Numerical routine for magnetic heat pump cascading

Konstantin Filonenko, Tian Lei, Kurt Engelbrecht, Christian Bahl, Christian Veje

Publikation: Konferencebidrag uden forlag/tidsskriftPosterForskningpeer review

22 Downloads (Pure)

Resumé

Heat pumps use low-temperature heat absorbed from the energy source to create temperature gradient (TG) across the energy sink. Magnetic heat pumps (MHP) can perform this function through operating active magnetic regeneration (AMR) cycle. For building heating, TGs of up to a few K might be necessary, which is hardly achievable with a single MHP and such techniques as cascading are required. Series and parallel cascading increase the AMR span and heating power, respectively, but do not change TG. Therefore, the intermediate type of cascading was proposed with individual MHPs separately connected at their cold and hot sides [1]. In these works, a single MHP is separated into smaller cascaded MHPs with the same total mass. This kind of mass redistribution is hard to implement experimentally since several prototypes with different AMR number and sizes should be constructed. In this theoretical study, instead of changing individual AMR sizes, we rearranged parallel-connected AMRs in separate blocks (HP1, HP2 and HP3 in Fig. 1(a)) and connected the cold (hot) outlet of one block to the cold (hot) inlet of the next block giving a cascading configuration. Thus, not only the total mass but also the total number of AMRs remain constant, making this configuration easier to implement. A MATLAB routine for cascading simulation from a single AMR data was implemented. Calculated heating power for configuration in Fig. 1(a) is plotted in Fig. 1(b) and the cold- and hot-side TGs are around 2 K and 3 K. Changing the number of MHPs, we optimized input parameters to achieve maximum heating powers. We have found that both maximum heating power and COP decrease together with number of heat pumps, but the TGs and the temperature span can be largely increased.

References
[1] M. Tahavori et al., “A Cascading Model Of An Active Magnetic Regenerator System”, In Proceedings of the 7th International Conference on Magnetic Refrigeration at Room Temperature (2016) 248-251
OriginalsprogEngelsk
Publikationsdato2. okt. 2017
Antal sider1
StatusUdgivet - 2. okt. 2017
BegivenhedDanish Days 2017 on Caloric Materials and Devices - Technical University of Denmark, Risø Campus, Roskilde, Danmark
Varighed: 2. okt. 20173. okt. 2017
http://www.danishdays.dk/

Konference

KonferenceDanish Days 2017 on Caloric Materials and Devices
LokationTechnical University of Denmark, Risø Campus
LandDanmark
ByRoskilde
Periode02/10/201703/10/2017
Internetadresse

Fingeraftryk

Pumps
Heating
Thermal gradients
Magnetic refrigeration
Regenerators
Temperature
MATLAB
Hot Temperature

Citer dette

Filonenko, K., Lei, T., Engelbrecht, K., Bahl, C., & Veje, C. (2017). Numerical routine for magnetic heat pump cascading. Poster session præsenteret på Danish Days 2017 on Caloric Materials and Devices, Roskilde, Danmark.
Filonenko, Konstantin ; Lei, Tian ; Engelbrecht, Kurt ; Bahl, Christian ; Veje, Christian . / Numerical routine for magnetic heat pump cascading. Poster session præsenteret på Danish Days 2017 on Caloric Materials and Devices, Roskilde, Danmark.1 s.
@conference{59582a9d789f4c5fb146bfc951f824de,
title = "Numerical routine for magnetic heat pump cascading",
abstract = "Heat pumps use low-temperature heat absorbed from the energy source to create temperature gradient (TG) across the energy sink. Magnetic heat pumps (MHP) can perform this function through operating active magnetic regeneration (AMR) cycle. For building heating, TGs of up to a few K might be necessary, which is hardly achievable with a single MHP and such techniques as cascading are required. Series and parallel cascading increase the AMR span and heating power, respectively, but do not change TG. Therefore, the intermediate type of cascading was proposed with individual MHPs separately connected at their cold and hot sides [1]. In these works, a single MHP is separated into smaller cascaded MHPs with the same total mass. This kind of mass redistribution is hard to implement experimentally since several prototypes with different AMR number and sizes should be constructed. In this theoretical study, instead of changing individual AMR sizes, we rearranged parallel-connected AMRs in separate blocks (HP1, HP2 and HP3 in Fig. 1(a)) and connected the cold (hot) outlet of one block to the cold (hot) inlet of the next block giving a cascading configuration. Thus, not only the total mass but also the total number of AMRs remain constant, making this configuration easier to implement. A MATLAB routine for cascading simulation from a single AMR data was implemented. Calculated heating power for configuration in Fig. 1(a) is plotted in Fig. 1(b) and the cold- and hot-side TGs are around 2 K and 3 K. Changing the number of MHPs, we optimized input parameters to achieve maximum heating powers. We have found that both maximum heating power and COP decrease together with number of heat pumps, but the TGs and the temperature span can be largely increased.References[1] M. Tahavori et al., “A Cascading Model Of An Active Magnetic Regenerator System”, In Proceedings of the 7th International Conference on Magnetic Refrigeration at Room Temperature (2016) 248-251",
keywords = "heat pump, Magnetocalorics, Heating Systems, caloric materials, refrigeration, Geothermal, low-energy buildings, Hydronic heating, Floor heating, Heat transfer, pump losses, Thermodynamics, ground source heat pump, temperature span, temperature, magnetocaloric materials, mass flow, Pressure",
author = "Konstantin Filonenko and Tian Lei and Kurt Engelbrecht and Christian Bahl and Christian Veje",
year = "2017",
month = "10",
day = "2",
language = "English",
note = "Danish Days 2017 on Caloric Materials and Devices ; Conference date: 02-10-2017 Through 03-10-2017",
url = "http://www.danishdays.dk/",

}

Filonenko, K, Lei, T, Engelbrecht, K, Bahl, C & Veje, C 2017, 'Numerical routine for magnetic heat pump cascading' Danish Days 2017 on Caloric Materials and Devices, Roskilde, Danmark, 02/10/2017 - 03/10/2017, .

Numerical routine for magnetic heat pump cascading. / Filonenko, Konstantin; Lei, Tian; Engelbrecht, Kurt ; Bahl, Christian; Veje, Christian .

2017. Poster session præsenteret på Danish Days 2017 on Caloric Materials and Devices, Roskilde, Danmark.

Publikation: Konferencebidrag uden forlag/tidsskriftPosterForskningpeer review

TY - CONF

T1 - Numerical routine for magnetic heat pump cascading

AU - Filonenko, Konstantin

AU - Lei, Tian

AU - Engelbrecht, Kurt

AU - Bahl, Christian

AU - Veje, Christian

PY - 2017/10/2

Y1 - 2017/10/2

N2 - Heat pumps use low-temperature heat absorbed from the energy source to create temperature gradient (TG) across the energy sink. Magnetic heat pumps (MHP) can perform this function through operating active magnetic regeneration (AMR) cycle. For building heating, TGs of up to a few K might be necessary, which is hardly achievable with a single MHP and such techniques as cascading are required. Series and parallel cascading increase the AMR span and heating power, respectively, but do not change TG. Therefore, the intermediate type of cascading was proposed with individual MHPs separately connected at their cold and hot sides [1]. In these works, a single MHP is separated into smaller cascaded MHPs with the same total mass. This kind of mass redistribution is hard to implement experimentally since several prototypes with different AMR number and sizes should be constructed. In this theoretical study, instead of changing individual AMR sizes, we rearranged parallel-connected AMRs in separate blocks (HP1, HP2 and HP3 in Fig. 1(a)) and connected the cold (hot) outlet of one block to the cold (hot) inlet of the next block giving a cascading configuration. Thus, not only the total mass but also the total number of AMRs remain constant, making this configuration easier to implement. A MATLAB routine for cascading simulation from a single AMR data was implemented. Calculated heating power for configuration in Fig. 1(a) is plotted in Fig. 1(b) and the cold- and hot-side TGs are around 2 K and 3 K. Changing the number of MHPs, we optimized input parameters to achieve maximum heating powers. We have found that both maximum heating power and COP decrease together with number of heat pumps, but the TGs and the temperature span can be largely increased.References[1] M. Tahavori et al., “A Cascading Model Of An Active Magnetic Regenerator System”, In Proceedings of the 7th International Conference on Magnetic Refrigeration at Room Temperature (2016) 248-251

AB - Heat pumps use low-temperature heat absorbed from the energy source to create temperature gradient (TG) across the energy sink. Magnetic heat pumps (MHP) can perform this function through operating active magnetic regeneration (AMR) cycle. For building heating, TGs of up to a few K might be necessary, which is hardly achievable with a single MHP and such techniques as cascading are required. Series and parallel cascading increase the AMR span and heating power, respectively, but do not change TG. Therefore, the intermediate type of cascading was proposed with individual MHPs separately connected at their cold and hot sides [1]. In these works, a single MHP is separated into smaller cascaded MHPs with the same total mass. This kind of mass redistribution is hard to implement experimentally since several prototypes with different AMR number and sizes should be constructed. In this theoretical study, instead of changing individual AMR sizes, we rearranged parallel-connected AMRs in separate blocks (HP1, HP2 and HP3 in Fig. 1(a)) and connected the cold (hot) outlet of one block to the cold (hot) inlet of the next block giving a cascading configuration. Thus, not only the total mass but also the total number of AMRs remain constant, making this configuration easier to implement. A MATLAB routine for cascading simulation from a single AMR data was implemented. Calculated heating power for configuration in Fig. 1(a) is plotted in Fig. 1(b) and the cold- and hot-side TGs are around 2 K and 3 K. Changing the number of MHPs, we optimized input parameters to achieve maximum heating powers. We have found that both maximum heating power and COP decrease together with number of heat pumps, but the TGs and the temperature span can be largely increased.References[1] M. Tahavori et al., “A Cascading Model Of An Active Magnetic Regenerator System”, In Proceedings of the 7th International Conference on Magnetic Refrigeration at Room Temperature (2016) 248-251

KW - heat pump

KW - Magnetocalorics

KW - Heating Systems

KW - caloric materials

KW - refrigeration

KW - Geothermal

KW - low-energy buildings

KW - Hydronic heating

KW - Floor heating

KW - Heat transfer

KW - pump losses

KW - Thermodynamics

KW - ground source heat pump

KW - temperature span

KW - temperature

KW - magnetocaloric materials

KW - mass flow

KW - Pressure

M3 - Poster

ER -

Filonenko K, Lei T, Engelbrecht K, Bahl C, Veje C. Numerical routine for magnetic heat pump cascading. 2017. Poster session præsenteret på Danish Days 2017 on Caloric Materials and Devices, Roskilde, Danmark.