Heat Pump Power Control for Stable Surplus Solar Utilization
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Solution Overview
Problem
Conventional heat pump hot water supply systems generate reverse power when photovoltaic power generation falls below consumption, leading to power grid instability and increased energy costs due to inefficient operation and waste of surplus power.
Innovation Solution
A heat pump operation method that adjusts power consumption based on surplus power availability, ensuring the heat pump operates efficiently only when surplus power is stable and sufficient, using a control system to manage power consumption in real-time and optimize energy usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the heat pump operates using photovoltaic power when surplus power is available, then energy costs are reduced and renewable energy utilization is improved, but reverse power is generated when photovoltaic power exceeds consumption, causing power grid instability
Solution Approach 1:
The heat pump's power consumption is dynamically adjusted based on real-time surplus power availability. The operation control unit continuously monitors surplus power and modifies the heat pump's power consumption accordingly, allowing the system to adapt to changing photovoltaic generation conditions and prevent reverse power while maximizing renewable energy utilization.
Solution Approach 2:
The system implements a feedback mechanism where the operation control unit receives information about surplus power from the power generation device and adjusts the heat pump's operation in response. This closed-loop control ensures that the heat pump consumes power in alignment with available surplus power, preventing both reverse power and underutilization of renewable energy.
2Productivity
If the heat pump operates at high power consumption to meet hot water demand, then productivity is improved, but reverse power is generated causing power grid instability
Solution Approach 1:
The heat pump's power consumption is dynamically adjusted based on real-time surplus power availability. The operation control unit continuously monitors surplus power and modifies the heat pump's power consumption accordingly, allowing the system to adapt to changing photovoltaic generation conditions and prevent reverse power while maximizing renewable energy utilization.
3Loss of energy
If the heat pump operates using surplus power, then loss of energy is reduced, but the system complexity increases due to additional control mechanisms
Solution Approach 1:
The operation control unit serves multiple functions: it monitors surplus power from the power generation device, controls the heat pump's power consumption, and prevents reverse power. By consolidating these functions into a single control unit, the system minimizes additional complexity while achieving effective energy management.
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
This approach stabilizes the power grid by reducing reverse power flow and lowers energy costs by utilizing surplus power effectively, while maintaining efficient heat pump operation.
Implementation Method 1
A photovoltaic device generates power by transforming solar energy into electricity
Implementation Method 2
A heat pump hot water supply device heats a refrigerant by absorbing heat from the atmosphere and compressing the refrigerant using electricity
Implementation Method 3
A heat pump hot water supply device heats a refrigerant by absorbing heat from the atmosphere
Implementation Method 4
The heat is then transferred to the water via a heat exchanger, creating hot water
Data Source
AI summary
A heat pump operation method includes: obtaining, on a per time unit basis, generated power which is an amount of power generated by a power generation device, load power which is an amount of power consumed by an electric load, and surplus power which is a difference between the generated power and the load power; and controlling operation of the heat pump, wherein in the controlling, an amount of power consumed by the heat pump for generating heat is adjusted to follow a per unit time increase or decrease in the surplus power when a first condition is met, the first condition being that the surplus power remains greater than or equal to a predetermined threshold value for a given period of time extending back from the present time.