Optimal control of a fuel-fired auxiliary heater for an improved passenger vehicle warm-up

Müller, Eric A.; Onder, Christopher H.; Guzzella, Lino; Kneifel, Marcus

doi:10.1016/j.conengprac.2008.10.017

Cited by 13 publications

(8 citation statements)

References 2 publications

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“…Off-line thermal comfort management was more extensively studied for conventional and hybrid electric vehicles (HEVs). In [7][8][9], the authors developed an off-line approach that allows the best compromise between thermal comfort and fuel economy, over a trip of 1200 s. Other works solve the optimization problem in HEVs over a longer trip of 3000 s [10], which can be more representative of a realistic driving time.…”

Section: Energy and Thermal Comfort Management Methodsmentioning

confidence: 99%

“…The cold loop model consists in evaluating at each time step, the refrigerant enthalpy at each point of the thermodynamic cycle, and then the heat exchanges with the air and the power consumed by the compressor. Practically, the model computes the refrigerant evaporating and condensing temperature T 7 (evaporator) and T 4 (condenser) by solving the following heat balances Equations ( 7) and (8). In these equations, .…”

Section: = + (1 − )mentioning

confidence: 99%

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Optimal Management of Thermal Comfort and Driving Range in Electric Vehicles

et al. 2020

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The HVAC system represents the main auxiliary load in battery-powered electric vehicles (BEVs) and requires efficient control approaches that balance energy saving and thermal comfort. On the one hand, passengers always demand more comfort, but on the other hand the HVAC system consumption strongly impacts the vehicle’s driving range, which constitutes a major concern in BEVs. In this paper, a thermal comfort management approach that optimizes the thermal comfort while preserving the driving range during a trip is proposed. The electric vehicle is first modeled together with the HVAC and the passengers’ thermo-physiological behavior. Then, the thermal comfort management issue is formulated as an optimization problem solved by dynamic programing. Two representative test-cases of hot climates and traffic situations are simulated. In the first one, the energetic cost and ratio of improved comfort is quantified for different meteorological and traffic conditions. The second one highlights the traffic situation in which a trade-off between the driving speed and thermal comfort is important. A large number of weather and traffic situations are simulated and results show the efficiency of the proposed approach in minimizing energy consumption while maintaining a good comfort.

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Section: Energy and Thermal Comfort Management Methodsmentioning

confidence: 99%

Section: = + (1 − )mentioning

confidence: 99%

Optimal Management of Thermal Comfort and Driving Range in Electric Vehicles

et al. 2020

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“…To the best of our knowledge, the aerosol emissions from fuel-operated auxiliary heaters have not been studied and reported in the scientific literature. Previous studies have only focused on improving the thermal efficiency or fuel economy of the heaters [6]. Conversely, AHs have also been used as artificial soot generators in laboratories after modifying their combustion parameters [7], which do not represent normal use emissions.…”

Section: Introductionmentioning

confidence: 99%

Fuel-Operated Auxiliary Heaters Are a Major Additional Source of Vehicular Particulate Emissions in Cold Regions

et al. 2021

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Fuel-operated auxiliary heaters (AHs) can be notable sources of particle emissions from vehicles. The emissions of AHs are unregulated, and the number of devices is high; therefore, they make considerable contributions to local air quality, and even the global emissions budget. Experiments for studying the emissions were performed in Finland for a total of eight selected vehicles with Original Equipment Manufacturer (OEM) AHs installed, including both diesel- and gasoline-operated heaters. We present the numerical results of particle emissions and compare the particle concentrations in the AH exhaust to values found in the tailpipe exhaust of the same vehicle. Our results show that the emissions from auxiliary heaters are typically several orders of magnitude higher than of a car exhaust when idling. This raises the question of whether the use of heaters is justified based on the goal to reduce total emissions from vehicle use; furthermore, whether fuel-operated heaters should also be applied in electric vehicles for cabin heating. More research will be needed to characterize the emissions more thoroughly to understand the air quality and climate effects from AHs, and to provide further recommendations on the use of these heaters.

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“…As the independent heat source,it is widely used in engine warm-up in low temperature environment because it can work well and cannot be affected by the working condition of engine. It has lots of advantages such as starting fast, steady and high-efficiency [1]. Recently, vehicle preheater is widely researched by scholars.…”

Section: Introductionmentioning

confidence: 99%

Optimal Designing of Heavy Duty Vehicle Preheater System

Shao¹,

Li²,

Li³

et al. 2015

Proceedings of the International Conference on Computer Information Systems and Industrial Applications

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As the auxiliary preheat device for vehicle, vehicle preheater has been widely adopted for vehicle cold starting, preheating and defrosting. The three-dimensional geometric model of preheater is established in this paper. The combustion process of preheater with different structures has been simulated. The simulation results reveal that the proper conical hood diameter could simulate the mixture between fuel and gas apparently and improve preheater combustion efficiency, combustion tube length affects the mixture between fuel and gas, the temperature distribution in the tube as well as also affects the lifetime of preheater, and different fin height has a great influence on the outlet temperature of preheater. Research results contribute to the design and development of preheater, and also put forward the improvement direction of preheater.

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Optimal control of a fuel-fired auxiliary heater for an improved passenger vehicle warm-up

Cited by 13 publications

References 2 publications

Optimal Management of Thermal Comfort and Driving Range in Electric Vehicles

Optimal Management of Thermal Comfort and Driving Range in Electric Vehicles

Fuel-Operated Auxiliary Heaters Are a Major Additional Source of Vehicular Particulate Emissions in Cold Regions

Optimal Designing of Heavy Duty Vehicle Preheater System

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