Solar Board Valve Switching for Hybrid Water Heater Load Matching
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Solution Overview
Problem
Conventional systems struggle to efficiently match locally generated electricity with building energy demands, leading to surplus electricity being sold back to the municipal grid at a lower price and deficit electricity being purchased at a higher price, especially during surge times, making it difficult to optimize energy usage and reduce reliance on fossil fuels.
Innovation Solution
A solar board system that includes manifolds and valves to dynamically switch between electric and natural gas water heaters based on energy availability and pricing, using machine learning for optimal energy usage, allowing for efficient use of locally generated electricity and reducing reliance on fossil fuels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional systems purchase electricity from municipal grid during deficit times, then building energy demands are met, but energy costs increase due to surge pricing
Solution Approach 1:
The system dynamically switches between different energy sources (solar panels, electric water heater, natural gas water heater) based on real-time conditions including electricity pricing, solar availability, and energy demands. This dynamic adaptation allows the system to avoid surge pricing by using stored solar energy or alternative sources during high-cost periods while maintaining reliable hot water supply.
Solution Approach 2:
The system changes operational parameters by adjusting which energy source is active based on varying conditions. When municipal electricity pricing increases or solar generation decreases, the system transitions from electric heating to natural gas heating, effectively changing the energy source parameter to optimize both cost and reliability.
2Loss of energy
If conventional systems sell surplus electricity back to municipal grid, then excess energy is utilized, but revenue is lower than purchase price
Solution Approach 1:
The system serves itself by using stored solar energy to meet building demands during deficit periods rather than purchasing from the grid. This self-consumption of generated energy eliminates the need to sell back at low prices, effectively retaining the energy value within the system and avoiding the revenue loss associated with net metering disparities.
Solution Approach 2:
The system performs preliminary action by storing energy in the form of heated water in tanks during periods of high solar generation. This pre-heated stored energy is then utilized during periods of high electricity demand or low solar generation, allowing the system to avoid purchasing expensive grid electricity and effectively self-manage the energy surplus without selling back to the grid.
3Productivity
If solar board system uses multiple energy sources and dynamic switching, then energy optimization is improved, but system complexity increases
Solution Approach 1:
The system achieves multi-functionality by integrating solar panels, electric water heater, natural gas water heater, and storage tanks into a single hybrid system. This universal system can operate in multiple modes (solar-only, electric supplementation, natural gas backup, stored energy discharge) depending on conditions, providing energy optimization across diverse scenarios without requiring separate independent systems.
Solution Approach 2:
The control system acts as an intermediary that manages the complexity of coordinating multiple energy sources. It receives inputs from sensors monitoring solar generation, grid pricing, and energy demands, then automatically switches between energy sources and manages storage tank operations. This intermediary control layer simplifies the user interface while enabling sophisticated optimization of the multi-source system.
4Object-generated harmful factors
If system uses stored energy from solar panels, then reliance on fossil fuels is reduced, but energy availability becomes dependent on weather conditions
Solution Approach 1:
The system provides beforehand cushioning by maintaining stored hot water in tanks as a buffer against variability in solar generation. This stored energy acts as a cushion that can be drawn upon during periods of low solar availability (cloudy weather, nighttime), ensuring continuous hot water supply and compensating for the intermittent nature of solar energy before reliability issues arise.
Solution Approach 2:
The system changes the energy source parameter dynamically based on weather conditions and grid conditions. When solar generation is sufficient, it uses solar energy to minimize fossil fuel use. When solar generation is insufficient due to weather, it transitions to electric or natural gas sources, effectively changing the energy mix parameter to maintain reliability while minimizing fossil fuel reliance during periods when renewable energy is available.
Data Source
AI summary
A method includes, responsive to first input, actuating a first plurality of valves of a solar board to be in an open position to provide cold water via a first manifold mounted to the solar board to first equipment and to receive hot water from the first equipment. The method further includes, responsive to second input, actuating a second plurality of valves of the solar board to be in the open position to provide the cold water via the first manifold and a second manifold mounted to the solar board to second equipment and to receive the hot water from the second equipment.