Use of high performance plate heat exchangers in chemical and process industries

Reppich, Marcus

doi:10.1016/s1290-0729(99)00109-x

Cited by 30 publications

(18 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…PHEÕs are extensively used in chemical, pharmaceutical, biochemical processing, food and dairy industries, to name but a few, due to the easy disassembly of the heat exchanger for cleaning and sterilization, low space requirement, low fouling tendency and high efficiency (Gut & Pinto, 2003a, 2003bKakaç & Liu, 2002;Reppich, 1999). Process fluid media generally have nonNewtonian characteristics and the shear thinning or thickening behaviour of these fluids greatly affects their thermal-hydraulic performance (Manglick & Ding, 1997).…”

Section: Introductionmentioning

confidence: 99%

Thermal behaviour of stirred yoghurt during cooling in plate heat exchangers

Fernandes

Dias

Nóbrega

et al. 2006

Journal of Food Engineering

View full text Add to dashboard Cite

In this study, CFD calculations were made in order to analyse the thermal behaviour of yoghurt in a plate heat exchanger, the yoghurt viscosity being described by a Herschel-Bulkley model.The influence of Reynolds number on local Nusselt numbers was analysed as well as the influence of entry effects on average Nusselt number. Numerical runs considering and discarding the influence of temperature on the viscosity were performed and the impact on average Nusselt numbers was analysed. Transversal variations of viscosity were studied and thermal correlations including the ratio between bulk and wall viscosities are proposed.The obtained thermal correlations were compared with the experimental ones (described in the literature) and a very good agreement was found, mainly when considering the effect of temperature on viscosity. Simulations with a non-Newtonian fluid having lower Prandtl numbers than yoghurt were performed in order to analyse the influence of this variation on the Reynolds number exponent of the thermal correlation.

show abstract

Section: Introductionmentioning

confidence: 99%

Thermal behaviour of stirred yoghurt during cooling in plate heat exchangers

Fernandes

Dias

Nóbrega

et al. 2006

Journal of Food Engineering

View full text Add to dashboard Cite

show abstract

“…(1)) are widely used in chemical, pharmaceutical, food, dairy, pulp and paper industries, as well as in air conditioning and refrigeration systems (HVAC&R) and offshore gas and oil applications [2][3][4][5][6][7][8][9][10], to name a few, due to the low space requirement, low fouling tendency (high shearing forces), high efficiency, easy disassembly of the heat exchanger for cleaning and sterilization and flexibility on account of modular design, i.e., the heat transfer area can be easily varied by removing or introducing plates and the plate pattern can also be easily changed [4].…”

Section: Gasketed Plate and Frame Heat Exchangersmentioning

confidence: 99%

“…In 1996 the total market for heat exchangers in Europe amounted to USD 3.6 billion and the plate heat exchanger had a market share of 13 % (second position after the conventional 3 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 shell-and-tube heat exchanger) [4]. Modern plate heat exchangers provide higher working temperatures, larger working pressures, higher resistance to chemicals, etc.. Due to this, different types of plate heat exchangers are nowadays applied in a very broad range of industrial heat exchanger needs [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

New Plates for Different Types of Plate Heat Exchangers

Fernandes¹,

Dias²,

Maia

2008

MENG

View full text Add to dashboard Cite

The first patent for a plate heat exchanger was granted in 1878 to Albretch Dracke, a German inventor. The commercial embodiment of these equipments has become available in 1923. However, the plate heat exchanger development race began in the 1930's and these gasketed plate and frame heat exchangers were mainly used as pasteurizers (e.g. for milk and beer). Industrial plate heat exchangers were introduced in the 1950's and initially they were converted dairy models. Brazed plate heat exchangers were developed in the late 1970's.However, copper brazed units did not start selling until the early 80's. Nickel brazing came to market around ten years later, since copper presents compatibility problems with some streams (e.g. ammonia). All-welded and semi-welded (laser weld) plate heat exchangers were developed during the 1980's and early 90's. Shell and plate heat exchangers were recently introduced in the market and can withstand relatively high pressures and temperatures, as the shell and tube does. The fusion bonded plate heat exchangers (100% stainless steel) are a technology from the 21 st century, these equipments being more durable than brazed plate heat exchangers. The plates are the most important elements from the different plate heat exchangers mentioned above. This paper initially introduces the gasketed plate and frame heat exchanger and common chevron-type plates. Resorting to computer fluid dynamics techniques, the complex 3D flow in cross-corrugated chevron-type plate heat exchanger passages is visualized. Recent patents related with the plates from different plate heat exchangers are then outlined.Keywords: Gasketed plate heat exchangers, brazed plate heat exchangers, all-welded plate heat exchangers, semi-welded plate heat exchangers, double-wall plate heat exchangers, shell and plate heat exchangers, fusion plate heat exchangers, computer fluid dynamics.2

show abstract

“…Although these devices where first devised for the dairy industry, they are becoming increasingly popular and now they are common in many chemical and process industries. Among other advantages, they are compact, easily manufactured, simple to maintain and clean, and have very high heat exchange coefficients, enhanced by the often turbulent flow [2]. They can have 50% less volume than a fined tube heat exchanger, and 60% less than a serpentine one for the same thermal performance.…”

Section: Introductionmentioning

confidence: 99%