PTO Coupling Station for Farm Heat and Power Generation
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Solution Overview
Problem
Small and medium farms lack the resources to create an autonomous system for producing both electricity and heat, relying on external purchases for energy due to the high costs and complexity of advanced biogas generation systems.
Innovation Solution
Equipping agricultural vehicles with a coupling station that includes an electric generator connected to the vehicle's PTO and a heat recovery circuit, allowing the vehicle to generate electricity and heat, with optional energy storage and scheduling for continuous farm power and heating needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If advanced biogas generation systems are implemented, then electricity and heat production capability is improved, but device complexity and initial investment cost increase significantly
Solution Approach 1:
The agricultural vehicle's internal combustion engine is made multi-functional by enabling it to perform both its traditional dynamic function (powering the vehicle for field operations) and a new static function (powering an electric generator to produce electricity and heat for the farm). The engine serves dual purposes: mobile agricultural work and stationary energy generation, eliminating the need for separate dedicated biogas plants.
Solution Approach 2:
The farm uses its own existing agricultural vehicle and engine to generate its own electricity and heat needs. The system is self-sufficient, utilizing resources already present on the farm (the agricultural vehicle) to meet energy requirements, rather than relying on external energy purchases or complex external infrastructure.
2Productivity
If agricultural vehicles are used continuously for both dynamic tasks and stationary energy generation, then energy production efficiency is improved, but vehicle availability for dynamic tasks may be reduced
Solution Approach 1:
The system dynamically adapts the vehicle's function based on operational needs. The agricultural vehicle can switch between dynamic mode (field operations) and static mode (energy generation) as required. The coupling station enables flexible transition between these states, allowing the vehicle to be used for energy production during periods when dynamic tasks are minimal while maintaining full availability for field operations when needed.
Solution Approach 2:
The vehicle alternates between periodic dynamic tasks (field operations) and periodic static energy generation. During seasons or periods when agricultural field work is reduced, the vehicle is deployed for stationary energy production. This periodic switching optimizes overall productivity by matching vehicle usage to seasonal and operational demands.
3Loss of energy
If heat recovery circuits are added to the agricultural vehicle, then energy efficiency is improved, but device complexity increases
Solution Approach 1:
The system recovers waste heat energy from the agricultural vehicle's exhaust gases and cooling circuit that would otherwise be discarded. The heat recovery circuit captures this thermal energy and redirects it to meet the farm's heating needs, converting what was previously wasted energy into useful heat, thereby improving overall energy efficiency.
Solution Approach 2:
The exhaust gases and hot cooling water, which represent energy loss and potential environmental pollution, are converted into beneficial heating resources. The heat recovery system transforms harmful waste heat into useful thermal energy for farm buildings, turning a negative aspect into a positive contribution to energy efficiency.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables small and medium farms to produce their own electricity and heat, optimizing the use of agricultural vehicles for both dynamic tasks and stationary energy generation, reducing reliance on external energy sources and enhancing energy efficiency.
Implementation Method 1
an electric generator and an electric generator input shaft configured to be connected to the rear PTO of the agricultural vehicle
Implementation Method 2
the coupling station also includes a heat recovery circuit from the exhaust gases produced by the internal combustion engine of the agricultural vehicle
Implementation Method 3
the agricultural vehicle comprises a liquid/liquid heat exchanger, having a first circulation branch operatively connected to the refrigeration circuit of the internal combustion engine of the agricultural vehicle and equipped with a second circulation branch that can be connected to a liquid circuit outside of the vehicle to supply heat to the farm
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
Integrated electric power generation system comprising a fixed coupling station (CST) and an agricultural vehicle (VHE) equipped with an internal combustion engine (E), the station comprising an electric generator (G) having a rotor operatively connected to a propeller shaft (SH) equipped with a flange, so that the flange can be connected to a PTO of the agricultural vehicle (VHE) to drive said rotor of the electric generator into rotation.