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BARTULI, E. BORKOVEC, O.
Original Title
THERMAL PROPERTIES OF CARDIOPLEGIA HEAT EXCHANGERS
Type
conference paper
Language
English
Original Abstract
Cardiac surgeries that involve cardiopulmonary bypass technique require a stable temperature maintenance for oxygenated blood or the cardioplegia solution. For this purpose, the heat exchangers are used. Nowadays, these exchangers consist of stainless steel tubes or bellows in a plastic shell. The blood is then warmed or cooled by water flowing in the shell around these structures. In the paper, the thermal specifications of two commercially used cardioplegia heat exchangers Capiox Cardioplegia and MYOtherm XP were evaluated and compared. For this purpose, a water was used as a substitution for blood. Both components were tested for varying flow rates in the pipes in the range 20-150 l/h and fixed flow rate 700 l/h in the shell. The thermal performances of both devices resulted similarly (up to 2.4 kW) at maximal flow rate. The performance factors for low flow rates approached values close to 0.98 and with increasing flow rate decreased down to 0.50. MYOtherm XP shows lower pressure drop than Capiox Cardioplegia due to more optimal construction. The major difference between the heat exchangers was observed in overall heat transfer coefficients at maximal flow rate and resulted in 2191.3 W/m(2)K or 1760.2 W/m(2)K for MYOtherm XP or Capiox Cardioplegia, respectively.
Keywords
Cardioplegia heat exchanger; Thermal performance; Performance factor; Heat transfer coefficient; Pressure drop
Authors
BARTULI, E.; BORKOVEC, O.
Released
25. 11. 2020
Publisher
BRNO UNIV TECHNOL, FAC MECHANICAL ENGINEERING
Location
BRNO
ISBN
978-80-214-5896-3
Book
ENGINEERING MECHANICS 2020 (IM2020)
1805-8248
Periodical
Engineering Mechanics ....
Year of study
26
Number
2020
State
Czech Republic
Pages from
82
Pages to
85
Pages count
4
URL
https://www.engmech.cz/im/proceedings/show_p/2020/82
BibTex
@inproceedings{BUT177301, author="Erik {Bartuli} and Ondřej {Borkovec}", title="THERMAL PROPERTIES OF CARDIOPLEGIA HEAT EXCHANGERS", booktitle="ENGINEERING MECHANICS 2020 (IM2020)", year="2020", journal="Engineering Mechanics ....", volume="26", number="2020", pages="82--85", publisher="BRNO UNIV TECHNOL, FAC MECHANICAL ENGINEERING", address="BRNO", doi="10.21495/5896-3-082", isbn="978-80-214-5896-3", issn="1805-8248", url="https://www.engmech.cz/im/proceedings/show_p/2020/82" }