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Solar Energy Equipment Restructuring and Potential Applications in Greenhouse Aquaculture Heating

Author: LiYun
Tutor: WangZhiZuo
School: Zhejiang Ocean University,
Course: Cultivation
Keywords: solar energy using collector collector efficiency PID control constanttemperature syste
CLC: S969.33
Type: Master's thesis
Year: 2014
Downloads: 8
Quote: 0
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Abstract


Solar energy as a kind of clean and abundant reproducible energy source, has agreat prospect. In order to reduce using of Heating Coal-fired Boiler in greenhousecultivation of Aquaculture farms, we have researched an improved heating system ofsolar energy collection and redesigned Automatic Monitoring and Controlling systemof water temperature in culture pond. After Comparing with usual collector, we finallychoose to use heat pipe solar collector. We have done theoretical analysis andperformance test, including instantaneous efficiency、average daily efficiency、heatloss coefficient. The result shows the instantaneous efficiency of heat pipe solar isaround37%. The unidirectional thermal conductivity has saved much more heat lossthrough the collector. The best way to do thermal storage is buried underground. Aftercomparing the thermal performance of usual using materials, using FLUENT6.3todo simulation analysis of heat dissipation for the underground water tank, we foundits heat storage capacity is depends on materials thermal conductivity、thickness andenvironment temperature.To control the temperature of Aquaculture farms cultivation, the AutomaticMonitoring and Controlling system uses Siemens S7-200PLC as the cybernetics core,using intelligent temperature module to do signal acquisition and processing ofculture pond and thermal storage tank. The system makes storage tank priority using,if not enough then the coal-fired boiler will work, combined with PID algorithm tomake seedlings pond automatic constant temperature. Temperature control systemdebugging results shows it has fast dynamic response、low overshoot、small staticerror, which can satisfy the requires of temperature control in seedlings pond.

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CLC: > Agricultural Sciences > Aquaculture, fisheries > Aquaculture technology > Aquaculture equipment > Feeding equipment > Thermostat, dimming device
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