Modular Heating and Cooling System with Independent Fluid Loops
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Solution Overview
Problem
Conventional modular heating and cooling systems require the same fluid mixture for heating and cooling cycles, leading to inefficiencies due to the use of glycol solutions, which are less effective and more expensive for heat transfer.
Innovation Solution
A modular system with dedicated and independent heating and cooling fluid loops, allowing for separate fluids to be used in each loop, eliminating the need for glycol and enhancing efficiency by using water for better heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional modular systems use the same fluid mixture for heating and cooling cycles, then the system can operate with a single fluid loop configuration, but the system efficiency deteriorates due to the use of glycol solutions which are less effective for heat transfer
Solution Approach 1:
The system divides the fluid loops into separate heating and cooling loops, allowing each loop to use optimized fluid types. The heating loop can use water while the cooling loop uses glycol mixture, eliminating the need for a single universal fluid and improving heat transfer efficiency in each dedicated loop.
Solution Approach 2:
Different fluid compositions are assigned to different loops based on their specific requirements. The heating loop uses water for superior heat transfer, while the cooling loop uses glycol mixture for freeze protection, optimizing local conditions in each loop rather than using a compromise solution system-wide.
2Reliability
If conventional modular systems use glycol solutions in fluid loops, then the loops can operate in outdoor conditions with freeze protection, but the system cost increases and heat transfer performance deteriorates
Solution Approach 1:
The system separates outdoor-exposed loops from indoor loops, allowing only the necessary outdoor loops to contain glycol while indoor loops use pure water. This segmentation enables freeze protection where needed without compromising heat transfer efficiency in water-filled loops.
Solution Approach 2:
Glycol is applied locally only in loops that require freeze protection based on their exposure conditions, rather than system-wide application. This localized approach maintains reliability in outdoor conditions while preserving heat transfer effectiveness in protected indoor loops.
3Adaptability or versatility
If conventional systems use three-way valves and fluid mixing to switch between heating and cooling modes, then the system can adapt to different load requirements, but the system complexity increases and fluid contamination occurs
Solution Approach 1:
The system uses separate dedicated loops for heating and cooling operations, eliminating the need for complex three-way valves and fluid mixing mechanisms. Each loop operates independently with its own pump and heat exchangers, simplifying the valve system while maintaining adaptability through independent loop control.
Solution Approach 2:
The heat exchangers are designed to function in both heating and cooling modes by reversing refrigerant flow direction, eliminating the need for separate heating and cooling exchangers. This multi-functionality allows the system to adapt to different load requirements without complex fluid switching infrastructure.
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 achieves greater efficiency and cost-effectiveness by allowing different fluids to be used in each loop, improving heat transfer performance and reducing costs.
Implementation Method 1
a refrigerant line system configurable for selectively directing refrigerant fluid through: the first and third heat exchangers and a compressor for cooling the first fluid
Implementation Method 2
the first and third heat exchangers and a compressor for cooling the first fluid
Data Source
Figure 1
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Figure 4~5
AI summary
A heating and cooling system comprising a plurality of heating and cooling apparatuses. Each of the heating and cooling apparatuses includes a first heat exchanger, a second heat exchanger, a third heat exchanger, a compressor, a cooling fluid-in line, a cooling fluid-out line, a heating fluid-in line, a heating fluid-out line and a refrigerant line system coupled to the first, second and third heat exchangers. The refrigerant line system is configured to: direct refrigerant fluid through the first and third heat exchangers and the compressor, to cool a first fluid, in a cooling mode of operation; direct the refrigerant fluid through the second and third heat exchangers and the compressor, to heat a second fluid, in a heating mode of operation; and direct the refrigerant fluid through the first and second heat exchangers and the compressor, to cool the first fluid and heat the second fluid, in a heating and cooling mode of operation. The cooling fluid-in line and the cooling fluid-out line are coupled to each of the first heat exchangers of the plurality of heating and cooling apparatuses. The heating fluid-in line and the heating fluid-out line are coupled to each of the second heat exchangers of the plurality of heating and cooling apparatuses. Each of the plurality of heating and cooling apparatuses are set to an operating mode selected from the cooling mode, the heating mode, the heating and cooling mode and a standby mode independently from one another.