Energy optimization of the Yankee-Hood dryer

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ÖNEL, Selis ;GÜRÜZ, Güniz .
Energy optimization of the Yankee-Hood dryer. 
Strojniški vestnik - Journal of Mechanical Engineering, [S.l.], v. 47, n.8, p. 512-518, july 2017. 
ISSN 0039-2480.
Available at: <https://www.sv-jme.eu/sl/article/energy-optimization-of-the-yankee-hood-dryer/>. Date accessed: 21 jan. 2020. 
doi:http://dx.doi.org/.
Önel, S., & Gürüz, G.
(2001).
Energy optimization of the Yankee-Hood dryer.
Strojniški vestnik - Journal of Mechanical Engineering, 47(8), 512-518.
doi:http://dx.doi.org/
@article{.,
	author = {Selis  Önel and Güniz  Gürüz},
	title = {Energy optimization of the Yankee-Hood dryer},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {47},
	number = {8},
	year = {2001},
	keywords = {dryers; heat transfer; energetic optimising; },
	abstract = {The Yankee-Hood dryer is the crucial section of the paper machine due to the consumption of energy. As a consequence of continuously increasing energy costs, determination of the proper operating conditions is essential to operate the tissue machine in the most efficient and economic means while ensuring paper quality. The objective of this study is to evaluate the Yankee-Hood dryer in 'lpekkagit' tissue paper factory, set the mass and energy balances and make optimization studies in order to achieve the desired production rate whilst keeping the drying parameters within limits at the minimum energy costs. The approach to solve the problem is to develop a steady state analytical model. The complicated drying system is simplified as the overall and sub systems. Material and energy balances are set up for each system. Data of machine parameters at several paper grades are collected at the factory during production. Material and energy balance equations are solved with the available data for the unknown parameters and for the determination of the drying parameters most effective on energy consumption. The critical drying parameters are air supply velocity, wet- and dry-hood temperatures, steam pressure in cylinder and exhaust humidity. Efficiency, defined as the ratio of energy required to evaporate the water to energy input through the system boundaries, is calculated as 28-30% for different grades of tissue paper production. Steady state rate of heat transfer to the wet sheet is analyzed considering the two-way mechanism, from steam through the cast iron shell and from heated air. The transfer of heat is eased in both mechanisms by the lightweight tissue paper that has a comparatively lower internal thermal resistance with respect to other types of paper products. Steam side is modeled considering different thermal resistances in series: Condensate layer, shell, shell-sheet contact, and paper sheet. These resistances are to the same order of magnitude, cast iron shell being the largest and paper sheet the smallest in value. Sheet- shell contact heat transfer coefficient is strongly dependent on sheet moisture content that is assumed to vary almost linearly due to the angular position on the Yankee. Air side heat transfer is mostly affected by the temperature, humidity and velocity the air that is blown on to the sheet. Calculations resulted out that rate of heat transfer from air side 55-65% while that from steam side is 35-45% of their total indicating the dominance of air side on drying.},
	issn = {0039-2480},	pages = {512-518},	doi = {},
	url = {https://www.sv-jme.eu/sl/article/energy-optimization-of-the-yankee-hood-dryer/}
}
Önel, S.,Gürüz, G.
2001 July 47. Energy optimization of the Yankee-Hood dryer. Strojniški vestnik - Journal of Mechanical Engineering. [Online] 47:8
%A Önel, Selis 
%A Gürüz, Güniz 
%D 2001
%T Energy optimization of the Yankee-Hood dryer
%B 2001
%9 dryers; heat transfer; energetic optimising; 
%! Energy optimization of the Yankee-Hood dryer
%K dryers; heat transfer; energetic optimising; 
%X The Yankee-Hood dryer is the crucial section of the paper machine due to the consumption of energy. As a consequence of continuously increasing energy costs, determination of the proper operating conditions is essential to operate the tissue machine in the most efficient and economic means while ensuring paper quality. The objective of this study is to evaluate the Yankee-Hood dryer in 'lpekkagit' tissue paper factory, set the mass and energy balances and make optimization studies in order to achieve the desired production rate whilst keeping the drying parameters within limits at the minimum energy costs. The approach to solve the problem is to develop a steady state analytical model. The complicated drying system is simplified as the overall and sub systems. Material and energy balances are set up for each system. Data of machine parameters at several paper grades are collected at the factory during production. Material and energy balance equations are solved with the available data for the unknown parameters and for the determination of the drying parameters most effective on energy consumption. The critical drying parameters are air supply velocity, wet- and dry-hood temperatures, steam pressure in cylinder and exhaust humidity. Efficiency, defined as the ratio of energy required to evaporate the water to energy input through the system boundaries, is calculated as 28-30% for different grades of tissue paper production. Steady state rate of heat transfer to the wet sheet is analyzed considering the two-way mechanism, from steam through the cast iron shell and from heated air. The transfer of heat is eased in both mechanisms by the lightweight tissue paper that has a comparatively lower internal thermal resistance with respect to other types of paper products. Steam side is modeled considering different thermal resistances in series: Condensate layer, shell, shell-sheet contact, and paper sheet. These resistances are to the same order of magnitude, cast iron shell being the largest and paper sheet the smallest in value. Sheet- shell contact heat transfer coefficient is strongly dependent on sheet moisture content that is assumed to vary almost linearly due to the angular position on the Yankee. Air side heat transfer is mostly affected by the temperature, humidity and velocity the air that is blown on to the sheet. Calculations resulted out that rate of heat transfer from air side 55-65% while that from steam side is 35-45% of their total indicating the dominance of air side on drying.
%U https://www.sv-jme.eu/sl/article/energy-optimization-of-the-yankee-hood-dryer/
%0 Journal Article
%R 
%& 512
%P 7
%J Strojniški vestnik - Journal of Mechanical Engineering
%V 47
%N 8
%@ 0039-2480
%8 2017-07-07
%7 2017-07-07
Önel, Selis, & Güniz  Gürüz.
"Energy optimization of the Yankee-Hood dryer." Strojniški vestnik - Journal of Mechanical Engineering [Online], 47.8 (2001): 512-518. Web.  21 Jan. 2020
TY  - JOUR
AU  - Önel, Selis 
AU  - Gürüz, Güniz 
PY  - 2001
TI  - Energy optimization of the Yankee-Hood dryer
JF  - Strojniški vestnik - Journal of Mechanical Engineering
DO  - 
KW  - dryers; heat transfer; energetic optimising; 
N2  - The Yankee-Hood dryer is the crucial section of the paper machine due to the consumption of energy. As a consequence of continuously increasing energy costs, determination of the proper operating conditions is essential to operate the tissue machine in the most efficient and economic means while ensuring paper quality. The objective of this study is to evaluate the Yankee-Hood dryer in 'lpekkagit' tissue paper factory, set the mass and energy balances and make optimization studies in order to achieve the desired production rate whilst keeping the drying parameters within limits at the minimum energy costs. The approach to solve the problem is to develop a steady state analytical model. The complicated drying system is simplified as the overall and sub systems. Material and energy balances are set up for each system. Data of machine parameters at several paper grades are collected at the factory during production. Material and energy balance equations are solved with the available data for the unknown parameters and for the determination of the drying parameters most effective on energy consumption. The critical drying parameters are air supply velocity, wet- and dry-hood temperatures, steam pressure in cylinder and exhaust humidity. Efficiency, defined as the ratio of energy required to evaporate the water to energy input through the system boundaries, is calculated as 28-30% for different grades of tissue paper production. Steady state rate of heat transfer to the wet sheet is analyzed considering the two-way mechanism, from steam through the cast iron shell and from heated air. The transfer of heat is eased in both mechanisms by the lightweight tissue paper that has a comparatively lower internal thermal resistance with respect to other types of paper products. Steam side is modeled considering different thermal resistances in series: Condensate layer, shell, shell-sheet contact, and paper sheet. These resistances are to the same order of magnitude, cast iron shell being the largest and paper sheet the smallest in value. Sheet- shell contact heat transfer coefficient is strongly dependent on sheet moisture content that is assumed to vary almost linearly due to the angular position on the Yankee. Air side heat transfer is mostly affected by the temperature, humidity and velocity the air that is blown on to the sheet. Calculations resulted out that rate of heat transfer from air side 55-65% while that from steam side is 35-45% of their total indicating the dominance of air side on drying.
UR  - https://www.sv-jme.eu/sl/article/energy-optimization-of-the-yankee-hood-dryer/
@article{{}{.},
	author = {Önel, S., Gürüz, G.},
	title = {Energy optimization of the Yankee-Hood dryer},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {47},
	number = {8},
	year = {2001},
	doi = {},
	url = {https://www.sv-jme.eu/sl/article/energy-optimization-of-the-yankee-hood-dryer/}
}
TY  - JOUR
AU  - Önel, Selis 
AU  - Gürüz, Güniz 
PY  - 2017/07/07
TI  - Energy optimization of the Yankee-Hood dryer
JF  - Strojniški vestnik - Journal of Mechanical Engineering; Vol 47, No 8 (2001): Strojniški vestnik - Journal of Mechanical Engineering
DO  - 
KW  - dryers, heat transfer, energetic optimising, 
N2  - The Yankee-Hood dryer is the crucial section of the paper machine due to the consumption of energy. As a consequence of continuously increasing energy costs, determination of the proper operating conditions is essential to operate the tissue machine in the most efficient and economic means while ensuring paper quality. The objective of this study is to evaluate the Yankee-Hood dryer in 'lpekkagit' tissue paper factory, set the mass and energy balances and make optimization studies in order to achieve the desired production rate whilst keeping the drying parameters within limits at the minimum energy costs. The approach to solve the problem is to develop a steady state analytical model. The complicated drying system is simplified as the overall and sub systems. Material and energy balances are set up for each system. Data of machine parameters at several paper grades are collected at the factory during production. Material and energy balance equations are solved with the available data for the unknown parameters and for the determination of the drying parameters most effective on energy consumption. The critical drying parameters are air supply velocity, wet- and dry-hood temperatures, steam pressure in cylinder and exhaust humidity. Efficiency, defined as the ratio of energy required to evaporate the water to energy input through the system boundaries, is calculated as 28-30% for different grades of tissue paper production. Steady state rate of heat transfer to the wet sheet is analyzed considering the two-way mechanism, from steam through the cast iron shell and from heated air. The transfer of heat is eased in both mechanisms by the lightweight tissue paper that has a comparatively lower internal thermal resistance with respect to other types of paper products. Steam side is modeled considering different thermal resistances in series: Condensate layer, shell, shell-sheet contact, and paper sheet. These resistances are to the same order of magnitude, cast iron shell being the largest and paper sheet the smallest in value. Sheet- shell contact heat transfer coefficient is strongly dependent on sheet moisture content that is assumed to vary almost linearly due to the angular position on the Yankee. Air side heat transfer is mostly affected by the temperature, humidity and velocity the air that is blown on to the sheet. Calculations resulted out that rate of heat transfer from air side 55-65% while that from steam side is 35-45% of their total indicating the dominance of air side on drying.
UR  - https://www.sv-jme.eu/sl/article/energy-optimization-of-the-yankee-hood-dryer/
Önel, Selis, AND Gürüz, Güniz.
"Energy optimization of the Yankee-Hood dryer" Strojniški vestnik - Journal of Mechanical Engineering [Online], Volume 47 Number 8 (07 July 2017)

Avtorji

Inštitucije

  • Middle East Technical University, Department of Chemical Engineering, Ankara, Turkey
  • Middle East Technical University, Department of Chemical Engineering, Ankara, Turkey

Informacije o papirju

Strojniški vestnik - Journal of Mechanical Engineering 47(2001)8, 512-518

The Yankee-Hood dryer is the crucial section of the paper machine due to the consumption of energy. As a consequence of continuously increasing energy costs, determination of the proper operating conditions is essential to operate the tissue machine in the most efficient and economic means while ensuring paper quality. The objective of this study is to evaluate the Yankee-Hood dryer in 'lpekkagit' tissue paper factory, set the mass and energy balances and make optimization studies in order to achieve the desired production rate whilst keeping the drying parameters within limits at the minimum energy costs. The approach to solve the problem is to develop a steady state analytical model. The complicated drying system is simplified as the overall and sub systems. Material and energy balances are set up for each system. Data of machine parameters at several paper grades are collected at the factory during production. Material and energy balance equations are solved with the available data for the unknown parameters and for the determination of the drying parameters most effective on energy consumption. The critical drying parameters are air supply velocity, wet- and dry-hood temperatures, steam pressure in cylinder and exhaust humidity. Efficiency, defined as the ratio of energy required to evaporate the water to energy input through the system boundaries, is calculated as 28-30% for different grades of tissue paper production. Steady state rate of heat transfer to the wet sheet is analyzed considering the two-way mechanism, from steam through the cast iron shell and from heated air. The transfer of heat is eased in both mechanisms by the lightweight tissue paper that has a comparatively lower internal thermal resistance with respect to other types of paper products. Steam side is modeled considering different thermal resistances in series: Condensate layer, shell, shell-sheet contact, and paper sheet. These resistances are to the same order of magnitude, cast iron shell being the largest and paper sheet the smallest in value. Sheet- shell contact heat transfer coefficient is strongly dependent on sheet moisture content that is assumed to vary almost linearly due to the angular position on the Yankee. Air side heat transfer is mostly affected by the temperature, humidity and velocity the air that is blown on to the sheet. Calculations resulted out that rate of heat transfer from air side 55-65% while that from steam side is 35-45% of their total indicating the dominance of air side on drying.

dryers; heat transfer; energetic optimising;