摘要
为得到单罐内熔融盐释热传热规律以提高换热量,分析无隔板下进上出、无隔板上进下出和有隔板上进下出3种不同取热条件下熔盐的释热实验规律。通过对单罐内熔盐温度分布、释热换热器出口温度、释热换热量、能量释放率及释热换热器的瞬时效率5个评价指标对单罐蓄热系统释热性能进行分析。结果表明,单罐系统内布置圆柱形隔板,且以释热介质从蓄热罐顶部流入底部流出的取热形式,熔盐温度出现微小分层,释热换热器出口温度及释热换热量均达到最高,盘管换热器的瞬时效率最高,取热时间最短。此研究结果可为熔盐单罐蓄热系统设计提供依据。
In order to obtain the discharge heat transfer of molten salt in single energy storage tank and improve the heat transfer, the discharge of molten salt with three different energy storage tanks was studied by experiment. Heat discharge performance of single energy storage tank system is analyzed by molten salt temperature distribution, the heat exchanger outlet temperature, transient heat transfer, the energy depletion and heat exchanger effectiveness. The results showed that the single storage tank with a cylindrical baffle and the cold air inlet in the top is the best heat transfer mode. With the baffle, minimal thermal stratification develops within the bulk storage fluid; the heat exchanger outlet temperature and transient heat transfer are both achieved the highest; heat exchanger effectiveness is also the highest and extract time is the least. The results in this paper can be a base for the design of single energy storage tank
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2018年第1期8-13,共6页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51576006)
国家国际科技合作专项(2014DFA60600)
关键词
太阳能
单罐
熔盐
圆柱形隔板
实验研究
solar energy
single tank
molten salt
cylindrical baffle
experiment
