Dual-Source Hydraulic Heating Layout for Lower Heat Loss
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Solution Overview
Problem
Existing solar heating and domestic hot water production systems face inefficiencies due to heat losses, limited storage temperature, and complex energy metering, which hinder energy savings and return on investment.
Innovation Solution
A combined installation with a hydraulic circuit that allows solar energy to directly heat zones without passing through the backup source, and the backup source to supply heat without going through the storage tank, using a single flow meter and temperature sensors for energy metering, with a three-way distribution valve connecting all elementary and auxiliary circuits on the same side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If solar energy passes through the backup source boiler, then the system can provide heating, but heat losses occur and efficiency is reduced
Solution Approach 1:
The hydraulic circuit is segmented into separate paths: one for solar energy direct to heating zones, and another for backup source. The distribution valve separates these paths, allowing solar energy to bypass the backup source boiler entirely, eliminating heat losses while maintaining operational flexibility.
Solution Approach 2:
The distribution valve acts as an intermediary that directs heat transfer fluid flow. It mediates between the solar energy system and heating zones, enabling direct connection without passing through the backup source, thus preventing heat losses while maintaining system control.
2Loss of energy
If storage temperature is limited by backup source maximum temperature, then the backup source can operate within safe limits, but stored energy and energy saving are reduced
Solution Approach 1:
The storage tank is segmented into functionally independent heating zones with separate temperature controls. Each zone can be heated to different temperatures based on its specific requirements, allowing the solar system to heat to higher temperatures without being constrained by the backup source's maximum temperature rating.
Solution Approach 2:
Different zones of the storage tank have different temperature characteristics optimized for their specific purposes. The solar heating zone can achieve higher temperatures for direct heating applications, while the backup source zone maintains temperatures suitable for its operational constraints.
3Loss of energy
If backup source energy passes through the storage tank before heating zones, then the system can provide heating, but energy efficiency is reduced
Solution Approach 1:
The hydraulic circuit is segmented to provide direct pathways: the backup source connects directly to heating zones through its own dedicated circuit, separate from the storage tank. This segmentation allows the backup source to operate efficiently without unnecessary heat transfer through the tank, reducing energy losses while maintaining system operational flexibility.
4Adaptability or versatility
If multiple three-way circulation valves are used for solar and backup control, then heating zones can be directed to different sources, but device complexity increases
Solution Approach 1:
Multiple control functions are merged into a single distribution valve. This valve simultaneously controls the direction of heat transfer fluid for both solar energy and backup source operations, consolidating what would otherwise require multiple separate three-way valves. The merging reduces device complexity while maintaining the ability to direct heating zones to different energy sources.
Solution Approach 2:
The distribution valve is designed with multi-functionality, serving as a universal control point for both solar and backup source hydraulic circuits. It can direct flow to different destinations based on operational requirements, replacing the need for multiple specialized valves and simplifying the overall system architecture.
5Ease of operation
If returns from heating zones do not return to the same pipe on the same side of the distribution valve, then heating can be provided, but energy metering becomes impossible with a single flow meter
Solution Approach 1:
The hydraulic circuit is configured to merge all returns from heating zones to the same return pipe on the same side of the distribution valve. This merging of return flows enables accurate energy metering using a single flow meter and two temperature sensors, simplifying the measurement system while maintaining the flexibility to serve multiple heating zones from different energy sources.
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 configuration enhances energy savings by reducing heat losses and simplifies energy metering, improving the efficiency of both solar and backup energy usage, allowing for direct heating of zones and efficient energy distribution.
Implementation Method 1
a solar energy production system having at least one thermal solar collector
Implementation Method 2
heat transfer fluid circulating in the elementary heating circuits
Implementation Method 3
a storage tank containing a first solar heating zone (13, 130, 1300) and a second heating zone (14, 140, 1400)
Data Source
AI summary
The installation (10) has a hydraulic system (11) connected to a solar energy producing system. A storage tank (13) is provided with a solar heating zone (L1) and an auxiliary heating zone (L2). Elementary heating circuits (CC1-CC3) and an auxiliary hydraulic circuit (CA) are connected in derivation on same side of a distribution valve (V1), so that solar energy from a thermal solar collector (12) heats heating zones (ZCH1-ZCH3) without passing via an auxiliary source (14) that supplies the solar energy to the heating zones without passing through the storage tank.