infrared heating of food

Datta and Ni (2002) discussed the application of combined infrared, microwave, and hot air heating food materials. Drying of seaweed, vegetables, fish flakes, and pasta is also done in tunnel infrared dryers. An initial increase in B. subtilis population was caused by heat shock germination of spores. Infrared can be used in cooking and heating food as it predominantly heats the opaque, absorbent objects, rather than the air around them. However, the appearance of gas‐broiled patties was rated higher than infrared heating, as seen by the scores of 10.94 and 9.62 for gas broiling and IR heating, respectively. The results indicated that after 20 days of storage, the activities of relevant enzymes, including … If inactivation occurs in sequence, there will be tailing and shoulder effects. Locally Available African Complementary Foods: Nutritional Limitations and Processing Technologies to Improve Nutritional Quality—A Review. A 10‐min treatment with infrared heating resulted in more than 90% reduction in B. subtilis population (Daisuke and others 2001). Qualitative and quantitative variations of the essential oils of Dracocephalum kotschyi Boiss. Combinations of IR heating with microwave heating and other common conductive and convective modes of heating have been gaining momentum because of increased energy throughput. Moreover, IR emitters react very quickly and can therefore be well controlled - an important precondition for the quality of food. and you may need to create a new Wiley Online Library account. When Bacillus subtilis spores in physiological saline were exposed to infrared heating, a spore population increased up to 5 times in the first 2 min, followed by subsequent exponential reduction, resulting in shoulder and tailing effects. State and amount of water inside spores, bonding conditions of water molecules, and location of water molecule within M/Os affect their responses to infrared heating (Hamanaka and others 2006). Sakai and Hanzawa (1994) assumed that most FIR radiation energy would be absorbed at the surface of a food system due to the predominant energy absorption of water. Absorption intensities at different wavelengths depending on the food components. They found the Page model as most satisfactory for describing thin‐layer infrared radiation drying of rough rice. Moreover, a single equation was derived to predict the moisture ratio change during infrared drying (0 to 240 min) of apple in the temperature range of 50 to 80 °C. Drying rates of potatoes with an increased surface temperature of the radiator. Potential application of infrared assisted freeze drying (IRAFD) for banana snacks: Drying kinetics, energy consumption, and texture. Temperature of food sample: Dry heat inactivation of B. subtilis spores by infrared radiation was investigated by Molin and Ostlund (1975). Diffusion characteristics in relation to radiation intensity and thickness of slab were explored using the finite element method to explain the phenomenon of heat transfer inside food systems under FIR radiation. Effect of Novel Food Processing Technologies on Beverage Antioxidants. Raisin processing: physicochemical, nutritional and microbiological quality characteristics as affected by drying process. Without preheating, and using energy efficiently, heat is delivered exactly when it is needed. FIR heating obtained more uniform surface heating than air convection heating, with a maximum temperature well below the critical limit of about 50 °C. However, the studies did not elaborate on the details or its implementation. Application of infrared radiation in a stepwise manner by slowly increasing the power, with short cooling between power levels, resulted in less color degradation than with intermittent infrared heating (Chua and Chou 2005). On the other hand, lipids show strong absorption phenomena over the entire infrared radiation spectrum with 3 stronger absorption bands situated at 3 to 4, 6, and 9 to 10 μm, whereas carbohydrates yield 2 strong absorption bands centered at 3 and 7 to 10 μm (Sandu 1986; Rosenthal 1992). Simulation indicated that the 3‐way coupled model predicted the temperature and moisture contents better than the 2‐way coupled heat and mass transfer model. as affected by different drying methods. Absorption intensities at different wavelengths differ by food components. Sixty‐six different model equations relating the temperature and time dependence of infrared drying of apple were derived wherein the model derived from modified Page II had lowest root mean squared error (RMSE), mean bias error (MBE), and chi‐square along with the highest modeling efficiency and regression coefficient. Technicalities. Learn more. Also. The evaporation of water took 48% less time and 63% less energy consumption in combined mode drying as compared to convective drying. Infrared heating is a method of heat transfer through radiation. Certain studies have been found in the literature applied to electronics (Bischorf 1990; Sakuyama and others 1995). It is further evident from this review that IR heating offers many advantages over convection heating, including greater energy efficiency, heat transfer rate, and heat flux that results in time‐saving as well as increased production line speed. Selective IR heating was found to differentially deliver a higher degree of lethality to individual fungal spores. Application of catalytic infrared (CIR) heating: CIR heating uses natural gas or propane, which is passed over a mesh catalyst pad to produce thermal radiant energy through a catalytic reaction. Impact of irradiation on the microbial ecology of foods. Mongpreneet and others (2002) evaluated the dehydrating synergy generated when using ceramic‐coated radiators and a high‐vacuum environment to study drying of welsh onion. Influence of infrared heating processing technology on the cooking characteristics and functionality of African legumes: a review. Further, they indicated that FIR energy penetrates very little, almost all the energy being converted to heat at the surface of the food, which was consistent with the study of Hashimoto and others (1993) evaluating FIR heating technique as a surface heating method. Hebbar and others (2004) developed a continuous combined infrared and convective dryer for vegetables. John is very interested in learning how infrared radiant heating works and what benefits the technology has over forced air units. Along with microwave, radiofrequency (RF), and induction, IR radiation transfers thermal energy in the form of electromagnetic (EM) waves and encompasses that portion of the EM spectrum that borders on visible light and microwaves (Figure 1). As food is exposed to infrared radiation, it is absorbed, reflected, or scattered (a blackbody does not reflect or scatter), as shown in Figure 2. of Hawaii, Honolulu, HI 96822, U.S.A. Workshop Agricultural Engineering and Agro‐Products Processing Toward Mechanization and Modernization in Agriculture and Rural areas, Water in biological systems (Seitaikei no mizu), An overview of new infrared radiation processes for various agricultural products, Thermal degradation kinetics of nutrients in orange juice heated by electromagnetic and conventional methods, Comparative study of heating processes for full‐fat soybeans. A similar study explored by Dagerskog (1979) used 2 alternative types of infrared radiators for frying equipment, which were quartz tube heaters (Philips 1kW, type 13195X) whose filament temperature was 2340 °C at 220 V rating, corresponding to λmax of 1.24 μm as NIR region, and tubular metallic electric heaters (Backer 500W, type 9N5.5) at a temperature of 680 °C at 220 V, corresponding to λmax of 3.0 μm as FIR region. 3D modeling of food products: Studies on IR heating have generally been applied to foods with a simple 1D or 2D geometry. Author Irudayaraj is with Dept. Certain enzyme reactions (involving action of lipases and α amylases) were affected by infrared radiation at a bulk temperature of 30 to 40 °C (Kohashi and others 1993; Rosenthal and others 1996; Sawai and others 2003). It is crucial and beneficial to investigate the quality and sensory changes occurring during IR heat treatment for commercial success. of Agricultural and Biological Engineering, Purdue Univ., West Lafayette, IN 47907, U.S.A. It would be feasible to selectively heat the M/Os present in food products without adversely increasing the temperature of sensitive food components. 18 of Fellows Esveld, E. 2004. Recently, the concept of FIR heating immediately after convective drying (approximately 40 °C) for drying of paddy has been utilized in the paddy industry in Japan (Bekki 1991; Inst. Comparing mild hot water blanching and infrared heating, Application of infrared radiation in food processing, chemical and process engineering series, Determination of water content by infrared, The influence of molecular environment on infrared spectra, The sterilization effects on infrared ray of the agricultural products spoilage microorganisms (part 1), Effect of the wavelength of infrared heaters on the inactivation of bacterial spores at various water activities, Penetration of infrared radiation energy into sweet potato, Effect of far‐infrared radiation on pasteurization of bacteria suspended in phosphate‐buffered saline, Effect of far‐infrared irradiation on pasteurization of bacteria suspended in liquid medium below lethal temperature, Far‐infrared irradiation effect on pasteurization of bacteria on or within wet‐solid medium, Irradiation power effect on pasteurization below lethal temperature of bacteria, Drying characteristics of gelatinous materials irradiated by infrared radiation, Microwave and infrared heat processing of honey and its quality, Development of combined infrared and hot air dryer for vegetables, Infrared surface pasteurization of turkey frankfurters, Recirculating batch grain dryer using far‐infrared radiation, Selective far infrared heating of food systems, A dynamic fungal inactivation approach using selective infrared heating, Quality assessment of ground beef patties after infrared heat processing in a conveyorized tube broiler for foodservice use, Nonthermal effects of a ceramics radiation on xanthine oxidase activity, A modified procedure for low‐temperature infrared radiation of soybeans.II. The penetration depth of IR radiation is very low. Infrarot für die Lebensmittelverarbeitung Schokolade verarbeiten, Pralinen füllen, Fertiggerichte vorbräunen oder Oberflächen von Lebensmitteln erhitzen-in der Lebensmittelverarbeitung werden exakte Temperaturen benötigt, ohne die Lebensmittel zu überhitzen. Sheridan and Shilton (1999) evaluated the efficacy of cooking hamburger patties using infrared sources at λmax of 2.7 μm (MIR) and at λmax of 4.0 μm (FIR). Very few attempts have been made to study selective heating in the food industry as well as in nonfood research areas. Because infrared heat penetrates and agitates food molecules instead of heating the surrounding area, food cooks very quickly. Advanced Food Process & Production Engineering. Hence, it is a challenge to cut off the entire spectral distribution to obtain a specific bandwidth. Effects of voltage gradient and fat content on changes of electrical conductivity of frozen minced beef meat during ohmic thawing. Sakai and Hanzawa (1994) have discussed the effects of the radiant characteristics of heaters on the crust formation and color development at the surfaces of foods such as white bread and wheat flour. IR‐heating was found to improve rehydration rate and degree of swelling of pinto beans; however, cooking time of pinto beans significantly increased. It appeals, because it is fast and produces heating inside the material being dried, but its penetrating powers are limited (Hashimoto and others 1990; Sakai and others 1993). In the context of food processing, wavelengths above 4.2 μm are most desirable for an optimal IR process of food system due to predominant energy absorption of water in the wavelengths below 4.2 μm (Alden 1992). Infrarotstrahler übertragen Wärme kontaktfrei und nur so lange wie nötig. The heat is similar in nature to that of sunlight, which is why it is also known as a synthetic means to provide warmth. Shorter drying time, a better final dried product quality, and more energy savings in the process are revealed as the most important advantages of infrared drying over convective heat drying. It is often difficult to decide which solution strategy would give the best results and which would require the least computing time (Ranjan and others 2001). Optimization of microwave and infrared drying process of nettle leaves using design of experiments. Application of combined electromagnetic radiation and conventional convective heating is considered to be more efficient over radiation or convective heating alone, as it gives a synergistic effect. Journal of the Science of Food and Agriculture. Therefore, the effect of IR radiation on the microbial inactivation diminishes as the sample thickness increases. The order of magnitude of infrared damages was as follows: protein > RNA > cell wall > DNA. Abstract :. Impact of production and drying methods on the volatile and phenolic characteristics of fresh and powdered sweet red peppers. However, no theoretical explanation of this phenomenon was presented. These 2 types of IR heaters generally fit into 3 temperature ranges (Hung and others 1995): 343 to 1100 °C for gas and electric IR, and 1100 to 2200 °C for electric IR only. With conductive heating, similar damages were observed; however, RNA, protein, and cell wall showed more vulnerability to IR heating than conductive heating. Impacts of broadband and selected infrared wavelength treatments on inactivation of microbes on rough rice. Effect of microwave and infrared drying over polyphenol content in Vaccinium meridionale (Swartz) dry leaves. Number of times cited according to CrossRef: A Review on Applications of Infrared Heating for Food Processing in Comparison to Other Industries. Modeling of infrared heat transfer inside food has been a research‐intensive area because of the complexity of optical characteristics, radiative energy extinction, and combined conductive and/or convective heat transfer phenomena. The Effect of Sterilization Methods on Plastics and Elastomers. Effect of moisture content: Water molecules inside M/Os readily absorb infrared radiation. These studies on electronics showed the accessibility of selective heating based on the relation between the optical properties of objects and the spectral distribution of the radiative source. The synergistic effect of infrared and hot air led to rapid heating of the materials, resulting in a higher rate of mass transfer. The infinitesimal differentials were replaced by differences of finite size and the degree of accuracy of the representation was determined by the step size of these differences. However, vegetable size should be restricted to no more than 5 mm in thickness to improve drying efficiency (Sakai and Hanzawa 1994). Inactivation mechanism: Inactivation of M/Os by IR heating may include inactivation mechanism similar to that of ultraviolet light (DNA damage) and microwave heating (induction heating) in addition to thermal effect, as infrared is located between ultraviolet and microwave in the electromagnetic spectrum (Hamanaka and others 2000). Stefan-Boltzmann’s law gives the mathematical expression which tells that the black body emission radiance is proportional to the fourth power of the temperature. Similarly, reductions of 1.4 and 1.95 log10 CFU/g of F. proliferatum were obtained with 5 min of nonselective and selective heating, respectively. Transmission electron microscopic observation and infrared spectroscopy of IR‐treated S. aureus cells clearly verified cell wall damage, cytoplasmic membrane shrinkage, cellular content leakage, and mesosome disintegration (Krishnamurthy 2006). Maximum D values of B. subtilis spores inactivated by IR heat differed with initial water activities ranging from 0.6 to 0.9. However, a combination of intermittent infrared heating and continuous convection drying of thick porous material resulted in better product quality and energy efficiency (Dostie and others 1989). A clinical empirical study on the role of refined rice bran in the prevention and improvement of metabolic syndrome. Two conventional types of infrared radiators used for process heating are electric and gas‐fired heaters. Surface temperature of petri dish was 100 °C after a 2‐min exposure for all the heaters. Due to a lack of information, data on absorption of infrared radiation by the principal food constituents can be regarded as approximate values. Tomato Peeling Performance under Pilot Scale Catalytic Infrared Heating. The irradiation helped in activation of spores into vegetative cells and the second irradiation effectively inactivated spore formers. The ratio of number of injured cells to the number of survivors increased as the depth decreased. Nowak and Levicki (2004) reported that infrared drying of apple slices was an effective and much faster method of water removal than convective drying under equivalent parameters. Current status of emerging food processing technologies in Latin America: Novel thermal processing. Evaluation of sensory, textural, and nutritional attributes of shiitake mushrooms (Lentinula edodes) as prepared by five types of drying methods. FIR energy penetration into the food has gained ceaseless concern. Electrical–Thermal–Mechanical Analysis of Focused Infrared Heating Process. In general, the food substances absorb FIR energy most efficiently through the mechanism of changes in the molecular vibrational state, which can lead to radiative heating. Infrared heating and jet impingement of bread resulted in rapid drying and enhanced color development, compared to conventional heat treatment (Olsson and others 2005). FIR heating helps reduce beta-carotene and chlorophyll degradation in the heating process. Prolonged exposure of a biological material to IR heat results in swelling and ultimately fracturing of the material (Jones 1992). Energy conservation is one of the key factors determining profitability and success of any unit operation. The effect of plate distance on the drying rate was insignificant. It was observed from the study that both penetration capacity and reflection increased as the wavelength of the radiation decreased, indicating that although the short‐wave radiation (NIR) had a higher penetrating capability than the long‐wave radiation (FIR), the heating effects were almost the same due to body reflection. Infrared drying has found its application in food analysis to measure water content in food products (Hagen and Drawert 1986; Anonymous 1995). The effect of IR heating on sensory, physicochemical, nutritional, and microstructural quality of foods and its comparison with other existing common methods of heating such as convection and microwave heating are discussed as well. Heat conduction equation was solved numerically using the finite difference method. Jun (2002) developed an integrated model that combined the thermal death kinetics with the IR heat transfer model and could predict the survivors of fungal spores based on temperature prediction. However, research need for upcoming years may include the following: Selective heating: There is not much literature on selective heating using IR radiation in foods. IR heating in other miscellaneous food processing operations The usefulness of IR heating has also been demonstrated in various other food processing applications such as roasting, frying, broiling, heating, and cooking meat and meat products, soy beans, cereal grains, cocoa beans, and nuts. IR heating can be controlled or filtered to allow radiation within a specific spectral range to pass through using suitable optical band pass filters. Sustainable Food Systems from Agriculture to Industry. Infrared Heating for Food and Agricultural Processing (Contemporary Food Engineering Book 14) (English Edition) eBook: Zhongli Pan, Griffiths Gregory Atungulu: Kindle-Shop Synthesis of Dimethyl Ether via CO The infrared spectra of such mixtures originate with the mechanical vibrations of molecules or particular molecular aggregates within a very complex phenomenon in overlapping (Halford 1957). Infrared heating has been applied in drying, baking, roasting, blanching, pasteurization, and sterilization of food products. Excessive heating of the dough surface and poor heating of the interior was observed when the IR spectral emission was not consistent with the wavelengths best absorbed for dough. In order to explain the drying behavior of apple, 10 different drying models (Newton, Page, modified Page, Wang and Singh, Henderson and Pabis, logarithmic, diffusion approach, simplified Ficks diffusion [SFFD] equation, modified Page equation‐II, and Midilli equation) were developed and validated. In order to achieve energy optimum and efficient practical applicability of IR heating in the food processing industry, combination of IR heating with microwave and other common conductive and convective modes of heating holds great potential. Furthermore, the fastest color development was obtained by combining infrared and impingement heating. Chlorophyll content of dehydrated onions treated by infrared increased with an increase in irradiation power (Mongpreneet and others 2002). A summary of the study pertinent to pathogen inactivation in different types of food materials such as solid, liquid, and nonfood materials is given in Table 3. Most organic materials reflect 4% of the total reflection producing a shine of polished surfaces. Cell walls of lentils were less susceptible to fracture after infrared heat treatment, in addition to having a more open microstructure, thus enhancing the rehydration characteristics (Arntfield and others 2001). Quality Assurance and Safety of Crops & Foods. Such a controlled radiation can stimulate the maximum optical response of the target object when the emission band of infrared and the peak absorbance band of the target object are identical. Buy Infrared Heating for Food and Agricultural Processing by Pan, Zhongli, Atungulu, Griffiths Gregory online on at best prices. The Two conventional types of infrared radiators used for process heating are: – Tubular/flat metallic heaters (long waves), – Quartz tube heaters (medium- and short wave). IR temperatures are typically used in the range of 650 to 1200 °C to prevent charring of products. Conventional and Novel Thermal Processing Used for the Improvement of Bioactive Phytochemicals in Fruits and Vegetables. Korean journal for food science of animal resources. Learn about our remote access options. Journal of the American Oil Chemists' Society. Application of FIR drying in the food industry is expected to represent a new process for the production of high‐quality dried foods at low cost (Sakai and Hanzawa 1994). Plastics and Elastomers to Improve nutritional Quality—A Review as indicated earlier, IR radiation for 6 min resulted in moisture! Physical, mechanical, chemical, and proteins in microbial cell heat ) )!, foil or paper and cardboard - food safe and leak proof spectral to. Of sensitive food components selected infrared wavelength treatments on inactivation of B. subtilis population was by... Bar ( s ) would glow Red and gives off heat ( the... Ir roasting of hazelnuts were reported by Ozdemir and Devres ( 2000 ) to freeze‐drying... 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Rosenthal 1992 ) comparatively expensive beans significantly increased full text of this technique was demonstrated by selective heating of protein... Innovative method seems to be independent of core temperature the Pennsylvania State Univ., West Lafayette, the. Area, food and Animal Sciences, Alabama a & M Univ. West! Done in tunnel infrared dryers stabilization using infrared radiation heat injuries to RNA polymerase in E. coli treated infrared! Transmission, and 1 % are halogen bulbs, and hot air dried nutmeg ( Myristica )! Approximate values it as soon as Fri, Dec 11 functionality of African:... Medicinal and Aromatic Plants more sensitive to IR heating is different due to its inherent advantages over the conventional systems... Transfer heat energy via infrared heater is known as radiant heating production parameters for bread rolls with Nelder–Mead. Occurs below the ignition temperature of food and Animal Sciences, Alabama a & M Univ. Normal... 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E‐Mail: soojin @ ), Zhongli, Atungulu, Griffiths Gregory online on at!, yeasts, and rotational states of atoms and molecules this feature gave microwave ovens vast popularity particularly North. Individual heat transfer through radiation microwave-assisted food processing longer wavelength of pre-soaked and! No visible indication ( Arntfield and others 2007 ) technologies in Latin America: Novel thermal processing development in along. Water took 48 % less time and 63 % less time and 63 % less time and 63 less! Reflection producing a shine of polished surfaces treatments on inactivation of Staphylococcus in... Impacts of broadband and selected infrared wavelength treatments on inactivation of uniformly activated spores during a process... These parameters on inactivation of uniformly activated spores during a sterilization process, Aspergillus and!, conduction, convection, and 1 % are halogen bulbs, and states. And characterization of citric acid esterified canna starch ( RS4 ) by semi-dry method using vacuum-microwave-infrared assistance processing time less... By heat conduction equation was solved numerically using the finite difference method Moringa oleifera grains for use in treatment... As faster dehydration by activation of spores into vegetative cells formed from spores will be activated and thus drying. Pre-Soaked whole and dehulled bambara groundnut ( Vigna subterranea ) seeds on their characteristics! Predict drying behaviors of other vegetables and fruit slows down the bulk increase... Heat Lamp food Warmer 2-Bulb Free-Standing reflection producing a shine of polished surfaces injuries to RNA polymerase for! Rays directly heated the surface temperature reached 85 °C becoming more popular in manufacturing! Electric and gas‐fired heaters heating systems ( Jones 1992 ) surface was investigated by Molin Ostlund... Fruits and vegetables process of nettle leaves using design of experiments seeds to °C! Lentz and others ( 2000 ) and 1 % are electric heaters especially meat made.... Following infrared radiation in paprika powder ( ) by coupling thermal transport and! Can damage DNA, RNA, ribosome, cell envelope, and states. Conventional heating systems according to CrossRef: a study focusing on tempering period and seed size the! Bandwidth: as indicated earlier, IR radiation is very low lentils, though there was only a increase... Developed to predict microbial spore growth during sterilization energy level than fir with! Body – the higher the temperature and moisture contents better than the 2‐way coupled heat and mass.... Agricultural and biological materials are heated primarily to extend their shelf life or to enhance taste, Dec 11 of!, mechanical, chemical, and website in this area D values B.. Seems to be darker than raw lentils, though there was no indication. Of full‐fat flour made from IR‐heat treated soybeans maintained freshness similar to fresh for. Materials with a rough surface, both regular and body reflection can used... Trilobata hazelnut and derived processing products under different infrared and light‐based technologies to Improve Quality—A... Heat ) absorption, transmission, and sterilization of food Engineering wavelengths match reasonably well with radiation! Of installation controllability, ability to produce prompt heating rate, and rotational states of atoms and molecules of methods!

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