Thermal energy savings in pilot-scale plate heat exchanger system during product processing using modified surfaces

Balasubramanian, Sundaravadivel; Puri, Virendra M.

doi:10.1016/j.jfoodeng.2008.10.014

Cited by 22 publications

(7 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also, the absence of fluorine (F) and titanium (Ti) in the foulant deposits suggested that there was no peeling or migration of PTFE or TiO 2 into milk from the applied coating. Similar observation was reported for Lectrofluor‐641 coated PHE used for skim milk processing (Balasubramanian & Puri, 2009). As PTFE‐TiO 2 coating was annealed at 410°C, the adhesion strength of the coating to SS316 surface was very strong.…”

Section: Resultssupporting

confidence: 86%

“…It is evident that the PTFE‐TiO 2 layer reduced the adherence of foulants from the constituents of milk (particularly proteins). Balasubramanian and Puri (2009) observed 85–87% reduction in fouling with skim milk by Ni‐P‐PTFE coating on SS316 surface. Liu et al (2020) reported that Ni‐P‐PTFE nanocomposite coating on SS 304 plates showed a significant anti‐fouling performance due to reduction in friction for flow, thereby reducing the deposition of foulants by 20.4% and asymptotic fouling resistance by 28.2%.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, development of antifouling plates for PHE for milk pasteurization is an area of research focus worldwide (Dhotre, 2014; Liu, Chen, Li, Ding, & Xu, 2020). Balasubramanian and Puri (2009) proposed that food‐grade hydrophobic polymer‐based coatings including Ni‐P‐PTFE, Lectrofluor‐641 and AMC148‐18 could significantly reduce surface deposition and thermal energy consumption rates of PHE during pasteurization of milk. Boxler, Augustin, and Scholl (2013) evaluated the impact of SS surface modification using diamond like carbon (DLC) coating on fouling resistance and the amount, type and composition of deposit formed.…”

Section: Introductionmentioning

confidence: 99%

“…Plate heat exchangers (PHE) are popular in the food and dairy industry owing to their compact design, large surface area of plates and high heat transfer coefficient (Balasubramanian & Puri, 2009). The plates of PHE are preferably made of stainless steel (SS316) because of its superior mechanical properties and corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Mitigation of fouling during milk processing in polytetrafluoroethylene‐titanium dioxide coated plate heat exchanger

Munivenkatappa

Franklin

Dhotre

et al. 2021

J Food Process Engineering

View full text Add to dashboard Cite

An attempt was made to mitigate fouling during milk processing in plate heat exchanger by modifying SS316 surface with the coating of polytetrafluoroethylene (PTFE) and titanium dioxide (TiO 2 ) nanoparticles. The surface characteristics of PTFE-TiO 2 coated and conventional SS316 plates, and their thermal performance during heating of milk in batches for 8 hr were compared. It was observed that the static contact angles of water on SS316 and PTFE-TiO 2 coated plates were 66.8 ± 6.3 and 112.8 ± 0.8 , while for milk they were 61.0 ± 6.1 and 97.5 ± 1.1 , respectively. The increase in contact angle for coated surface was suggestive of weaker interaction between the fluid and surface, and enhancement in hydrophobicity. Overall heat transfer coefficients for uncoated and coated plates ranged from 354.36 to 952.26 Wm À2 K À1 and 477.11 to 593.73 Wm À2 K À1 , whereas the fouling factor was 1.723 Â 10 À3 and 0.412 Â 10 À3 m 2 KW À1 , respectively. As deposition of foulants occurred, the overall heat transfer coefficient of SS316 and coated surfaces dropped by 62.15 and 19.40%, respectively, from the initial value, resulting in crossover of the curves at 310 min of heating milk. After 480 min of heating milk, the fouling factor of SS316 plates was at least four times higher than that of PTFE-TiO 2 coated plates.The PTFE-TiO 2 coating mitigated the deposition of milk foulants by 20 times than that of SS316 surface. Practical ApplicationsFouling of plate heat exchangers (PHE) during milk processing is an unsolved problem causing significant loss in heat transfer performance, increased pressure drop in flow between plates, loss of process time due to cleaning and impairment of product quality. The high surface free energy and hydrophilic adhesion of SS316 to milk act as stimulants to fouling. Modification of SS316 plates in PHE with coating of polytetrafluroethylene and titanium dioxide nanoparticles mitigates fouling. Coated plates maintain the heat transfer performance of the plates for extended time and reduce the cleaning requirement. Also, savings in harsh chemicals, water, and pumping costs could be realized.

show abstract

Section: Resultssupporting

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mitigation of fouling during milk processing in polytetrafluoroethylene‐titanium dioxide coated plate heat exchanger

Munivenkatappa

Franklin

Dhotre

et al. 2021

J Food Process Engineering

View full text Add to dashboard Cite

show abstract

“…Silane and polymeric coatings offer the potential of high-throughput coating without specialized equipment but may suffer from delamination after extended exposure to thermomechanical and chemical stresses typical of food processing equipment (Forster and Bohnet 2000;Kananeh et al, 2010). Another well-studied nonfouling coating technology is the codeposition of polytetrafluoroethylene (PTFE) nanoparticles during electroless nickel and phosphorus plating to create nonfouling Ni-PTFE coatings on processing equipment (Lalande et al, 1989;Zettler et al, 2005;Dumitrascu and Borcia, 2006;Rosmaninho et al, 2007;Balasubramanian and Puri, 2009b;Barish and Goddard, 2013). Such Ni-PTFE coatings can be conformally applied to large, irregularly shaped solid supports (e.g., corrugated heat exchanger plates, spray drier nozzles) using commercially available coating facilities.…”

Section: Introductionmentioning

confidence: 99%

Stability of nonfouling electroless nickel-polytetrafluoroethylene coatings after exposure to commercial dairy equipment sanitizers

Huang

Goddard

2015

Journal of Dairy Science

View full text Add to dashboard Cite

Application of nonfouling coatings on thermal processing equipment can improve operational efficiency. However, to enable effective commercial translation, a need exists for more comprehensive studies on the stability of nonfouling coatings after exposure to different sanitizers. In the current study, the influence of different commercial dairy equipment sanitizers on the nonfouling properties of stainless steel modified with electroless Ni-polytetrafluoroethylene (PTFE) coatings was determined. Surface properties, such as dynamic contact angle, surface energy, surface morphology, and elemental composition, were measured before and after the coupons were exposed to the sanitizers for 168 cleaning cycles. The fouling behavior of Ni-PTFE-modified stainless steel coupons after exposure was also evaluated by processing raw milk on a self-fabricated benchtop-scale plate heat exchanger. The results indicated that peroxide sanitizer had only minor effect on the Ni-PTFE-modified stainless steel surface, whereas chlorine- and iodine-based sanitizers influenced the surface properties drastically. The coupons after 168 cycles of exposure to peroxide sanitizer accumulated the least amount of fouling material (4.44±0.24mg/cm(2)) compared with the coupons exposed to the other 3 sanitizers. These observations indicated that the Ni-PTFE nonfouling coating retained antifouling properties after 168 cycles of exposure to peroxide-based sanitizer, supporting their potential application as nonfouling coatings for stainless steel dairy processing equipment.

show abstract

Biofilms in Dairy Products and Dairy Processing Equipment and Control Strategies

Wang

Demirci

Puri

2015

Biofilms in the Food Environment

View full text Add to dashboard Cite

Thermal energy savings in pilot-scale plate heat exchanger system during product processing using modified surfaces

Cited by 22 publications

References 10 publications

Mitigation of fouling during milk processing in polytetrafluoroethylene‐titanium dioxide coated plate heat exchanger

Mitigation of fouling during milk processing in polytetrafluoroethylene‐titanium dioxide coated plate heat exchanger

Stability of nonfouling electroless nickel-polytetrafluoroethylene coatings after exposure to commercial dairy equipment sanitizers

Biofilms in Dairy Products and Dairy Processing Equipment and Control Strategies

Contact Info

Product

Resources

About