Abstract:DC power distribution in residential sector has regained interest among researchers and industrial players as new electronics-based appliances became locally available. However, the compatibility of appliances with DC distribution systems still requires much research effort. This work mainly explores on the power consumption profile of an inverter-driven Variable Speed Controller (VSC-based) refrigerator that has not yet been analyzed as one of the most important household loads. This paper compares the power … Show more
“…In the same context, the new refrigerator with a variable-speed compressor/motor is demonstrated as a block diagram shown in Figure 7 [ 55 ]. Figure 7 Block diagram of a refrigerator with a variable-speed compressor/motor.…”
Section: Proposed Configurationmentioning
confidence: 99%
“…The consumption rate rises due to the starting of the compressor running when its control tries to approach a set temperature. The power usually starts with half the maximum consumption and growing up gradually to a power rating value [ 55 ]. When the compartment temperature gets lower than a set value, the consumption gets down to its lower value, and continue fluctuating with some degradation and turned off unless no external action exists such as door opening.…”
Section: Proposed Configurationmentioning
confidence: 99%
“…In the same context, the new refrigerator with a variable-speed compressor/motor is demonstrated as a block diagram shown in Figure 7 [55].…”
DC distribution of PV systems has spread back especially in the residential sector as a variety of electronic appliances became locally available in the market. The compatibility of household appliances with the best voltage-level in a DC environment is the field that still in the research phase and has not yet made a practically extensive appearance. This paper mainly discusses this issue by providing a review of the concerning research efforts, identifying the gaps in the existing knowledge. The work explains the electrical diagrams of the recently produced appliances, classifying them to get an understanding of how each one consumes energy. It includes exploiting the recent dependence of the commercial appliances on power electronics to improve the efficiency of the existing DC distribution systems by extrapolating new architectures. The proposed topology has a DC distribution environment with two levels of voltage for all appliances. Appliances performances have been evaluated by calculating the energy transfer efficiency. The outcomes of this work can help in designing more efficient DC power distribution networks with minimal energy converters and establishing standardizations for DC microgrids.
“…In the same context, the new refrigerator with a variable-speed compressor/motor is demonstrated as a block diagram shown in Figure 7 [ 55 ]. Figure 7 Block diagram of a refrigerator with a variable-speed compressor/motor.…”
Section: Proposed Configurationmentioning
confidence: 99%
“…The consumption rate rises due to the starting of the compressor running when its control tries to approach a set temperature. The power usually starts with half the maximum consumption and growing up gradually to a power rating value [ 55 ]. When the compartment temperature gets lower than a set value, the consumption gets down to its lower value, and continue fluctuating with some degradation and turned off unless no external action exists such as door opening.…”
Section: Proposed Configurationmentioning
confidence: 99%
“…In the same context, the new refrigerator with a variable-speed compressor/motor is demonstrated as a block diagram shown in Figure 7 [55].…”
DC distribution of PV systems has spread back especially in the residential sector as a variety of electronic appliances became locally available in the market. The compatibility of household appliances with the best voltage-level in a DC environment is the field that still in the research phase and has not yet made a practically extensive appearance. This paper mainly discusses this issue by providing a review of the concerning research efforts, identifying the gaps in the existing knowledge. The work explains the electrical diagrams of the recently produced appliances, classifying them to get an understanding of how each one consumes energy. It includes exploiting the recent dependence of the commercial appliances on power electronics to improve the efficiency of the existing DC distribution systems by extrapolating new architectures. The proposed topology has a DC distribution environment with two levels of voltage for all appliances. Appliances performances have been evaluated by calculating the energy transfer efficiency. The outcomes of this work can help in designing more efficient DC power distribution networks with minimal energy converters and establishing standardizations for DC microgrids.
“…speed controller-based refrigerator outperformed in DC environment compared to the conventional AC environment. 19 The work is carried on three different scenarios, and finally the efficiency of battery load topology using DC source is proved to be better. The 48 V brushless DC electric motor (BLDC) motorbased loads for DC are incorporated with DC-DC converters.…”
The intermittent nature of photovoltaic (PV), energy conversion losses, appliance compatibility, and load dynamics pose serious challenges to PVbased DC power distribution system in residential buildings. This article proposes a holistic approach to develop a new smart residential building energy management system using internet of things (IoT)-based multifunction compatible relaying system. The proposed system monitors the loads and provides uninterruptible power supply with minimum energy conversion losses. It achieves best operating load configuration, load prioritization in various modes, and demand-side management (DSM). IoT-based multifunction compatible relaying dystem is embedded with Information and Communication Technology-enabled PZEM module, smart relays, and appliance status monitoring devices. The proposed scheme has been implemented in a DC residential building located at Madurai, Tamil Nadu, India, with 1.5 kW PV system. The results are compared in four scenarios.The experimental results prove that the losses are minimized by 18% ensuring uninterrupted power supply. The implementation of DSM further reduces the losses by 5%. The appliances can be monitored through Grafana based in home touch screen.
“…They presented that the DC refrigeration system is associated with less energy consumption and cost effectiveness. Parallel to this study, Sabry et al (Sabry and Ker 2020) studied on the electricity consumption trend of an inverter-driven variable speed controller refrigerator. They investigated different component connections as battery-inverter-load, battery-load and grid-load of the DC refrigerator and finally AC refrigerator.…”
This paper investigates the transient performance of a DC compressor fridge incorporated with Phase Change Material (PCM) for weak/off-grid setting regions. A photovoltaics (PV) module is directly connected to the DC compressor without use of batteries and inverter, in order to simplify the system and reduce its cost. The DC compressor speed can be adjusted according to the radiation intensity for an optimum match between PV output and the efficiency of refrigeration. During the daytime, the PCM is charged for cold storage by refrigeration; when solar radiation is weak or during the night, the PCM releases cooling to maintain the required cabinet temperature. A transient mathematical model is built for the whole system including PV module, DC compressor refrigeration system, fridge cabinet and PCM packs. The model is coded and solved in MATLAB while CFD method is used to produce some additional information. The simulations are conducted to evaluate the effect of solar radiation intensity, thermostat setting and the number of PCM packs on the fridge refrigeration performance. Moreover, the study aims to investigate and present benefits of incorporating PCM with a direct PV powered DC compressor fridge in weak/off-grid setting areas. When the fridge cabinet temperature varies between 4℃ and -2℃, the average COP of the fridge refrigeration system was found 1.7 for high solar radiation day due to the high rotation speed of the compressor, but for low solar radiation day, the average COP was calculated as 1.95. The analysis also shows that a variable speed DC compressor can keep the foods in the desired temperature range for two days of power outage by using 1 m 2 PV module and 3.6 kg of thin PCM packs.
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