Wyniki wyszukiwania - BazTech

1

Heat transfer and pressure drop characteristics of the silicone-based plate heat exchanger

Muszyński Tomasz, Andrzejczyk Rafał, Park Il Wong, Dorao Carlos Alberto

Archives of Thermodynamics

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2019

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Vol. 40, no 1

127--143

EN

The paper presents an experimental investigation of a silicone based heat exchanger, with passive heat transfer intensification by means of surface enhancement. The main objective of this paper was to experimentally investigate the performance of a heat exchanger module with the enhanced surface. Heat transfer in the test section has been examined and described with precise measurements of thermal and flow conditions. Reported tests were conducted under steady-state conditions for single-phase liquid cooling. Proposed surface modification increases heat flux by over 60%. Gathered data presented, along with analytical solutions and numerical simulation allow the rational design of heat transfer devices.

2

Recuperator with microjet technology as a proposal for heat recovery from low-temperature sources

Wajs J., Mikielewicz D., Fornalik-Wajs E., Bajor M.

Archives of Thermodynamics

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2015

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Vol. 36, no. 4

49--64

EN

A tendency to increase the importance of so-called dispersed generation, based on the local energy sources and the working systems utilizing both the fossil fuels and the renewable energy resources is observed nowadays. Generation of electricity on industrial or domestic scale together with production of heat can be obtained for example through employment of the ORC systems. It is mentioned in the EU directive 2012/27/EU for cogenerative production of heat and electricity. For such systems the crucial points are connected with the heat exchangers, which should be small in size but be able to transfer high heat fluxes. In presented paper the prototype microjet heat exchanger dedicated for heat recovery systems is introduced. Its novel construction is described together with the systematical experimental analysis of heat transfer and flow characteristics. Reported results showed high values of the overall heat transfer coefficient and slight increase in the pressure drop. The results of microjet heat exchanger were compared with the results of commercially available compact plate heat exchanger.

3

Badanie minikanałowego skraplacza w propanowej instalacji chłodniczej

Łukaszuk M., Butrymowicz D., Dudar A., Gagan J.

Instal

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2013

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nr 12

74--77

PL

W pracy zamieszczono opis stanowiska badawczego oraz metodyki badań cieplnych minikanałowego skraplacza chłodzonego powietrzem. Zaprezentowano wyniki badań współczynnika wnikania ciepła po stronie skraplającego się czynnika i powietrza chłodzącego z zastosowaniem pośredniej metody Wilsona. Badania przeprowadzono dla propanu jako czynnika roboczego.

EN

In this paper, the test stand and methodology of investigation of minichannel air-cooled condenser are presented. The experimental heat transfer coefficients on the both side of condensing refrigerant and cooling air calculated by the use of Wilson plot method are presented too. The investigation has been carried out for propane as a working fluid.