Research on VVVF Variable Flow Control Geothermal Heating and Cooling System that Can Improve System COP and Reduce Noise
Year: 2024
Type: article
Abstract: Most geothermal cooling and heating systems operate with a refined degree of precision.The direct start method, a straightforward approach, repetitively starts and stops based on signals.This frequent cycling generates impact torque, affecting the motor gear and insulator due to voltage and current spikes, thereby reducing lifespan.The product developed in this study minimizes system load and noise by regulating the circulating pump output using the VVVF (Variable Voltage Variable Frequency) control method, which adjusts voltage and frequency to lower power consumption.Additionally, the output of the geothermal water circulation pump is adjusted based on the operating current of the geothermal heat pump according to demand.Although maximum load conditions are rare, oil-based circulation pumps are typically designed with a sufficient margin, often providing a flow rate greater than required.This feature helps reduce energy consumption.By applying these technologies, the COP (Coefficient of Performance) of the system can be improved, allowing cooling and heating systems to operate more efficiently and cost-effectively with variable flow control.Keywords: 지열 냉난방(Geothermal heating and cooling), 전압/속도 제어(VVVF control), 변 유량 제어(Variable flow control), COP 향상(COP improvement), 소음 저감(Noise reduction) 한국태양에너지학회 논문집
Institution: Kwangwoon University
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4402251672