Distributed Heat Pump Network for District Heating Load Balancing
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Solution Overview
Problem
Existing district heating architectures using single-source heat pumps are inefficient due to reliance on a specific environmental source, leading to reduced performance when that source is unavailable, and they lack flexibility in balancing heating and cooling loads across multiple buildings.
Innovation Solution
A distributed heat pump network where multiple individual heat pumps are connected to a common heat source, allowing for independent heat exchange and excess heat diversion, with a controller managing temperature to maintain efficiency and balance loads, and enabling integration with various energy sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If heat pumps are dedicated to a single heat source, then the heat pump system is simple in structure, but the system efficiency decreases when the environmental source is unavailable
Solution Approach 1:
The heat pump system is designed to interface with multiple types of heat sources (ground, water, air) through a common heat exchange circuit. The heat exchanger can selectively couple with different environmental sources, allowing the same heat pump infrastructure to operate with various sources depending on availability and conditions, thereby maintaining reliability without requiring completely separate dedicated systems for each source type.
2Loss of energy
If a centralized district heating plant is used, then higher efficiency and better pollution control are achieved, but the system lacks flexibility in balancing heating and cooling loads across multiple buildings
Solution Approach 1:
The district heating system is segmented into multiple independent heat pump units, each capable of operating autonomously with its own heat exchange circuit. This segmentation allows individual buildings or zones to balance their own heating and cooling loads independently while still benefiting from the overall district heating infrastructure, providing both efficiency and flexibility simultaneously.
Solution Approach 2:
The system incorporates dynamic load balancing capabilities where heat pumps can adjust their operation based on real-time heating and cooling demands. The heat exchange circuits can dynamically redirect heat flows between buildings, allowing excess heat from one building to be utilized by another, thereby maintaining high efficiency while adapting to varying load conditions across the district.
3Productivity
If heat pumps operate independently with single sources, then each heat pump can be optimized for its specific source, but network losses increase and energy sharing is not possible
Solution Approach 1:
Multiple heat pump systems are merged through a common heat exchange network that allows thermal energy sharing. The heat exchange circuits are interconnected such that excess heat from one heat pump can be transferred to another building or stored for later use, reducing network losses by utilizing heat that would otherwise be wasted while maintaining the optimization benefits of individual heat pump operations.
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 enhances energy efficiency by allowing heat sharing among heat pumps, reducing network losses, and optimizing energy use across buildings, while providing flexibility in energy sourcing and load balancing.
Implementation Method 1
Heat pumps are designed to move thermal energy opposite to the direction of spontaneous heat flow by absorbing heat from a cold space and releasing it to a warmer one
Implementation Method 2
a heat exchange array that exchanges thermal energy between the energy source and a heat exchange fluid
Implementation Method 3
A distributed heat pump network where multiple individual heat pumps are connected to a common heat source, allowing for independent heat exchange and excess heat diversion
Data Source
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AI summary
A heat pump network is described. In one aspect a distributed heat pump network used in a district heating architecture is described.