Experimental work for the performance of a printed circuit heat exchanger (PCHE) using nitrogen under trans-critical states
Experiments were carried out for the manufactured a printed circuit heat exchanger (PCHE) using nitrogen on the super-critical state. For the core of the PCHE, ‘N’ and reverse N, ‘RN’ shape microchannels were etched on stainless steel 316L plates, and total 120 plates were diffusion bonded. Then, fo...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-11-01
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| Series: | Energy Reports |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352484722018352 |
| _version_ | 1828010993383374848 |
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| author | Jeong-Heon Shin Kong Hoon Lee Seok Ho Yoon |
| author_facet | Jeong-Heon Shin Kong Hoon Lee Seok Ho Yoon |
| author_sort | Jeong-Heon Shin |
| collection | DOAJ |
| description | Experiments were carried out for the manufactured a printed circuit heat exchanger (PCHE) using nitrogen on the super-critical state. For the core of the PCHE, ‘N’ and reverse N, ‘RN’ shape microchannels were etched on stainless steel 316L plates, and total 120 plates were diffusion bonded. Then, for the PCHE evaluation in which the headers were welded, liquid nitrogen of below -170 °C and about 0.8 MPa was pressurized to about 3.42 ∼4.59 MPa, then was injected to the inlet on the cold side, and nitrogen gas of 72.7 ∼75.1 °C and about 0.6 ∼0.75 MPa was flowed through channels on the hot side. The flow rates were 2401 ∼3211 kg/h and 1592 ∼2357 kg/h on the hot and cold sides, respectively. In particular, the nitrogen on the cold side was pressurized by a pump, and state changes occurred over pseudo critical point. In order to evaluate performance of the PCHE with the super critical state nitrogen, the channels were simplified and discretized, then, effectiveness-number of transfer units (e-NTU) method was applied. Then, a new correlation expecting the thermal-hydraulic performance of PCHE was developed as Nu = 0.023Re0.78Pr0.4. |
| first_indexed | 2024-04-10T09:08:28Z |
| format | Article |
| id | doaj.art-1a63753b1d3c4461b945125fa522a7ef |
| institution | Directory Open Access Journal |
| issn | 2352-4847 |
| language | English |
| last_indexed | 2024-04-10T09:08:28Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Reports |
| spelling | doaj.art-1a63753b1d3c4461b945125fa522a7ef2023-02-21T05:13:44ZengElsevierEnergy Reports2352-48472022-11-0181276512775Experimental work for the performance of a printed circuit heat exchanger (PCHE) using nitrogen under trans-critical statesJeong-Heon Shin0Kong Hoon Lee1Seok Ho Yoon2Department of Mechanical & System Design Engineering, Hongik University, 94 Wausan-ro, Mapo-gu, Seoul, 04066, Republic of Korea; Corresponding authors.Department of Thermal Energy Solutions, Korea Institute of Machinery and Materials (KIMM), 156, Gajeongbuk-ro, Daejeon, 341103, Republic of KoreaDepartment of Thermal Energy Solutions, Korea Institute of Machinery and Materials (KIMM), 156, Gajeongbuk-ro, Daejeon, 341103, Republic of Korea; Corresponding authors.Experiments were carried out for the manufactured a printed circuit heat exchanger (PCHE) using nitrogen on the super-critical state. For the core of the PCHE, ‘N’ and reverse N, ‘RN’ shape microchannels were etched on stainless steel 316L plates, and total 120 plates were diffusion bonded. Then, for the PCHE evaluation in which the headers were welded, liquid nitrogen of below -170 °C and about 0.8 MPa was pressurized to about 3.42 ∼4.59 MPa, then was injected to the inlet on the cold side, and nitrogen gas of 72.7 ∼75.1 °C and about 0.6 ∼0.75 MPa was flowed through channels on the hot side. The flow rates were 2401 ∼3211 kg/h and 1592 ∼2357 kg/h on the hot and cold sides, respectively. In particular, the nitrogen on the cold side was pressurized by a pump, and state changes occurred over pseudo critical point. In order to evaluate performance of the PCHE with the super critical state nitrogen, the channels were simplified and discretized, then, effectiveness-number of transfer units (e-NTU) method was applied. Then, a new correlation expecting the thermal-hydraulic performance of PCHE was developed as Nu = 0.023Re0.78Pr0.4.http://www.sciencedirect.com/science/article/pii/S2352484722018352Printed circuit heat exchangerSuper-criticalHeat transferNitrogen |
| spellingShingle | Jeong-Heon Shin Kong Hoon Lee Seok Ho Yoon Experimental work for the performance of a printed circuit heat exchanger (PCHE) using nitrogen under trans-critical states Energy Reports Printed circuit heat exchanger Super-critical Heat transfer Nitrogen |
| title | Experimental work for the performance of a printed circuit heat exchanger (PCHE) using nitrogen under trans-critical states |
| title_full | Experimental work for the performance of a printed circuit heat exchanger (PCHE) using nitrogen under trans-critical states |
| title_fullStr | Experimental work for the performance of a printed circuit heat exchanger (PCHE) using nitrogen under trans-critical states |
| title_full_unstemmed | Experimental work for the performance of a printed circuit heat exchanger (PCHE) using nitrogen under trans-critical states |
| title_short | Experimental work for the performance of a printed circuit heat exchanger (PCHE) using nitrogen under trans-critical states |
| title_sort | experimental work for the performance of a printed circuit heat exchanger pche using nitrogen under trans critical states |
| topic | Printed circuit heat exchanger Super-critical Heat transfer Nitrogen |
| url | http://www.sciencedirect.com/science/article/pii/S2352484722018352 |
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