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      Evaluation of a stratified tank based heat recovery loop via dynamic simulation

      Schlosser, Florian; Peesel, Ron-Hendrik; Meschede, Henning; Philipp, Matthias; Walmsley, Timothy Gordon
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      DOI
       10.3303/CET1870068
      Link
       www.cetjournal.it
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      Schlosser, F., Peesel, R.-H., Meschede, H., Philipp, M., & Walmsley, T. G. (2018). Evaluation of a stratified tank based heat recovery loop via dynamic simulation. Chemical Engineering Transactions, 70, 403–408. https://doi.org/10.3303/CET1870068
      Permanent Research Commons link: https://hdl.handle.net/10289/13298
      Abstract
      Prerequisite for hot water recovery in the dairy and beverage industry is the use of heat storage, such as stratified tanks. Total Site Heat Integration enables the targeting of heat recovery potential, the concrete identification of suitable sinks and source profiles and the dimensioning of intermediate circuits and storages. For a cost and energy efficient storage, the aim to maintain stratification by suitable thermocline control management. Dynamic simulation enables a reliable estimation of energy savings and correct storage/control design considering the changing operation times, source and sink loads as well as thermal inertias. This poses two challenges: model accuracy and acceptable simulation time. A stratified tank model with Variable Layer Height (VLH) is evolved reducing numeric diffusion effects. A sensitive analysis shows the increased accuracy with acceptable simulation time. As part of a case study, thermocline growth due to numeric diffusion is reduced up to approximately 35 % by a VLH model. The model is simulated for a case study in the dairy industry. It is shown that up to 94 % of the total heat recovery target can be achieved by the modelled heat recovery loop based on a stratified tank and the applied system control.
      Date
      2018
      Type
      Journal Article
      Rights
      Copyright © 2018, AIDIC Servizi S.r.l. Used with permission.
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      • Science and Engineering Papers [3121]
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