Climate Control System on DC Microgrid Using Stepped Demand Response
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Climate control systems powered by renewable energy microgrids face challenges due to inconsistent power generation, inefficiencies in converting DC to AC, and high costs of complex backup systems, leading to potential damage and increased operating costs.
Innovation Solution
A climate control system with a controller that adjusts operating parameters in response to voltage fluctuations using stepped demand responses and direct DC power, optimizing energy use and reducing strain on components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If renewable energy sources (solar panels, wind turbines) are used to power the climate control system, then environmental sustainability is improved, but power generation consistency deteriorates due to weather dependence and component failures
Solution Approach 1:
The system dynamically adjusts operating parameters based on real-time voltage indications from the microgrid. The controller continuously monitors voltage levels and modifies compressor speed, fan operation, and refrigerant flow to match the fluctuating renewable power supply, allowing the system to adapt to changing weather conditions and maintain reliable operation
Solution Approach 2:
The patent implements stepped demand responses that change system operating parameters in discrete steps based on voltage thresholds. When voltage drops below certain levels, the system steps down compressor capacity, adjusts fan speeds, and modifies refrigerant expansion valve positions to match available power while maintaining climate control functionality
2Adaptability or versatility
If DC to AC conversion is implemented to power existing climate control systems, then compatibility with standard equipment is improved, but energy efficiency deteriorates due to conversion losses
Solution Approach 1:
The patent extracts and eliminates the DC-to-AC inverter component from the power conversion chain. By designing the climate control system to operate directly on DC power from solar panels and battery storage, the system removes the inefficient conversion step while maintaining compatibility with DC-powered components like LED lighting and electronic controls
Solution Approach 2:
The system replaces the mechanical/electrical DC-AC conversion mechanism with direct DC operation. DC-compatible compressors, motors, and control electronics are used throughout the system, substituting the need for inverters and associated energy losses with efficient direct current operation
3Reliability
If automated backup power generators are added to ensure continuous operation, then system reliability is improved, but device complexity and operating costs deteriorate
Solution Approach 1:
The system uses intelligent control algorithms that automatically monitor microgrid voltage levels and self-adjust operating parameters without external intervention. The controller independently determines when to step down capacity, switch between power sources, or activate demand response modes, eliminating the need for complex automated backup generator systems
Solution Approach 2:
Rather than providing 100% backup capacity through generators, the system uses battery storage to provide partial backup during minor fluctuations and accepts temporary capacity reductions during severe weather events. This partial action approach maintains reliability for critical functions while avoiding the complexity and cost of full backup generator systems
4Ease of operation
If the climate control system operates at full capacity continuously, then comfort level is improved, but energy consumption deteriorates during periods of insufficient renewable power
Solution Approach 1:
The controller continuously receives feedback from voltage sensors monitoring the microgrid's power availability and adjusts system capacity in real-time. When voltage indicates sufficient renewable power, the system operates at full capacity for optimal comfort. When voltage drops, the controller receives feedback and automatically steps down capacity to match available power, maintaining comfort within acceptable ranges while preventing energy deficits
Data Source
AI summary
Examples of the present disclosure relate to systems and methods for operating a climate control system on a microgrid utilizing renewable sources of power including solar panels and wind turbines. In general, this disclosure focuses on utilizing a range of stepped or discrete demand responses for the climate control system to adjust power consumption levels in response to variable levels of power input associated with renewable power sources attached to the microgrid. These stepped or discrete demand responses of the climate control system may allow the microgrid to react to linear, continuous, or non-discrete fluctuations in the input power while reducing the likelihood of damage to the climate control system. Some examples may also allow the climate control system to more consistently maintain comfort settings of conditioned spaces. Some examples utilize a direct current (DC) microgrid and climate control system.