scholarly journals Experimental Validation of a Low-Energy-Consumption Heating Model for Recirculating Aquaponic Systems

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1958
Author(s):  
Anh Tuan Le ◽  
Liang Wang ◽  
Yang Wang ◽  
Ngoc Tuan Vu ◽  
Daoliang Li
Keyword(s):  
Energy Consumption ◽  
Thermal Energy ◽  
Numerical Models ◽  
Electrical Energy ◽  
Low Energy ◽  
Energetic Cost ◽  
Low Energy Consumption ◽  
The Difference ◽  
Fish Tank ◽  
Tank Water

Electrical energy is the highest energetic cost in recirculation aquaponic systems (RASs), especially for fish-tank water. Therefore, reducing energy consumption is one of the challenges in developing RAS models. In this study, eleven experimental setups, based on numerical models from an earlier investigator, were built to investigate. Among them, three additional cases (cases 9–11) investigated the transient discharging energy efficiency of thermal energy storage (TES). Cases 9–11 considered three temperature levels, namely, 65–75 °C, 71–81 °C, and 81–87 °C, with a mass flow rate of 0.166 kg/s. The results show that when heating 3.4 m3 of fish tank water from 24.5 °C to 28 °C, the average temperature error of the tank water was between 1.2% and 3.4%. The difference in the heat transfer rate was within ±4.2%. The error in the thermal efficiency was below 8.0%. The error range of the total required thermal energy was from 6.4% to 11.5%. Cases 9–11 used 5.6%, 6.4%, and 7.2% of the thermal energy of the TES tank, respectively. The electrical energy consumption was low compared to the thermal energy of the fish tank water received from the TES unit. Therefore, the proposed low-energy-consumption heating method can replace electric heaters.

scholarly journals Research on the Defrosting System of Refrigerated Containers Combining Air and Electro-Thermal Energy and the Controlling Strategy

2021 ◽  
Vol 248 ◽  
pp. 02058
Author(s):  
Kaitai Hua
Keyword(s):  
Energy Consumption ◽  
Thermal Energy ◽  
Pressure Change ◽  
High Energy ◽  
Structural Features ◽  
Low Energy ◽  
Wind Pressure ◽  
Long Duration ◽  
Low Energy Consumption ◽  
High Energy Consumption

Considering the problems such as long duration of defrosting, low working reliability and high energy consumption of refrigerated containers, this paper put forward a new defrosting method combining air and electro-thermal energy, and designed a new defrosting structure system based on the structural features of refrigeration modules of refrigerated containers. The two-variable method of wind pressure change and temperature difference change on both sides of the evaporator was used to detect frosting, and the specific controlling strategy supporting the new defrosting system was provided to realize the effect of intelligent defrosting. It can provide references for fast defrosting, intelligent defrosting and low energy consumption defrosting of refrigerated containers.

A Study on the Use of Bipolar-Particles-Electrodes in Decolorization of Dyeing Effluents and Its Principle

1987 ◽  
Vol 19 (3-4) ◽  
pp. 391-400 ◽  
Author(s):  
Zhou Ding ◽  
Cai Wei Min ◽  
Wang Qun Hui
Keyword(s):  
Energy Consumption ◽  
High Efficiency ◽  
Low Energy ◽  
Acid Dyes ◽  
Underlying Principle ◽  
Low Energy Consumption ◽  
Transparent Liquid

This paper studies the use of bipolar-particles-electrodes in the decolorization of dyeing effluents. Treatment of highly colored solutions of various soluble dyes (such as direct, reactive, cationic or acid dyes) and also samples of dyeing effluents gave rise to an almost colorless transparent liquid, with removal of CODcr and BOD5 being as high as over 80%. The method is characterized by its high efficiency, low energy consumption and long performance life. A discussion of the underlying principle is given.

scholarly journals A Long-Distance Communication Architecture for Medical Devices Based on LoRaWAN Protocol

Electronics ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 940
Author(s):  
Nicoleta Cristina Gaitan
Keyword(s):  
Energy Consumption ◽  
Long Range ◽  
Medical Devices ◽  
Low Energy ◽  
Area Network ◽  
Wide Area Network ◽  
Long Distance ◽  
Communication Architecture ◽  
Low Energy Consumption ◽  
Distance Communication

Recent market studies show that the market for remote monitoring devices of different medical parameters will grow exponentially. Globally, more than 4 million individuals will be monitored remotely from the perspective of different health parameters by 2023. Of particular importance is the way of remote transmission of the information acquired from the medical sensors. At this time, there are several methods such as Bluetooth, WI-FI, or other wireless communication interfaces. Recently, the communication based on LoRa (Long Range) technology has had an explosive development that allows the transmission of information over long distances with low energy consumption. The implementation of the IoT (Internet of Things) applications using LoRa devices based on open Long Range Wide-Area Network (LoRaWAN) protocol for long distances with low energy consumption can also be used in the medical field. Therefore, in this paper, we proposed and developed a long-distance communication architecture for medical devices based on the LoRaWAN protocol that allows data communications over a distance of more than 10 km.

Absorbent cotton derived mesoporous CeO2 hollow tubule for enhanced detection of p-xylene at low energy consumption

2021 ◽  
pp. 159774
Author(s):  
Jing-Shuo Liu ◽  
Bao-Yu Song ◽  
Jing Huang ◽  
Zhao-Peng Deng ◽  
Xian-Fa Zhang ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Low Energy ◽  
Absorbent Cotton ◽  
Low Energy Consumption ◽  
Mesoporous Ceo2
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