Pool-Coupled Water Source Heat Pump Pressure Control
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Solution Overview
Problem
Conventional water source heat pumps are inefficient in hot climates with small swimming pools, as they struggle to maintain system pressure, leading to reduced cooling efficiency and increased energy costs, especially when humidity is high and pool water temperature exceeds 95°F.
Innovation Solution
A system that includes a swimming pool with a pump, a pool cooler, and a water source heat pump, featuring a valve mechanism to control water flow and pressure, ensuring efficient cooling of both the pool water and building, using a pressure control valve to maintain optimal pressure between 8 and 10 p.s.i.g. for the pool cooler and 4 and 6 p.s.i.g. for the heat pump, while a modulating valve limits water flow to 1.5 to 2 gallons per minute per ton.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional water source heat pump is used with a small swimming pool in hot climates, then the system can provide heating and cooling functionality, but the system pressure cannot be maintained when pool water temperature exceeds 95°F, leading to reduced cooling efficiency
Solution Approach 1:
The system divides the water flow into separate pathways using valve mechanisms. One pathway directs water to the heat pump for heating/cooling while another pathway allows water to circulate through the pool cooler independently. This segmentation enables the system to maintain proper pressure for the heat pump while separately managing pool water temperature, resolving the conflict between system pressure maintenance and pool water temperature control in hot climates.
2Productivity
If a pressure control valve is added to maintain optimal pressure for the pool cooler, then cooling efficiency improves, but device complexity increases
Solution Approach 1:
The valve mechanism is designed to perform multiple functions: it controls water flow distribution between the heat pump and pool cooler, maintains optimal pressure for both systems, and enables independent operation of either component. By making the valve mechanism multi-functional, the system achieves improved cooling efficiency without adding excessive complexity, as a single integrated valve assembly handles multiple control tasks that would otherwise require separate devices.
3Power
If water flow to the heat pump is increased to improve heating/cooling capacity, then system performance improves, but energy efficiency decreases due to excessive flow rates
Solution Approach 1:
The system employs modulating valves that dynamically adjust water flow rates based on real-time system conditions and demand. Rather than maintaining a fixed high flow rate, the valves modulate flow to match the actual heating or cooling load, ensuring optimal heat transfer efficiency while preventing excessive energy consumption. This dynamic control allows the system to maintain high power capacity when needed while operating efficiently under varying conditions.
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 effectively cools pool water by 10 to 15°F, enhances the energy efficiency of the heat pump, reduces utility bills, and maintains system performance even in high ambient temperatures, achieving an energy efficiency ratio of over 22.4 and a coefficient of performance of 6.565, significantly lower than conventional systems.
Implementation Method 1
a pool cooler suitable for cooling water passing therethrough
Implementation Method 2
a water source heat pump cooperative with the pump so as to receive water as passed by an outlet pipe of the pump
Implementation Method 3
The pool cooler has an inlet line and an outlet line connected thereto
Implementation Method 4
The water source heat pump has a condenser, an evaporator and a compressor with a reversing valve cooperative therewith
Implementation Method 5
The water source heat pump has a condenser, an evaporator and a compressor
Implementation Method 6
The water source heat pump has a condenser, an evaporator and a compressor
Data Source
AI summary
A heating and cooling system includes a swimming pool, a pump connected to the swimming pool, a pool cooler connected to the pump so as to cool water passing from the pump, a water source heat pump cooperative with the pump so as to receive water as passed by the outlet pipe of the pump, a valve mechanism connected to the outlet of the pump so as to control the flow of water toward the pool cooler and the water source heat pump, and a pressure control valve cooperative between the valve mechanism in the inlet line of the pool cooler so as to limit a pressure of the water flowing from the valve mechanism toward the inlet line of the pool cooler. A pressure control is connected to the outlet line of the pool cooler so as to reduce a pressure of the water flowing from the outlet line to the pump.