| 1. |
- Belov, Ilja, et al.
(författare)
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Fin‐Tube and Plate Heat Exchangers : Evaluation of Transient Performance
- 2017
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Ingår i: 18th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE). - : IEEE. - 9781509043446 - 9781509043439 - 9781509043453
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Konferensbidrag (refereegranskat)abstract
- A methodology for evaluation of transient performance of, and comparison between plate heat exchanger and plate-fin-and-tube heat exchanger was developed and realized, including experiment and 3-D simulation. Heat transfer from water to a gas medium was addressed. The heated gas volume was the same for both heat exchanger designs. This was achieved by placing the plate-fin-and-tube heat exchanger into enclosure. The volume average temperature of the gas as function of time was computed. Estimated material cost for the studied designs was at least seven times lower than for the stainless steel plate heat exchanger. The performance of the selected plate-fin-and-tube heat exchanger design was found comparable to the plate heat exchanger, when both fin and tube materials were set to Al, and the enclosure was a light-weight thermal insulator. Transient behavior of the studied heat exchangers should be of interest for micro-grid applications, but also for thermal management in electronic cabinets and data centers.
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| 2. |
- Rantala, Andreas, et al.
(författare)
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The Meaning of Boarding in a Swedish Accident & Emergency Department : A Qualitative Study on Patients' Experiences of Awaiting Admission
- 2021
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Ingår i: Healthcare. - : MDPI. - 2227-9032. ; 9:1, s. 1-13
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Tidskriftsartikel (refereegranskat)abstract
- The number of in-hospital beds in Sweden has decreased during recent decades, resulting in the smallest number (2.2 available beds/1000 inhabitants) within the European Union. At the same time, the number of patients attending Accident and Emergency (A&E) departments has increased, resulting in overcrowding and boarding. The aim of this study was to explore the meaning of being subjected to boarding at an A&E department, as experienced by patients. A phenomenological-hermeneutic approach was chosen to interpret and understand the meaning of boarding at A&E. The study was carried out at a hospital in the south of Sweden. Seventeen participants with a mean age of 64 years (range: 35-86 years) were interviewed. The thematic structural analysis covers seven themes: Being in a state of uncertainty, Feeling abandoned, Fearing death, Enduring, Adjusting to the circumstances, Being a visitor in an unsafe place, and Acknowledging the staff, all illustrating that the participants were in a state of constant uncertainty and felt abandoned with no guidance or support from the clinicians. The conclusion is that the situation where patients are forced to wait in A&E, i.e., boarding, violates all conditions for professional ethics, presumably causing profound ethical stress in the healthcare professionals involved. Thus, boarding should be avoided.
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