US 12,072,116 B2
Method and system for controlling energy transfer of a thermal energy exchanger
Jürg Keller, Wangen bei Olten (CH); Armon Hänseler, Neerach (CH); Forest Reider, Seegraeben (CH); and Stefan Mischler, Wald (CH)
Assigned to BELIMO HOLDING AG, Hinwil (CH)
Appl. No. 17/054,856
Filed by BELIMO HOLDING AG, Hinwil (CH)
PCT Filed Jun. 11, 2019, PCT No. PCT/EP2019/065124
§ 371(c)(1), (2) Date Nov. 12, 2020,
PCT Pub. No. WO2019/238631, PCT Pub. Date Dec. 19, 2019.
Claims priority of application No. 00750/18 (CH), filed on Jun. 12, 2018.
Prior Publication US 2021/0215372 A1, Jul. 15, 2021
Int. Cl. F24F 11/64 (2018.01); F24F 11/46 (2018.01); F24F 11/83 (2018.01); F24F 110/10 (2018.01); G01F 1/12 (2006.01); G05B 15/02 (2006.01)
CPC F24F 11/64 (2018.01) [F24F 11/46 (2018.01); G01F 1/125 (2013.01); F24D 2220/044 (2013.01); F24F 11/83 (2018.01); F24F 2110/10 (2018.01); G05B 15/02 (2013.01); G05B 2219/2614 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A control system for controlling energy transfer of a thermal energy exchanger of an HVAC system, the control system comprising at least one processor configured to:
obtain from a flow sensor, a measured flow of fluid through the thermal energy exchanger;
obtain from a first temperature sensor, a supply temperature of the fluid in a supply pipe connected to an entry of the thermal energy exchanger;
obtain from a second temperature sensor, a return temperature of the fluid in a return pipe connected to an exit of the thermal energy exchanger;
determine flow-dependent model parameters for modelling performance of the thermal energy exchanger, using one or more measurement data sets, each measurement data set including for a respective measurement time a value of the measured flow of fluid, a value of the measured supply temperature of the fluid, and a value of the measured return temperature of the fluid;
calculate an estimated energy transfer of the thermal energy exchanger, using the flow-dependent model parameters, by
determining an estimated energy transport, extracted in the thermal energy exchanger from the fluid, by
determining an input temperature of the thermal energy exchanger, using the measured supply temperature and a delay time in the supply pipe for the fluid to move from the first temperature sensor to the thermal energy exchanger,
determining an output temperature of the thermal energy exchanger, using the measured return temperature and a delay time in the return pipe for the fluid to move from the thermal energy exchanger to the second temperature sensor, and
calculating the estimated energy transport from the measured flow of fluid, the input temperature of the thermal energy exchanger, and the output temperature of the thermal energy exchanger;
determining an energy content stored in the thermal energy exchanger, and
calculating the estimated energy transfer as a difference from the energy transport and the energy content; and
control the energy transfer of the thermal energy exchanger by regulating the flow of fluid through the thermal energy exchanger, using the estimated energy transfer.