Ensuring good ventilation is crucial for reducing the pollution caused by cooking activities in the indoor environment. Among them

fume exhaust devices as a vital component of kitchen ventilation

and their performance is particularly critical. Merely increasing the air volume of exhaust devices to remove fumes not only leads to the higher energy consumption of exhaust fans

but also has limited practical effect on reducing pollution. For improving the ventilation condition and reducing the energy consumption of supply and exhaust fan

a new ventilation system for kitchen with integrated stove air supply-exhaust (ISASE) was developed in this study. Firstly

the orthogonal experiment was utilized for arranging different combination schemes of five influencing factors

including the emission rate

exhaust flow

upper air supply angle

upper and lower air supply velocities. Then

the effect of ISASE in reducing the intake fraction of PM

2.5

under each scheme was studied by using the computational fluid dynamics method. The energy consumption of this system under different ventilation schemes was investigated with on-site testing. Finally

performance-gaining rate was proposed by introducing intake fraction reduction rate and energy consumption growth rate to quantitatively evaluate the performance advantage of ISASE. Polynomial fitting was a

lso used to explore the energy-saving effect of ISASE at high emission rate. The results showed that at low

medium

and high emission rates

the intake fraction of PM

2.5

was reduced by 65.0 %–84.2 %. However

the energy consumption of ISASE merely increased by 7.4 %–16.8 % compared with traditional integrated stove without air supply conditions. Its maximum performance-gaining rate reached 0.49–0.66. The energy-saving rate of ISASE was 46.7 % compared with traditional integrated stove without air supply when the same intake fraction was achieved at high emission rate. The practical schemes of ISASE at different emission rates were given in this study

which optimized the working performance of integrated stove and provided a useful reference for its innovative design.