Topic
Countercurrent exchange
About: Countercurrent exchange is a research topic. Over the lifetime, 2255 publications have been published within this topic receiving 28687 citations. The topic is also known as: Countercurrent exchange.
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TL;DR: In this article , the role of planar hydraulic jump in termination of stratified gas-liquid flow in a narrow rectangular conduit is investigated, where the Froude number of the incoming liquid Fr is greater than unity (supercritical flow).
2 citations
2 citations
Patent•
17 Jan 1992
TL;DR: In this article, the transfer medium is introduced into the channel in a region at least close to the region of the introduction of the products and moves with them in the same direction.
Abstract: The invention relates to a device for heat exchange with a view to heating a product to a predetermined temperature. It is in particular characterised in that, instead of being introduced so as to move in countercurrent (counterflow) to the direction (13) of movement of the products to be treated, the transfer medium (11) is introduced into the channel in a region at least close to the region of introduction of the products and moves with them in the same direction.
2 citations
TL;DR: In this paper, a three-dimensional model was developed to predict the flow of liquid and vapor that results from countercurrent flow of water injected into the hot leg of a PWR and the oncoming steam flowing from the upper plenum.
2 citations
TL;DR: In this article, a novel model of a liquid-liquid heat pipe heat exchanger in a countercurrent manner is established by considering the evaporation and condensation thermal resistances inside the heat pipes (HPs).
Abstract: Heat pipe heat exchangers (HPHEXs) are widely used in various industries. In this paper, a novel model of a liquid–liquid heat pipe heat exchanger in a countercurrent manner is established by considering the evaporation and condensation thermal resistances inside the heat pipes (HPs). The discrete method is added to the HPHEX model to determine the thermal resistances of the HPs and the temperature change trend of the heat transfer fluid in the HPHEX. The established model is verified by the HPHEX structure and experimental data in the existing literature and demonstrates numerical results that agree with the experimental data to within a 5% error. With the current model, the investigation compares the effectiveness and minimum vapor temperature of the HPHEX with three types of HP diameters, different mass flow rates, and different H* values. For HPs with a diameter of 36 mm, the effectiveness of each is improved by about 0.018 to 0.029 compared to HPs with a diameter of 28 mm. The results show that the current model can predict the temperature change trend of the HPHEX well; in addition, the effects of different structures on the effectiveness and minimum vapor temperature are obtained, which improve the performance of the HPHEX.
2 citations