Control Oriented Model of Cabin-HVAC System in a Long-Haul Trucks for Energy Management Applications 2022-01-0179
Super Truck II is a 48V mild hybrid class 8 truck with an all auxiliary loads powered purely by the battery pack. Electric Heating Ventilation and Air Conditioning (HVAC) load is the most prominent battery load during the hotel period, when the truck driver is resting inside the sleeper. For the PACCAR Super Truck II (ST-II) project a 48 V battery system provides the required power during the hotel period. A cabin-HVAC model estimates the electric load on the 48V battery system, allowing the control system to implement an efficient energy management strategy that avoids engine idling during the hotel period. The thermal model accounts for the sun load due to the time of day and the geographic location of the truck during the hotel period. The cabin-HVAC model has two parts. First, a grey box model with two heat exchangers (Condenser and Evaporator) working in unison with refrigerant mass flow rate as an input and HVAC load as an output. Second, a two-node cabin model formulated to estimate the cabin temperature as a function of the Global Horizontal Irradiance (GHI), HVAC load and ambient temperature. The models are calibrated using experimental cabin-HVAC system data as for long-haul class 8 truck (e.g. ST-II). The model simulations show that the overall Root Mean Square Error (RMSE) value of 0.4°C between the experimental and simulated cabin temperature.
Citation: Khuntia, S., Hanif, A., Singh, S., and Ahmed, Q., "Control Oriented Model of Cabin-HVAC System in a Long-Haul Trucks for Energy Management Applications," SAE Technical Paper 2022-01-0179, 2022, https://doi.org/10.4271/2022-01-0179. Download Citation
Author(s):
Satvik Khuntia, Athar Hanif, Somendra Pratap Singh, Qadeer Ahmed
Affiliated:
The Ohio State University
Pages: 12
Event:
WCX SAE World Congress Experience
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Heating, ventilation, and air conditioning systems (HVAC)
Battery packs
Heavy trucks
Hybrid electric vehicles
Energy conservation
Computational fluid dynamics
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