Heat transfer method
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Solution Overview
Problem
Water has a small heat transfer amount per unit mass compared to refrigerants like chlorofluorocarbons, leading to larger pipes and increased facility costs in heat transfer systems.
Innovation Solution
A heat transfer method using inorganic hydrate slurry in water, where the temperature and hydrate concentration differ between flow paths, allowing for both sensible and latent heat transfer, with larger pipes in one path to manage pressure loss and reduce costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If water is used as a heat transfer medium, then global warming countermeasures are improved, but pipe size increases and facility introduction cost increases
Solution Approach 1:
The patent changes the physical-chemical parameters of the heat transfer medium by using inorganic hydrate slurry instead of pure water. The slurry contains suspended inorganic hydrate particles that provide latent heat transfer capability, increasing the heat transfer amount per unit mass while maintaining the environmentally friendly water-based composition.
Solution Approach 2:
The patent creates a composite heat transfer medium by combining water with suspended inorganic hydrate particles. This composite slurry utilizes both the sensible heat capacity of water and the latent heat of dissolution of the inorganic hydrate, achieving refrigerant-level heat transfer efficiency while remaining environmentally benign.
2Volume of moving object
If inorganic hydrate slurry is used to increase heat transfer amount, then pipe size can be reduced, but pressure loss increases
Solution Approach 1:
The patent applies different pipe diameters to different flow paths based on the local requirements of each path. The first flow path carrying cold heat transfer medium uses a larger diameter pipe to reduce pressure loss, while the second flow path uses a smaller diameter pipe, optimizing the overall system performance.
Solution Approach 2:
The patent dynamically adjusts the temperature of the heat transfer medium in different flow paths to optimize performance. By controlling the temperature difference between the first and second flow paths, the system maximizes heat transfer efficiency while managing pressure loss characteristics of the inorganic hydrate slurry.
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 method efficiently transfers heat, reduces pipe size and costs, and maintains safe operation using phosphoric acid-based inorganic hydrates, ensuring large temperature differences and minimizing pressure loss.
Implementation Method 1
inorganic hydrate slurry in which an inorganic hydrate that absorbs heat when dissolved in water is mixed with water
Implementation Method 2
heat is exchanged between a heat transfer medium and a heat source. In the utilization unit, heat is exchanged between the heat transfer medium and a temperature adjustment target
Data Source
Figure 1
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AI summary
Provided is a heat transfer method capable of reducing the introduction cost of a heat transfer system. The heat transfer method is a heat transfer method using a heat transfer system including: a heat source unit in which heat is exchanged between a heat transfer medium and a heat source; a utilization unit in which heat is exchanged between the heat transfer medium and a temperature adjustment target; and a first flow path and a second flow path that connect the heat source unit and the utilization unit. The heat transfer medium flows through the first flow path from the heat source unit to the utilization unit, and flows through the second flow path from the utilization unit to the heat source unit. In the heat transfer method, inorganic hydrate slurry, in which an inorganic hydrate that absorbs heat when dissolved in water is mixed with water, is used as the heat transfer medium. In the heat transfer method, the heat transfer system is controlled so that a temperature of the heat transfer medium flowing through the first flow path and a temperature of the heat transfer medium flowing through the second flow path become equal to or below a melting point of the inorganic hydrate. The heat transfer method inc ludes making an amount of the inorganic hydrate dissolved in the heat transfer medium flowing through the first flow path different from an amount of the inorganic hydrate dissolved in the heat transfer medium flowing through the second flow path.