Demand Side Management Module for Utility Peak Shaving
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Solution Overview
Problem
Current energy management systems for household appliances lack effective peak demand reduction methods, particularly during peak hours, and struggle with varying communication protocols between utilities and appliances, leading to inefficiencies and increased energy costs.
Innovation Solution
A low-cost system utilizing an ambient light sensor and timer to determine peak shaving mode in appliances like refrigerators, combined with a modular Demand Side Management Module that communicates with utilities using multiple protocols, allowing for flexible energy management and load shedding strategies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a controller switches the actual energy supply to the appliance on and off during peak demand, then power consumption during peak hours is reduced, but the control system becomes more complex and lacks active control beyond simple on/off switching
Solution Approach 1:
The system pre-chills the freezer compartment before anticipated peak demand periods by lowering the temperature setpoint in advance. This preliminary cooling action stores thermal energy in the form of cold, allowing the compressor to run less during peak hours while maintaining temperature requirements. The controller receives advance notice of peak demand schedules and adjusts operations proactively rather than reactively.
Solution Approach 2:
A demand side management module acts as an intermediary between the utility company's peak demand signals and the appliance's control system. This modular component translates utility communications into appropriate control actions, providing active control beyond simple on/off switching while maintaining system modularity and ease of integration.
2Adaptability or versatility
If different communication methods and protocols are used by various utilities to signal peak demand, then the system can adapt to different utility companies, but the device complexity and integration difficulty increase
Solution Approach 1:
The demand side management module is designed with multi-functionality to handle multiple communication protocols and methods simultaneously. It can receive peak demand signals through various channels including phone lines, wireless signals, and power line communication, translating them all into unified control actions for the appliance without requiring separate specialized interfaces for each utility company.
3Reliability
If the freezer temperature is lowered below recommended levels during off-peak hours, then more energy is consumed, but the bacteria multiplication is reduced and food safety is improved
Solution Approach 1:
The system performs preliminary cooling actions before peak demand periods by lowering the temperature setpoint in advance, storing thermal energy as cold. This allows the compressor to operate less during peak hours while maintaining adequate temperature levels for food safety, rather than continuously over-cooling which would waste energy without additional safety benefit.
Solution Approach 2:
The control system continuously monitors freezer temperature and adjusts compressor operation based on feedback from temperature sensors and utility peak demand signals. This closed-loop control ensures temperature remains within safe ranges while optimizing energy consumption by avoiding unnecessary cooling when temperature requirements are already met.
Data Source
AI summary
A household appliance system comprising an appliance control system having a common appliance interface provided on an appliance and a demand side management module connected to the common appliance interface. The module corresponds to one select utility of a plurality of utilities and is configured to communicate with the one select utility of the plurality of utilities. The appliance control system operates the appliance based on communications with the one select utility through the module.