Hybrid Heat Pump Integration for Solar-Geothermal Tempering
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Solution Overview
Problem
Existing hybrid heating and cooling systems that combine solar and geothermal energy often operate independently, leading to inefficiencies and a reliance on fossil fuels, as they do not maximize the use of available energy sources.
Innovation Solution
A hybrid heating and cooling system that integrates heat pumps, heat exchanger systems, and solar/waste energy systems, allowing for the combination and efficient use of solar and geothermal energy sources by tempering working fluids and providing direct heating, thereby optimizing the operation of heat pumps and reducing the need for fossil fuels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If solar and geothermal systems operate independently, then each system can function with simple control logic, but the overall energy efficiency is not maximized and fossil fuel reliance increases
Solution Approach 1:
The patent combines solar thermal collection and geothermal heat exchange systems into a single integrated hybrid system. The solar collectors and geothermal heat exchangers share common hydraulic circuits, pumps, and control mechanisms, allowing the systems to work together rather than independently. This merging enables the system to maximize energy efficiency by utilizing whichever heat source is most effective at any given time, while reducing the need for fossil fuel supplementation.
2Reliability
If the system uses multiple energy sources (solar, geothermal, fossil fuels), then energy supply reliability is improved, but the complexity of managing and coordinating these sources increases
Solution Approach 1:
The hybrid system incorporates control mechanisms that continuously monitor temperature, flow rates, and heat exchange efficiency across both solar and geothermal components. Based on this feedback, the system automatically adjusts pump speeds, valve positions, and heat exchanger configurations to optimize performance. This feedback-driven control simplifies operation by eliminating the need for manual coordination of multiple energy sources while maintaining high reliability through adaptive response to changing conditions.
3Use of energy by moving object
If heat pumps operate at lower temperatures, then energy consumption is reduced, but the heating capacity and effectiveness decrease
Solution Approach 1:
The system uses solar thermal collectors and geothermal heat exchangers to preheat or precool the fluid before it enters the heat pump. This preliminary thermal conditioning reduces the temperature differential the heat pump must overcome, allowing it to operate at lower energy consumption levels while maintaining effective heating capacity. The solar and geothermal systems prepare the thermal state of the working fluid in advance, so the heat pump operates more efficiently without sacrificing heating power.
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
The system achieves high energy efficiency, with 55% of energy from heat exchangers, 25% from solar, 11% from electrical work, and 9% from peaking boilers, while reducing fossil fuel usage by 91% and CO2 emissions by 68%, operating the heat pump at a Coefficient of Performance (COP) between 7 and 8.
Implementation Method 1
a heat pump having a source side and a load side. The heat pump is configured to move heat between the source side and the load side
Implementation Method 2
a heat exchanger configured to receive the working fluid from the ground and transfer heat from the working fluid to the source side of the heat pump
Implementation Method 3
A solar or waste energy system is configured to heat a working fluid
Implementation Method 4
A solar or waste energy system is configured to heat a working fluid
Data Source
AI summary
A hybrid heating and/or cooling system may combine different energy sources (e.g., solar and geothermal) into a single system. The hybrid heating and/or cooling system may include one or more heat pumps, a heat exchanger system, a solar and/or waste energy system, and a delivery system for delivering heat (and/or cool air) to a space such as a building. These systems may be interconnected and controlled using various conduits, pumps, valves and controls. The solar energy system may provide heat (e.g., low grade heat) to the working fluid at the input to the source side of the heat pump and/or may provide heat (e.g., high grade heat) to the delivery system for direct solar and/or waste energy heating.