The Effect of Pitch on Heat Transfer to an Immersed Heat Exchanger in a Solar Thermal Storage Tank With and Without a Baffle

被引:4
|
作者
Nicodemus, Julia Haltiwanger [1 ]
Smith, Joshua [2 ]
Holme, Alexander [2 ]
Johnson, Sarah [2 ]
Petitt, Kyle [2 ]
机构
[1] Lafayette Coll, Engn Studies, Easton, PA 18042 USA
[2] Lafayette Coll, Mech Engn, Easton, PA 18042 USA
关键词
building; fluid flow; heat transfer; heating; solar; NATURAL-CONVECTION; DISCHARGE; RECOVERY;
D O I
10.1115/1.4054668
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The effect of the pitch of a copper coil heat exchanger immersed in a hot water storage tank on heat transfer from the storage tank to the heat exchanger working fluid is investigated. The storage tank is initially quiescent and full of hot water. The heat exchanger located at the top of the tank has a coil diameter just under the tank diameter and has a pitch of 2, 3, 4, 6, or 12 times the heat exchanger diameter, D. The effect of the pitch is explored both with and without a cylindrical baffle, which creates an annular region with the tank wall that has a width of 1.5D and within which the heat exchanger is located. In experiments without the baffle, increasing the heat exchanger pitch improves the rate of heat transfer to the working fluid. The improved heat transfer is attributed to the increased thermal stratification generated by the larger pitches. In experiments with the baffle, the results for experiments with pitches of 2D, 3D, 4D, and 6D are all very similar, with 3D slightly outperforming the others. Heat transfer to the heat exchanger with a 12D pitch was significantly lower than the others. In experiments both with and without the baffle, the larger pitches resulted in more variation in experimental results, despite strict standards for initial and operating conditions. As in the prior work, the presence of the baffle resulted in significantly higher heat transfer rates compared to respective experiments without the baffle.
引用
收藏
页数:12
相关论文
共 50 条
  • [41] Heat Transfer Characteristics of Passive Solar Porous Thermal Storage Wall with Heat Absorption and Storage
    Li, Wei
    Ling, Xiang
    Zeng, Min
    Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics, 2024, 45 (09): : 2707 - 2713
  • [42] Thermal performance of a vertical solar hot water storage tank with a mantle heat exchanger depending on the discharging operation parameters
    Arslan, Mevlut
    Igci, Atila Abir
    SOLAR ENERGY, 2015, 116 : 184 - 204
  • [43] An experimental study on the heat transfer performance of a prototype molten-salt rod baffle heat exchanger for concentrated solar power
    Qiu, Yu
    Li, Ming-Jia
    Wang, Wen-Qi
    Du, Bao-Cun
    Wang, Kun
    ENERGY, 2018, 156 : 63 - 72
  • [44] Thermal behavior of a heat exchanger module for seasonal heat storage
    Fan, Jianhua
    Furbo, Simon
    Andersen, Elsa
    Chen, Ziqian
    Perers, Bengt
    Dannemand, Mark
    1ST INTERNATIONAL CONFERENCE ON SOLAR HEATING AND COOLING FOR BUILDINGS AND INDUSTRY (SHC 2012), 2012, 30 : 244 - 254
  • [45] Simulation of convective heat removal in a stratified tank of the integrated collector storage solar water heater with builtin heat exchanger
    Oshchepkov M.Y.
    Frid S.E.
    Applied Solar Energy, 2016, 52 (1) : 40 - 46
  • [46] Thermal synthesis of a thermochemical heat storage with heat exchanger optimization
    Fopah-Lele, Armand
    Kuznik, Frederic
    Osterland, Thomas
    Ruck, Wolfgang K. L.
    APPLIED THERMAL ENGINEERING, 2016, 101 : 669 - 677
  • [47] Heat transfer studies on solar still assisted with and without latent heat storage material
    Vigneswaran, V. S.
    Kumaresan, G.
    Elansezhiyan, S.
    Velraj, R.
    DESALINATION AND WATER TREATMENT, 2019, 140 : 1 - 6
  • [48] Numerical and Experimental Investigation on Heat Transfer Performance of a Solar Single Storage Tank
    Mao Qianjun
    Li Ying
    Zhang Yamei
    Zhang Chunzhi
    JOURNAL OF THERMAL SCIENCE, 2021, 30 (05) : 1596 - 1606
  • [49] Energy storage in latent heat storage of a solar thermal system using a novel flat spiral tube heat exchanger
    Ardahaie, S. Saedi
    Hosseini, M. J.
    Ranjbar, A. A.
    Rahimi, M.
    APPLIED THERMAL ENGINEERING, 2019, 159
  • [50] Numerical and Experimental Investigation on Heat Transfer Performance of a Solar Single Storage Tank
    Qianjun Mao
    Ying Li
    Yamei Zhang
    Chunzhi Zhang
    Journal of Thermal Science, 2021, 30 : 1596 - 1606