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Dr. Daolaing LI

College of Information and Electrical Engineering, China Agricultural University, China


Talk Title
A computational fluid dynamics (CFD) approach for solar water heater to stabilize water temperature of fish tanks in Aquaponic systems

Talk Abstract

Water is the key to the aquaponics, fish can grow rapidly under the appropriate water temperature. Conversely, if the water temperature is too low and its ups and downs are large, a large number of fish will then die. However, lots of energy will be consumed in order to maintain the appropriate water temperature, particularly the factory aquaponics. It is a big challenge to popularize the factory aquaponics for minimizing energy consumption while ensuring proper aquaculture water temperature. In this work, the thermal energy of water in the aquaponics water circulation system is taken as the objective of study, the renewable technology including solar energy and air source heat pump is employed to supply the heating energy for the factory aquaponics, and a hot water storage tank links the solar collectors and delivers hot water to heat exchanger coils inside the fish tank. A computational fluid dynamics (CFD) approach is proposed to perform transient testing on channel regenerative heat exchanger.

In these analyses, circulating water temperature dependent values of aquaponics system is modeled on heat transfer from the hot water inside the helical coils under three mass flow rates are investigated. The results illustrate the temperature change along the coils is very large when the flow rate of the hot fluid through the helical coils is high. The average values of inner heat transfer energy rate could be predicted based on proposed numerical simulation approach, and we also analyzed the distribution of water velocities and temperatures inside the tank. Furthermore, this paper discusses coefficient of performance (COP) value of system.  An experimental setup is built for carrying out the heat transfer studies and verified against the experimental results.

Short Biography

Prof. Dr. Daoliang Li, is a professor and director of EU-China Center for ICT in Agriculture ( and Beijing Engineering Research center for Internet of things in Agriculture, China Agricultural University. His principal research interest is ICTs in agriculture and aquaculture, especially for information processing, smart sensors and automatic control system. He is the editor-in-chief of International Journal of Information processing in Agriculture (EI-indexed) and the Chair Work Group of Advanced Information Processing in Agriculture, International Federation for Information Processing. He also is member of Expert Committee of National rural informatization of China. He was the chairman of of 1st to 11th International conference on computer and computing technologies in agriculture ( He coordinated more than 50 international and national research projects, such as FP6, FP7, H2020 and has published more than 200 international journals (SCI/EI indexed) papers and 8 books, he also has 37 Chinese patents, and he is also the evaluation expert of FP7 and all Chinese National research projects.

Talk Keywords
Aquaponics; Computational Fluid Dynamics; Solar Heater; Water Temperature; On-site Experiment; Validation.
Target Audience
Students, Post doctoral, Industry, Doctors and professors
Speaker-intro video

The International Conference on Innovative Applied Energy (IAPE’18)