Is This Energy Project a Good Idea? Part 1
Farmers often face the pressure to adopt the latest technology. New ideas are coming out all the time with ways to improve farms. But which ones are good ideas, and which ones are good ideas that are worth considering for your farm?
While more sustainable agricultural practices are increasingly promoted, they must also be economically viable for farmers. Anaerobic digestion, for instance, is an emerging technology for processing organic matter on farms. Before deciding to implement this or any other technology, farmers need to consider several practical, economic factors: What is the required investment for the digester equipment? What are the ongoing operating costs for this device? What are the inputs and outputs, and how will they be managed? Ultimately, does the economics of the technology make it a genuinely sustainable option for the farm? One of the best ways to analyze a potential project on the farm is a method called Techno Economic Analysis (TEA).
Introduction to Techno-Economic Analysis (TEA)
Researchers attempt to answer questions about new projects with the help of Techno-Economic Analysis (TEA). This is a method that evaluates the technical and economic performance of an emerging technology. In short, TEA is designed to answer two critical questions:
- How much material does the new technology use and produce?
- How much energy does the new technology use and produce?
- How much money does it use or produce?
TEA offers information to help navigate the often-competing goals of maximizing profits, minimizing cost, addressing market drivers, and meeting environmental constraints. Because of this, TEA can provide a cost/benefit analysis for new technology.
How is a TEA Performed?
To perform a TEA, researchers gather comprehensive technical and economic data to evaluate the feasibility of a technology or process. They begin by collecting technical information, including detailed process designs, equipment specifications, and operational parameters. These data are obtained from engineering documents, technical literature, and consultations with experts. They also assess inputs and outputs, such as raw materials, energy requirements, and product yields. A process flow diagram is then constructed to visualize the agricultural process, illustrating the sequence of operations and the movement of materials through the system, such as the one shown in Figure 1. Understanding these technical details helps in designing efficient and effective systems tailored to specific agricultural needs.
Once the material and energy flows are figured out for a new technology, it is then time to analyze the economics. Researchers analyze both capital expenditures (CAPEX) and operating expenditures (OPEX). CAPEX covers the initial investment costs for equipment and infrastructure, while OPEX includes ongoing costs like raw materials, utilities, labor, and maintenance. These financial data are gathered from vendor quotes, financial records, and market research. Additionally, researchers evaluate potential revenue streams, market demand, and regulatory impacts to provide a holistic view of the technology’s economic viability. By combining these insights with risk and sensitivity analyses, researchers can offer farmers a clear picture of the potential benefits and challenges of adopting new technologies, ensuring they are both sustainable and economically feasible.
| Component | CAPEX (Cost to Purchase and Install) | OPEX (Annual Cost to Operate and Maintain) |
|---|---|---|
| Mixing Tank | $90,000 | $4,000 |
| Digester Tank | $1,100,000 | $50,000 |
| Separator | $120,000 | $6,000 |
| Generator | $350,000 | $16,000 |
| Misc. Pipes and Wiring | $140,000 | $7,000 |
| Total | $1,800,000 | $83,000 |
| Grant Money | 25% | |
| Electricity Price | $0.09/kWh | |
| Bedding Value | $20 per ton |
The final output of a TechnoEconomic Analysis is a list of the inputs and outputs, along with an economic performance indicator. Some of the more common economic performance indicators include:
- Payback (PB) – number of years that it will take for the investment cost to be recouped by the farmer.
- Internal Rate of Return (IRR) – the percentage interest you’d have to receive from a savings account in order to get the same benefit as carrying out the project.
- NPV (NPV) – the amount of money that the project is worth to you, in today’s dollars.
Each economic performance indicator shows a different aspect of the project’s performance, so it is sometimes good to look at multiple indicators to decide if the project is worthwhile or not.
| Item Description | Annual Amount |
|---|---|
| Inputs | 8,000,000 gallons manure |
| Outputs | 750,000 kWh electricity 1,600 tons bedding |
| Annual Income | $168,000 |
| Project IRR (Internal Rate of Return) | 8.3% |
How can Farmers use TEA work?
When these components are combined, a TEA offers a better understanding of the true benefits and potential challenges of new technology.
It is important to note that the results of a TEA are only estimates, and the actual performance of a project could be very different than expected. One way to estimate variability in a project's performance is to conduct a "sensitivity analysis" that shows how unexpected variations of important factors could affect the project. For example, the “tornado diagram” shows the effect of higher and lower values of different inputs on an anaerobic digester project’s performance.
In Figure Two, the analysis shows that, for this example farm, the expected rate of return for the project is 8%. Variations in the electricity selling price will have the largest effect on the profitability of the digester. Variations in construction cost or fertilizer have a much smaller impact. By determining the most influential variables, this analysis helps farmers understand which parts of the system are most important to keep efficient, allowing them to focus their efforts on areas that will maximize economic returns.
Conducting a TEA allows farmers to make well-informed decisions about implementation. The detailed financial insights can help farmers save money and estimate returns on investment. Additionally, by identifying potential risks, a TEA can help minimize revenue loss by helping farmers see which factors should be more carefully watched and controlled. Adopting technologies with the guidance of a TEA enables farmers to stay ahead of industry trends and enhance their market competitiveness.
Farmers can obtain techno-economic analysis (TEA) work for their farms by engaging with agricultural extension services, consultants, or research institutions, and by leveraging government programs that support sustainable practices. They can also utilize industry resources, specialized software tools, and attend workshops or training sessions to gain the necessary skills and knowledge. Collaborating with technical experts and other farmers who have undergone similar analyses can provide valuable insights and practical guidance.
In agriculture, the demand for optimization can make the newest systems particularly appealing. However, it's crucial to thoroughly understand how new technology functions before integrating it into existing operations.TEA is not the only tool needed to ensure new technology is optimal for an agricultural system. It does not provide any insights on environmental impacts or end-of-life disposition. It can also be difficult to obtain the appropriate information to perform a successful TEA. However, when executed well, a TEA can truly empower farmers with critical financial and operational insights, helping them to make informed decisions, optimize their investments, and enhance the overall performance of their farming operations.
