Liquid side heat transfer and pressure drop in finned-tube cooling-coils operated with secondary refrigerants
(2007) In International Journal of Refrigeration 30(7). p.1278-1289- Abstract
- In this study full-scale experiments with two different conventional cooling-coils aimed for display cabinets were performed. Heat transfer and pressure drop on the liquid side for three different single phase secondary refrigerants were studied and compared to predictions by existing correlations. Predominantly, the laminar flow regime was studied. The results show that when predicting the heat transfer performance on the liquid side of a cooling-coil the Gnielinski correlation for thermally developing flow and uniform wall temperature boundary conditions (T) leads to good agreement for 0.0014<x*<0.017 if 50 < Re < 1700, assuming a new entrance length is formed after each U-bend. In addition, these entrance lengths must also... (More)
- In this study full-scale experiments with two different conventional cooling-coils aimed for display cabinets were performed. Heat transfer and pressure drop on the liquid side for three different single phase secondary refrigerants were studied and compared to predictions by existing correlations. Predominantly, the laminar flow regime was studied. The results show that when predicting the heat transfer performance on the liquid side of a cooling-coil the Gnielinski correlation for thermally developing flow and uniform wall temperature boundary conditions (T) leads to good agreement for 0.0014<x*<0.017 if 50 < Re < 1700, assuming a new entrance length is formed after each U-bend. In addition, these entrance lengths must also be accounted for, when predicting the pressure drop on the liquid side of the cooling-coil. The uncertainty of measurement can be a problem in this type of investigations and this has been taken into consideration when analysing the results. (C) 2007 Elsevier Ltd and IIR. Ail rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/654310
- author
- Haglund Stignor, Caroline LU ; Sundén, Bengt LU and Fahlen, Per
- organization
- publishing date
- 2007
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- secondary refrigerant, pressure drop, heat transfer, experiment, finned tube, heat exchanger, refrigeration, display cabinet, propylene glycol, laminar flow
- in
- International Journal of Refrigeration
- volume
- 30
- issue
- 7
- pages
- 1278 - 1289
- publisher
- Elsevier
- external identifiers
-
- wos:000250149400016
- scopus:34548481552
- ISSN
- 0140-7007
- DOI
- 10.1016/j.ijrefrig.2007.02.007
- language
- English
- LU publication?
- yes
- id
- ef1c4264-ddd4-455f-9cd3-813f77ec1a11 (old id 654310)
- alternative location
- http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V4R-4N49VN3-2&_user=745831&_coverDate=11%2F30%2F2007&_alid=695614625&_rdoc=2&_fmt=full&_orig=search&_cdi=5765&_sort=d&_docanchor=&view=c&_ct=17&_acct=C000041498&_version=1&_urlVersion=0&_userid=745831&md5=d257ced3e8a31651c7a17d7b239ce146
- date added to LUP
- 2016-04-01 17:12:59
- date last changed
- 2022-01-29 01:11:44
@article{ef1c4264-ddd4-455f-9cd3-813f77ec1a11,
abstract = {{In this study full-scale experiments with two different conventional cooling-coils aimed for display cabinets were performed. Heat transfer and pressure drop on the liquid side for three different single phase secondary refrigerants were studied and compared to predictions by existing correlations. Predominantly, the laminar flow regime was studied. The results show that when predicting the heat transfer performance on the liquid side of a cooling-coil the Gnielinski correlation for thermally developing flow and uniform wall temperature boundary conditions (T) leads to good agreement for 0.0014<x*<0.017 if 50 < Re < 1700, assuming a new entrance length is formed after each U-bend. In addition, these entrance lengths must also be accounted for, when predicting the pressure drop on the liquid side of the cooling-coil. The uncertainty of measurement can be a problem in this type of investigations and this has been taken into consideration when analysing the results. (C) 2007 Elsevier Ltd and IIR. Ail rights reserved.}},
author = {{Haglund Stignor, Caroline and Sundén, Bengt and Fahlen, Per}},
issn = {{0140-7007}},
keywords = {{secondary refrigerant; pressure drop; heat transfer; experiment; finned tube; heat exchanger; refrigeration; display cabinet; propylene glycol; laminar flow}},
language = {{eng}},
number = {{7}},
pages = {{1278--1289}},
publisher = {{Elsevier}},
series = {{International Journal of Refrigeration}},
title = {{Liquid side heat transfer and pressure drop in finned-tube cooling-coils operated with secondary refrigerants}},
url = {{http://dx.doi.org/10.1016/j.ijrefrig.2007.02.007}},
doi = {{10.1016/j.ijrefrig.2007.02.007}},
volume = {{30}},
year = {{2007}},
}