Recirculating Chemical Heater for Precise Liquid Temperature Control
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Solution Overview
Problem
Existing heating systems that utilize exothermic chemical reactions for heating liquids are inefficient as they often waste heat and do not maximize the energy generated from these reactions, leading to suboptimal temperature control and energy loss.
Innovation Solution
An apparatus that recycles the reaction mixture through a loop, allowing for multiple passes and controlled addition of reactants based on temperature and chemical parameters, ensuring maximum heat extraction and efficient heating of liquids, such as water, by using an electronic control device to manage the dispensing of chemical reactants and circulation of the reaction mixture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the reaction mixture is passed through the heat exchanger only once, then the heating process is simple, but heat extraction is incomplete and energy is wasted
Solution Approach 1:
The reaction mixture is circulated through the heat exchanger in a continuous loop multiple times, allowing repeated heat extraction. This continuous circulation ensures that all available thermal energy is extracted from the reaction mixture before it is discarded, eliminating waste heat and maximizing energy utilization from the exothermic reaction.
2Measurement precision
If chemical reactants are added continuously without control, then heating can be maintained, but temperature control becomes imprecise and energy efficiency decreases
Solution Approach 1:
A sensor continuously monitors the temperature of the reaction mixture and provides feedback to the controller. The controller adjusts the dispensing rate of chemical reactants based on this feedback, maintaining precise temperature control. This closed-loop control system ensures optimal energy efficiency by adding reactants only when needed to maintain the desired temperature, preventing both overheating and insufficient heating.
3Productivity
If the reaction mixture is circulated multiple times through the heat exchanger, then heat extraction is maximized, but the system becomes more complex
Solution Approach 1:
The system merges the reaction chamber and heat exchanger into a single integrated loop, where the reaction mixture flows from the reaction chamber directly through the heat exchanger and back to the reaction chamber. This combined design allows multiple circulation passes without requiring separate complex systems, achieving high heating efficiency through a relatively simple integrated structure.
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 maximizes heat extraction from exothermic chemical reactions, minimizing energy loss and providing efficient and controlled heating, making it suitable for domestic and industrial water heating systems, even in locations without mains electricity or gas supplies.
Implementation Method 1
the chemical reactants undergo an exothermic chemical reaction to generate heat
Implementation Method 2
a heat exchanger having an inlet and an outlet for the reaction mixture and an inlet and an outlet for the liquid, so that when the liquid passes through the heat exchanger it is heated by heat transfer from the reaction mixture
Data Source
AI summary
An apparatus for heating a liquid includes: a mixing chamber; dispensing means; an electronic control device linked to the dispensing means; one or more pumps; a heat exchanger; one or more monitoring stations being arranged to communicate with the electronic control device; a waste outlet; and a second heat exchanger, wherein the mixing chamber, heat exchanger and the one or more monitoring stations are connected so as to form a loop; and wherein the electronic control device is programmed to cause reaction mixture to be circulated around the loop at least twice, and optionally to cause the dispensing means to dispense further metered amounts of first and/or second chemical reactants into the mixing chamber; and/or to cause a proportion of reaction mixture to be ejected through the waste outlet, in order to control the temperature of the reaction mixture passing through the heat exchanger.