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Karlsson, Emelie , 2012. Potential för värmeåtervinning från mjölkkylanläggningar. Second cycle, A2E. Uppsala: SLU, Dept. of Energy and Technology



The present climate discussion has made energy efficiency an interesting topic. Saving energy does
not only help the climate but also saves money for the energy consumer.

The purpose of this thesis was to examine the potential of heat recovering from milk cooling. Two
milk farms, one with voluntary milking system, VMS, and the other with conventional milking system
was used to measure interesting temperatures and electricity consumptions. The numbers were used
both to do theoretical calculations and to construct a SIMULINK model.

To calculate the potential for heat at milk farms theoretical calculations were made in MATLAB using
a reference farm with different combinations of heat recovery and pre cooling. The farm was
assumed to keep a dwelling house with the annual heat consumption 18165 kWh. The calculations
showed that with 100 cattle 90 % of the heat needed was covered and 150 cattle are sufficient to
cover the entire need of heat. It also showed that pre cooling almost saved 50 % of the electricity
used by the compressor.

The SIMULINK model was constructed according to the VMS farm and showed that 200 cattle were
necessary to heat the house the entire year and 150 cattle covered 88 % of the energy needed.

Main title:Potential för värmeåtervinning från mjölkkylanläggningar
Authors:Karlsson, Emelie
Supervisor:Hansson, Per-Anders and Pettersson, Ola
Examiner:Johansson, Tord
Series:Examensarbete / Institutionen för energi och teknik, SLU
Volume/Sequential designation:2012:12
Year of Publication:2012
Level and depth descriptor:Second cycle, A2E
Student's programme affiliation:TENSY Energy Systems Engineering (admitted before July 1, 2007) 270 HEC
Supervising department:(NL, NJ) > Dept. of Energy and Technology
Keywords:mjölkkylning, mjölkkylanläggning, värmeåtervinning, energieffektivisering, mjölkproduktion
Permanent URL:
Subject. Use of subject categories until 2023-04-30.:Agricultural machinery and equipment
Deposited On:18 Jan 2013 13:14
Metadata Last Modified:18 Jan 2013 13:14

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