In this study, the thermal characteristics of turbulent nanofluid flow in a helical tube in the tube heat exchanger (HTTHE) were assessed numerically through computational fluid dynamics (CFD) simulation. The findings of both the turbulent models: realizable k-epsion (k-ε) and re-normalisation group (RNG) k-epsilon were compared. The temperature distribution contours show that realizable and RN...

A passive residual heat removal exchanger (PRHR HX) was used as the research object, and an experimental device with conduction oil source set up to complete study of outside tube saturation boiling. The improved Wilson diagram method calculate data, transfer law boiling smooth finned obtained. Compared two types tubes, intensification rate 1.07, that 2.39, 2.23 times tube. According rate, Nu m...

In this study, a reputable Kalina cycle system, KCS 11, is simulated and analysed. Within this efficient cycle, there are three heat exchangers: the first heat exchanger is designated for heat absorption from the heat source, the second heat exchanger is designed for heat release to the cold source, and the third heat exchanger is designed for energy recovery. In order to achieve precise si...

Alat penukar panas merupakan suatu peralatan yang digunakan untuk mempertukarkan energi dalam bentuk antara aliran fluida berbeda suhu dapat terjadi melalui kontak langsung maupun tidak langsung. Salah satu tipe dari alat kalor banyak dipakai adalah Shell and Tube Heat Exchanger. Namun perawatannya kita perlu adanya evaluasi lapangan sebelum dilakukan maintenace. Metode data selama 5(lima) hari...

The work analyzes the influence of number passes in a shell and tubes condenser heat exchanger, with an inlet pressure R134a refrigerant equal to 1.2 MPa. fluid that circulates is water or water-based nanofluid fraction aluminum oxide nanoparticles (Al2O3), methodology used subdivides exchanger into three distinct regions: overheated region, saturated subcooled region. main parameters analyze t...

the purpos of this paper is to aim the maximum heat transfer rate in a plate-fin heat exchanger with a constant volume and a contant surface area at a prescribed pressure drop. this paper propose a method for design a plat-fin heat exchanger in which a maximum pressure drop occurs at a constant volume and surface are. in this paper as a case study, a preheater of a gas turbine which is a plate-...

The ongoing global effort to replace current refrigerants with zero Ozone Depletion Potential (ODP) and virtually zero Global Warming Potential (GWP) refrigerants has important implications for heat exchangers, air conditioning system design, and the materials choices in these designs. Natural refrigerants with higher flammability, CO2, HFOs, and HFC – HFO blends each place different requiremen...

This study presents an innovative and simple way to increase the rate of heat transfer in a spiral plate heat exchanger model. Several circular cross-section rods, as continuous vortex generators, have been inserted within the spiral plate heat exchanger in the cross-stream plane. The vortex generators are located at various azimuth angles of α=30◦, 60◦, 90◦, and 120◦ with non-dimensional diame...