Click on “Download PDF” for the PDF version or on the title for the HTML version.

If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options.

Solar Trigeneration System to Achieve Net-zero Energy Greenhouse in Mediterranean Regions

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  2022 ASABE Annual International Meeting  2200165.(doi:10.13031/aim.202200165)
Authors:   T. M. Abir Ahsan, Md Shamim Ahamed
Keywords:   Adsorption cooling system, greenhouse energy loads, net-zero energy greenhouse, solar PVT collector, trigeneration.

Abstract. Controlled environment agriculture (CEA) has already shown promising potential for efficient agricultural land-water usage and quality products with high yield. However, energy use for maintaining optimal climatic conditions for plants remains a significant challenge for this industry, often consuming up to 85% of net operational energy. Energy costs can contribute up to 20-40% of the net operating cost depending on CEA facilities and plants grown, which is a significant obstacle to achieving economic and environmental sustainability. It is also worth mentioning that the current technologies for space heating-cooling in CEA facilities are carbon-intensive. Integrating renewable energy will help reduce the environmental impact of this energy-intensive agricultural industry. Applying solar-assisted heating-cooling systems in CEA can offset carbon emissions and truncate the periodic operational cost. Adsorption air conditioning system is a unique technology that goes well with solar because of their comparatively lower operating temperature (as low as 50 °C). It has already shown good prospects in building space conditioning. This study runs a numerical investigation on the feasibility of applying a photovoltaic thermal (PVT) and adsorption chiller combination to satisfy the heating-cooling-power (trigeneration) demand of a commercial-scale greenhouse in California. The system has been designed based on a two-bed silica-gel water adsorption system and a flat plate PVT solar collector. The MATLAB software has been used to simulate the system's overall performance. Results obtained from this investigation can be a step toward materializing the net-zero-energy greenhouse concept.

(Download PDF)    (Export to EndNotes)