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WP1.2 Coordination Meeting May 08, 2019
Meeting Report WP1.2 ‘Modelica library for MPC’
Subject: WP1.2
Date: 08-05-2019
Location: Skype for Business
Minutes taken by: Lieve Helsen (KU Leuven)
Company/Organisation Participant
KU Leuven Lieve Helsen (WP Leader)
KU Leuven Iago Cupeiro
KU Leuven Javier Arroyo (now @ LBNL)
SDU Kzrysztof Arendt
SDU Christian Veje
SDU Toa Yang
LBNL David Blum
PNNL Sen Huang
PNNL Chen Yan
Syntef Harald Taxt Walnum
Agenda is approved
Iago started the modifications agreed in Aachen, when ready the emulator will be sent to Valentin. Sen is making up the documentation and will send the emulator to Iago for review Javier and Dave have been working on the multi-zone office building (air-based) to make it BOP-TEST ready.
Dave modified the review checklist according to the suggestions made in Aachen, list of data needed to calculate the KPIs and data needed for forecast (Action Javier & Dave to finalize) Christian: Toa Yang takes over from Krzysztof (smooth continuation – thanks Krzysztof!), which means Toa will perform the review of Valentin’s model and the development of the SDU emulator.
IAQ metric: CO2 measurements as an indicator (was agreed on in Aachen), however in the US most designs are based on air exchange rate, which is outside air flow based (not CO2 based).
Yan: ASHRAE recommendation: requirements outside air delivered to the zone. IAQ option suggests to use CO2 concentration as a measure for IAQ and a recommended level. However delay in measurement and inaccurate sensors.
Harald: control is based on T and CO2 in new buildings, thus logic to use CO2 as an indicator for IAQ for control.
Krzysztof: comparison between controllers needs the same metric for all. US: mass flow rate of air-based system is usually determined by heating/cooling, not by hygienic ventilation Outside air CO2 concentration is a boundary condition, however not known. Choose one static value for each emulator (should be sufficient for the comparative study we aim for).
Conclusion: we use CO2 as a requirement for IAQ, recommended value for maximum value, mass balance for CO2 in emulator, outside air CO2 taken as a constant for each emulator.
Do all emulators need to have a ventilation system? Residential buildings usually have a constant mass flow rate, set a minimal value (associated to a minimal air exchange rate). Commercial buildings have demand-controlled ventilation.
ASHRAE 62.1 manual Page 169, "For offices, the CO2 concentration is about the same as what was recommended in previous versions of Standard 62 (about 525 ppm above ambient or 925 ppm at 400 ppm ambient). Concentrations for the other occupancy types listed, which are all densely occupied zones, are significantly higher than prior recommendations. This is due to the less conservative “code intended” philosophy used to determine ventilation rates."
LBNL submitted a proposal to DoE for a 3-years project to continue the BOP-TEST work. High chance to get it (DoE support is there).
Javier has been working on merging the KPI calculator, Data generator and Forecaster modules to the main branch of the BOPTEST prototype software. He has also been working on a Compilation module to enable the emulator developer to compile a Modelica model that is compliant with BOPTEST independently his/her operating system. Additionaly, with the Compilation module it's no longer required for the emulator developer to have JModelica installed to compile a model.
Krzysztof points out that it’s possible to compile an FMU in Windows and later in Linux, and put then all binaries in the same FMU.
No update
MPC review paper is ready for internal review (journal submission): Lieve and Michael both want to review but are hyper-busy these weeks/months.
a. Next WP1.2 progress meeting: June 13
b. Action: Lieve sends out a doodle for an August meeting to prepare the Rome meeting
c. Rome meeting: Lieve won’t be available on Saturday August 31
d. Thanks Krzysztof for all your contributions!! We will miss you, for sure! Good luck in your future endeavors!