Publication detail

Process and utility systems integration and optimisation for ultra-low energy milk powder production

Walmsley, T.G. Atkins, M.J. Walmsley, M.R. Philipp, M. Peesel, R.H.

Original Title

Process and utility systems integration and optimisation for ultra-low energy milk powder production

Type

journal article in Web of Science

Language

English

Original Abstract

This study applies a Total Site Heat Integration approach in conjunction with a detailed process and utility model, to develop an innovative ultra-low energy milk powder plant design. The basis for the analysis is a state-of-the-art modern milk powder plant that requires 5265 MJ/tp of fuel and 210.5 kWh/tp (58.5 MJe/tp) of electricity. The model of the modern milk powder plant was validated against industrial data and changes to process and/or utility systems are targeted and implemented into the model to understand the impacts on thermal and electrical demands and emissions. Results show that seven significant changes are beneficial: (1) pre-concentration of milk to 30% using reverse osmosis, (2) a two-stage intermediate concentrate (30%) homogenisation to enable high solids (60%) spray drying, (3) an ultra-low energy Mechanical Vapour Recompression evaporator system, (4) spray dryer exhaust heat recovery, (5) condensing economiser for the boiler, (6) upgrade and integration of chiller condenser heat with hot water utility systems, and (7) recycling of air in the building ventilation system. These changes are estimated to reduce thermal energy use by 51.5%, electricity use by 19.0%, and emissions by 48.6% compared to a modern milk powder plant.

Keywords

Energy utilization; Industrial emissions; Ventilation; Ventilation exhausts; Waste heat; Water recycling; Building ventilations; Electrical demand; Evaporator systems; Exhaust heat recovery; Pre-concentration; State of the art; Thermal energy use; Vapour recompression; Integration;

Authors

Walmsley, T.G.; Atkins, M.J.; Walmsley, M.R.; Philipp, M.; Peesel, R.H.

Released

1. 3. 2018

ISBN

0360-5442

Periodical

Energy

Number

146

State

United Kingdom of Great Britain and Northern Ireland

Pages from

67

Pages to

81

Pages count

15

BibTex

@article{BUT145943,
  author="Walmsley, T.G. and Atkins, M.J. and Walmsley, M.R. and Philipp, M. and Peesel, R.H.",
  title="Process and utility systems integration and optimisation for ultra-low energy milk powder production",
  journal="Energy",
  year="2018",
  number="146",
  pages="67--81",
  doi="10.1016/j.energy.2017.04.142",
  issn="0360-5442"
}