首页|Proposal, transient model, and experimental verification of loop heat pipe as heating device for electric-vehicle batteries
Proposal, transient model, and experimental verification of loop heat pipe as heating device for electric-vehicle batteries
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NSTL
Elsevier
This paper reports design， fabrication， and experimental results of a loop heat pipe (LHP) as a heating device for batteries of electric vehicles。 Usually， LHPs are used as a cooling device。 In this study， however， the LHP is used as a heating device by attaching battery blocks which are the heating target， to the condenser of the LHP。 A new transient analytical model was also constructed using the implicit method， which is a multidimensional extension of the Newton–Raphson method。 The analytical results are compared with the test results from the point of the transient behavior of the heating LHP。 A cylindrical type evaporator with an outer diameter of 27 mm and a length of 150 mm was used。 A flat perforated tube with a length of 1625 mm was used as the condenser。 R 134a was selected as the working fluid。 The condenser of the LHP is connected to the simulated battery blocks， which were made of 48 aluminum-alloy blocks (100 × 128 × 26。5 mm)。 First， the operation test was conducted at room temperature， and the basic thermal performance and the concept of the battery heating were evaluated。 Next， the experiment was conducted in a thermostatic bath which was set at ?20 °C。 The experimental results showed the simulated battery blocks reached above 0 °C at 14，600 s。 The temperature increase rate was estimated to be 0。06–0。09 °C/min， and it can be considered that this LHP can be used as a heating device under actual low-temperature conditions。
NSTL
Elsevier
