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Performance Analysis of Solar Powered Integrated Greenhouses Using Semitransparent Organic Solar Cells.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Performance Analysis of Solar Powered Integrated Greenhouses Using Semitransparent Organic Solar Cells./
作者:	Ravishankar, Eshwar.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
面頁冊數:	261 p.
附註:	Source: Dissertations Abstracts International, Volume: 83-05, Section: B.
Contained By:	Dissertations Abstracts International83-05B.
標題:	Greenhouses. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28747795
ISBN:	9798494444110

Performance Analysis of Solar Powered Integrated Greenhouses Using Semitransparent Organic Solar Cells.
Ravishankar, Eshwar.

Performance Analysis of Solar Powered Integrated Greenhouses Using Semitransparent Organic Solar Cells. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 261 p.

Source: Dissertations Abstracts International, Volume: 83-05, Section: B.

Thesis (Ph.D.)--North Carolina State University, 2021.

This item must not be sold to any third party vendors.

Greenhouses vastly increase agricultural land-use efficiency. However, they also consume significantly more energy than conventional farming due in part to conditioning the greenhouse space. One way to mitigate the increase in energy consumption is to integrate solar modules onto the greenhouse structure. Semitransparent organic solar cells (ST-OSCs) are particularly attractive given that their spectral absorption can be tuned to minimize the attenuation of sunlight over the plants photosynthetically active spectrum. Adding ST-OSCs to a greenhouse structure enables simultaneous plant cultivation and electricity generation thereby reducing the greenhouse energy demand. However, the extent of greenhouse energy demand that can be offset by ST-OSCs, impact on plant growth and a method to analyze trade-off between plant growth and power generation is missing. First, the benefits of integrating OSCs on the net energy demand of greenhouses within the U.S. are determined through a detailed energy balance model. We find that these systems can have an annual surplus of energy in warm and moderate climates. Furthermore, we show that sunlight reduction entering the greenhouse can be minimized with appropriate design.Given ST-OSCs are suited to achieve energy neutral greenhouses in warm and moderate climates, the next phase involved establishing the impact of such systems on plant growth and indoor climate and to optimize system tradeoffs. Here, we consider plant growth under OSCs and system relevant design. Red leaf lettuce was grown under ST-OSC filters with three different OSC active layers that have unique transmittance. The comparison found no significant differences in the fresh weight and chlorophyll content of the lettuce grown under these OSC filters. In addition, OSCs provide an opportunity for further light and thermal management of the greenhouse through device design and optical coatings. The OSCs can thus impact plant growth, power generation, and thermal load of the greenhouse, and this design trade-space is reviewed and exemplified.Previous modelling and experimental studies have focused either on greenhouse energy or plant growth without understanding the trade-offs between both. Similarly, a provision to tune ST-OSC system performance for the growth of low and high light requiring crops has been absent. Here, a plant growth model is integrated with a greenhouse energy model to predict growth of a low light (lettuce) and high light (tomato) requiring plant as a function of greenhouse environmental control. Supplemental lighting is considered for optimal tomato fruit yield and the energy costs are included with the already considered heating and cooling demand. 64 different organic solar cell systems made up of different active layer blends' with absorption edges varying from 700-1100 nm and corresponding changes in device transmittance and power conversion efficiency are considered. Greenhouse operation is modelled considering 25 global climates to determine overall Net Present Value (NPV) as a function of annual energy offset and crop yield. This is further extended to create a global economic feasibility map to highlight potential for ST-OSC integrated greenhouse. We also demonstrate the model's ability to analyze energy-plant yield tradeoffs and identify optimal ST-OSC systems based on climate and crop selection. Over the entire process, we demonstrate significant improvement in NPV in comparison to a reference greenhouse. This is in the order of $8000 for lettuce and $20000 for tomato production thereby indicating potential to double the available global land area for food production.

ISBN: 9798494444110Subjects--Topical Terms:

1530611
Greenhouses.

Performance Analysis of Solar Powered Integrated Greenhouses Using Semitransparent Organic Solar Cells.
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