TEMPERATURE CONTROL OF VIBRATING HEAT-GENERATING HARDWARE USING SPRAY EVAPORATIVE COOLING IN THE NUCLEATE BOILING REGION

TY - JOUR

T1 - TEMPERATURE CONTROL OF VIBRATING HEAT-GENERATING HARDWARE USING SPRAY EVAPORATIVE COOLING IN THE NUCLEATE BOILING REGION

AU - Sarmadian, A

AU - Dunne, JF

AU - Jose, J Thalackottore

AU - Long, CA

AU - Pirault, JP

N1 - Funding Information: The authors acknowledge support for the development of the experimental facilities, in terms of funding from the EPSRC (under Contract Number: EP/M005755/1), and technical support from Ford Dunton UK, Ford Dearborn USA, Denso Italy, and the Ricardo Technical Centre Shoreham UK. The authors also wish to acknowledge additional financial and technical support from the Ricardo Shoreham Technical Centre, UK. Publisher Copyright: © 2021 Elsevier Ltd

PY - 2022/1/5

Y1 - 2022/1/5

N2 - A temperature control approach using evaporative spray cooling of vibrating surfaces in the nucleate boiling region is proposed and verified experimentally. This is relevant to temperature control of heat-generating automotive vehicle components. By exploiting an experimentally calibrated dynamic correlation model to represent evaporative spray cooling of a flat test-piece, a PID controller has been adopted with emphasis focused on the choice of gain parameters to ensure both stability of temperature control, and favourable responses in terms of relevant performance measures. Optimum linearisation of the correlation model has been achieved by solving an appropriate Wiener-Hopf equation, mainly to undertake a practical stability assessment of the closed-loop temperature control system. To verify the predicted control system performance, experimental measurements have been obtained from an instrumented, and spray-evaporatively-cooled, flat test-piece exposed to displacement vibration from a shaker. Experimental testing, appropriate to automotive vehicle component applications, includes large-amplitude, low frequency vibration at 12 mm and 1.9 Hz, and low amplitude, high-frequency vibration at 0.02 mm and 400 Hz. To assess the effects of different PID controller gains on the thermal performance of the thermal management system, a coefficient of performance (COP) is used, defined as the ratio of heat power removal to the required pumping power. To achieve a reduction in the settling time, and an increase in the rise time of stable control, a PID controller with a negative proportional gain showed most promising results. A 10.5% increase in COP was achieved in comparison to a PID controller with positive gains. This information is useful for the design and optimization of thermal management systems using evaporative spray cooling.

AB - A temperature control approach using evaporative spray cooling of vibrating surfaces in the nucleate boiling region is proposed and verified experimentally. This is relevant to temperature control of heat-generating automotive vehicle components. By exploiting an experimentally calibrated dynamic correlation model to represent evaporative spray cooling of a flat test-piece, a PID controller has been adopted with emphasis focused on the choice of gain parameters to ensure both stability of temperature control, and favourable responses in terms of relevant performance measures. Optimum linearisation of the correlation model has been achieved by solving an appropriate Wiener-Hopf equation, mainly to undertake a practical stability assessment of the closed-loop temperature control system. To verify the predicted control system performance, experimental measurements have been obtained from an instrumented, and spray-evaporatively-cooled, flat test-piece exposed to displacement vibration from a shaker. Experimental testing, appropriate to automotive vehicle component applications, includes large-amplitude, low frequency vibration at 12 mm and 1.9 Hz, and low amplitude, high-frequency vibration at 0.02 mm and 400 Hz. To assess the effects of different PID controller gains on the thermal performance of the thermal management system, a coefficient of performance (COP) is used, defined as the ratio of heat power removal to the required pumping power. To achieve a reduction in the settling time, and an increase in the rise time of stable control, a PID controller with a negative proportional gain showed most promising results. A 10.5% increase in COP was achieved in comparison to a PID controller with positive gains. This information is useful for the design and optimization of thermal management systems using evaporative spray cooling.

UR - http://www.scopus.com/inward/record.url?scp=85118323126&partnerID=8YFLogxK

U2 - 10.1016/j.applthermaleng.2021.117710

DO - 10.1016/j.applthermaleng.2021.117710

M3 - Article

SN - 1359-4311

VL - 200

SP - 117710

JO - APPLIED THERMAL ENGINEERING

JF - APPLIED THERMAL ENGINEERING

M1 - 117710

ER -