In this study, experiments were carried out to investigate the important
parameters influencing on the performance of a washer-dryer and analyze
the influence of the said parameters on energy efficiency, condensation
efficiency, and dryer time performance. Through parametric analysis, th...
In this study, experiments were carried out to investigate the important
parameters influencing on the performance of a washer-dryer and analyze
the influence of the said parameters on energy efficiency, condensation
efficiency, and dryer time performance. Through parametric analysis, the
study additionally airs to understand the underlying physical mechanisms
by which a washer dryer without a condensation heat exchanger operates,
and derives a transfer function through both the parametric study and
sensitivity analysis. For consistent results, all experiments were carried out
at predetermined, constant temperature and relative humidity.
When the flow rate of incoming drying air decreased, the surface
temperature of the heater inside washer-dryer underwent a series of rapid
on-off cycle and the amount of heat carried into the inner drum structure
also diminished, which resulted in the overall lower rate of evaporation of
moisture from the clothing accompanied with longer drying process time;
consequently, the overall energy efficiency of the washer-dryer decreased.
On the other hand, when the flow rate increased, a bottleneck existed
where the drying performance was adversely affected. Due to limited
heater capacity, exiting air temperature near the heater began to decrease
after the incoming airflow exceeded a certain threshold, and the drying
efficiency declined. In the current study, the optimal air flow rate was
found to be 74 cubic meters per hour (CMH).
Further parametric study was performed by varying the heater capacity.
It was found that indefinitely increasing the heater capacity did not result
in improved washer-dryer performance, and lowering the heater capacity
below a certain level also resulted in performance deterioration due to
increased pre-heating process. The optimal heater capacity for the current
system was found to be 1,500W.
Because the washer-dryer did not have a separate condensate heat
exchanger, a water cooling system was situationally employed instead, and
the energy efficiency was found to be largely unaffected by the changes in
the flow rate. However, since the amount of water usage and drying
process time are important factors in commercial uses, optimal water flow
rate requires a further study.
By improving the insulation of dry air duct and external casing of the
washer-dryer, the energy efficiency of the entire system improved by
4.2%, which resulted from the fact that wasted heat is instead utilized in
moisture evaporation. The drying curve of the washer-dryer in the current
study was found to be compatible to a typical drying curve observed in
commercial and industrial dryers verifying similar underlying drying
mechanism. The condensation heat exchange rate due to the temperature
gradient inside and outside the tub was found to be 560W.
In this study, experiments were carried out to investigate the important
parameters influencing on the performance of a washer-dryer and analyze
the influence of the said parameters on energy efficiency, condensation
efficiency, and dryer time performance. Through parametric analysis, the
study additionally airs to understand the underlying physical mechanisms
by which a washer dryer without a condensation heat exchanger operates,
and derives a transfer function through both the parametric study and
sensitivity analysis. For consistent results, all experiments were carried out
at predetermined, constant temperature and relative humidity.
When the flow rate of incoming drying air decreased, the surface
temperature of the heater inside washer-dryer underwent a series of rapid
on-off cycle and the amount of heat carried into the inner drum structure
also diminished, which resulted in the overall lower rate of evaporation of
moisture from the clothing accompanied with longer drying process time;
consequently, the overall energy efficiency of the washer-dryer decreased.
On the other hand, when the flow rate increased, a bottleneck existed
where the drying performance was adversely affected. Due to limited
heater capacity, exiting air temperature near the heater began to decrease
after the incoming airflow exceeded a certain threshold, and the drying
efficiency declined. In the current study, the optimal air flow rate was
found to be 74 cubic meters per hour (CMH).
Further parametric study was performed by varying the heater capacity.
It was found that indefinitely increasing the heater capacity did not result
in improved washer-dryer performance, and lowering the heater capacity
below a certain level also resulted in performance deterioration due to
increased pre-heating process. The optimal heater capacity for the current
system was found to be 1,500W.
Because the washer-dryer did not have a separate condensate heat
exchanger, a water cooling system was situationally employed instead, and
the energy efficiency was found to be largely unaffected by the changes in
the flow rate. However, since the amount of water usage and drying
process time are important factors in commercial uses, optimal water flow
rate requires a further study.
By improving the insulation of dry air duct and external casing of the
washer-dryer, the energy efficiency of the entire system improved by
4.2%, which resulted from the fact that wasted heat is instead utilized in
moisture evaporation. The drying curve of the washer-dryer in the current
study was found to be compatible to a typical drying curve observed in
commercial and industrial dryers verifying similar underlying drying
mechanism. The condensation heat exchange rate due to the temperature
gradient inside and outside the tub was found to be 560W.
주제어
#건조기 세탁건조기
※ AI-Helper는 부적절한 답변을 할 수 있습니다.