Heat recovery device
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Solution Overview
Problem
Existing heat recovery systems do not effectively preheat and reheat supply water to a higher temperature using a heat recovery heat exchanger, as they separate cooling and water supply paths and do not consider heat recovery from hot water after passing through an air cooler.
Innovation Solution
A heat recovery device with an auxiliary cooling heat exchanger, a heat recovery exchanger, a preheating heat exchanger, and a preheating bypass path that allows heat exchange between cooling water and supply water, enabling preheating and reheating of supply water to a higher temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the cooling water path and water supply path are separated without heat exchange, then the system structure is simple, but heat recovery from hot water after the air cooler is not achieved
Solution Approach 1:
The patent merges the cooling water path and water supply path through a heat exchanger, allowing heat exchange between the two previously separate systems. This combines the cooling function and hot water supply function into an integrated heat recovery system, enabling energy recovery while maintaining clear functional separation through the heat exchanger interface.
Solution Approach 2:
The patent recovers waste heat from the cooling water that would otherwise be discarded after cooling the compressed air. By directing this hot cooling water through a heat exchanger to preheat supply water, the system transforms waste thermal energy into useful heating capacity, significantly improving overall energy efficiency.
2Temperature
If supply water temperature is lower than cooling water temperature, then preheating is needed, but no preheating mechanism is provided in the existing system
Solution Approach 1:
The patent introduces a heat exchanger as an intermediary device between the cooling water and supply water systems. This mediator enables thermal energy transfer from the hot cooling water to the cooler supply water without direct mixing, allowing temperature elevation of supply water while maintaining system separation and control.
3Temperature
If only single-stage heating is used, then the system is simple, but the supply water temperature is insufficient for high-temperature applications
Solution Approach 1:
The patent segments the heating process into two distinct stages: first, preheating supply water using hot cooling water in the heat exchanger; second, further heating the preheated water using the heat recovery heat exchanger. This multi-stage segmentation enables achievement of high final water temperatures by combining multiple heat sources sequentially.
Solution Approach 2:
The patent performs preliminary preheating of supply water before it enters the main heat recovery heat exchanger. This preliminary action raises the initial temperature of supply water, reducing the heating burden on the subsequent stage and enabling more efficient achievement of high final temperatures.
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 efficiently preheats and reheats supply water to a higher temperature, improving the heat recovery rate by utilizing heat from both the cooling water and hot water sources, enhancing the application range of hot water usage.
Implementation Method 1
The preheating heat exchanger allows heat exchange between cooling water on an outlet side of the auxiliary cooling heat exchanger and the supply water that has passed through the preheating bypass path
Implementation Method 2
a heat recovery exchanger that heats supply water
Implementation Method 3
an auxiliary cooling heat exchanger that performs auxiliary cooling
Data Source
AI summary
A preheating heat exchanger allows heat exchange between cooling water on an outlet side of an auxiliary cooling heat exchanger and supply water that has passed through a preheating bypass path.