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Application of Three‐Vapor Recompression Heat‐Pump Concepts to a Dimethylformamide–Water Distillation Column for Energy Savings
Author(s) -
Gao Xiaoxin,
Ma Zhengfei,
Ma Jiangquan,
Yang Limin
Publication year - 2014
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201300141
Subject(s) - distillation , heat pump , fractionating column , vapor compression evaporation , vacuum distillation , multiple effect distillation , process engineering , fractional distillation , extractive distillation , chemistry , reboiler , thermodynamics , materials science , chromatography , heat transfer , heat exchanger , engineering , physics
An N , N ‐dimethylformamide (DMF)/water mixture was selected to analyze several distillation‐assisted mechanical vapor‐recompression (MVR) heat‐pump processes compared to conventional distillation. Four distillation processes (i.e., conventional, a single MVR, MVR‐conventional, and two‐stage MVR‐double‐column heat pumps) were simulated by using the Aspen software platform to determine the energy savings and best alternative. The research results showed that a single MVR heat‐pump distillation can save 21.4 % of the energy consumption as compared to conventional distillation; the MVR‐conventional heat‐pump distillation and the two‐stage MVR‐double‐column heat‐pump distillation can save 71.1 % and 74.6 % of the energy load, respectively.