z. Wang *, M. Zhang, S. Jiangzhou
Energy Conversion and Management 44(2003)1733-1743,-0001,():
-1年11月30日
Adsorption cold storage has lately attracted attention for its large storage capacity and zero cold energy loss during the storing process. Thermodynamic and experimental studies on the cold storage capacity and the cold discharging process, in which the adsorber is either air cooled or adiabatic, have been presented. An adsorption cold storage system with zeolite-water working pair has been developed, and some operating results are summarized. This system is used for providing air conditioning for the driver s cab of an internal combustion locomotive. Unlike a normal adsorption air conditioner, the system starts running with the adsorption process, during which the cold energy stored is discharged, and ends running with the generation process. The adsorbent temperature decreases during the cold storing period between two runs. The refrigeration power output for the whole running cycle is about 4.1kW. It appears that such a system is quite energetically efficient and is comparatively suitable for providing discontinuous refrigeration capacity when powered by low grade thermal energy, such as industrial exhausted heat or solar energy.
Adsorption, Cold storage, Exhaust heat, Locomotive
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【期刊论文】Pore structure of new composite adsorbent SiO2
王如竹, LIU Yefeng & WANG Ruzhu
SCIENCE IN CHINA (Series E) 2003, 46 (5): 551~559,-0001,():
-1年11月30日
A new composite adsorbent SiO2·xH2O·yCaCl2 which is composed of macro-porous silica gel and calcium chloride is introduced. In order to analyze its adsorption theory, adsorption and desorption isotherms, BET surface areas, pore volumes and average pore diameters of macro-porous silica gel and four composite adsorbent samples with different CaCl2 content are measured using SEM and Asap2010 apparatus. From the adsorption isotherms, desorption isotherms and lag loops, it can be deduced that the main pore structure in macro-porous silica gel and the new composite adsorbent have two shapes: taper with one top open and taper or hyperbolic taper with both ends open. Based on the analysis of pore diameter distribution and lag loop, a sketch map showing calcium chloride filled in pore of macro-porous silica gel is presented. The adsorption isotherms at 25℃ are measured. Experimental results show that the new composite adsorbent can adsorb more water than common adsorbents (macro-porous silica gel, micro-porous silica gel and synthetic zeolite 13X). In the light of the results of pore structure, adsorption isotherms and lyolysis phenomenon are analyzed.
composite adsorbent,, lag loop,, pore structure,, pore diameter distribution,, adsorption isotherm
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