Stirling Heat Pump Integration for Low-Temperature Heating Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing heating systems face inefficiencies in low temperature environments, as refrigerant circuits struggle to absorb sufficient thermal energy from outdoor environments to meet heating demands, leading to reduced performance and increased energy costs.
Innovation Solution
The implementation of a Stirling heat pump system that includes a hot side chamber and a cold side chamber connected by a working fluid, integrated with a heating fluid circuit that circulates a heating fluid through air conditioning and hot water heating coils, allowing for adjustable flow control via a control valve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a refrigerant circuit is used to provide heating, then heating capacity is provided over a given temperature range, but heating efficiency deteriorates in very low temperature environments
Solution Approach 1:
The system is divided into two separate circuits: a refrigerant circuit for cooling and a heating fluid circuit for heating. This segmentation allows each circuit to be optimized independently, with the heating circuit using a Stirling heat pump that can efficiently operate in low temperature environments without being constrained by refrigerant circuit limitations.
Solution Approach 2:
The Stirling heat pump serves multiple functions: it provides heating for both the heating fluid circuit and can supplement the refrigerant circuit in cold conditions. The system can operate in different modes (heating mode, cooling mode, supplemental heating mode) depending on environmental conditions and demand, making it universally applicable across various temperature ranges.
2Power
If electrical heating elements are used to improve heating performance in low temperature environments, then heating capacity is increased, but energy efficiency deteriorates and energy costs increase
Solution Approach 1:
The Stirling heat pump acts as an intermediary device that transfers thermal energy from the outdoor environment to the heating fluid, rather than directly converting electrical energy to heat. This indirect approach maintains high energy efficiency by utilizing the high coefficient of performance (COP) of heat pump technology, avoiding the 100% energy conversion loss inherent in electrical resistance heating.
3Power
If a refrigerant circuit operates in very low temperature environments, then heating demand can be met, but thermal energy absorption from the outdoor environment is insufficient
Solution Approach 1:
The system changes the working fluid parameter from refrigerant to heating fluid (such as water or glycol-based fluid), which has different thermal properties better suited for low temperature heat extraction. The Stirling heat pump's working fluid and thermodynamic cycle are optimized for operating in very low temperature environments, allowing efficient thermal energy absorption even when outdoor temperatures are far below freezing.
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 solution enhances heating performance in low temperature environments by efficiently transferring thermal energy, reducing energy costs, and providing a more efficient alternative to traditional electrical heating elements.
Implementation Method 1
a Stirling heat pump configured to provide heating to a heating fluid, the Stirling heat pump including a hot side chamber and a cold side chamber, the hot side chamber and the cold side chamber fluidly connected by a working fluid
Implementation Method 2
an air conditioning heating coil, the air conditioning heating coil configured to heat the conditioned air circulated through an air handling unit
Implementation Method 3
a circulation pump coupled to the heating fluid circuit and configured to circulate the heating fluid through the heating fluid circuit
Data Source
AI summary
Examples of the present disclosure relate to systems and methods for providing hot water for a hot water heater and heating capacity for a climate control system by utilizing a Stirling heat pump system. The Stirling heat pump may be partially integrated into an indoor unit of the climate control system and a hot water heater. An additional indoor heat exchanger may receive heating fluid from the Stirling heat pump system to provide heating capacity in addition to another indoor heat exchanger of the climate control system. Further, the heating fluid circuit of the Stirling heat pump system may be partially integrated into a hot water tank for heating water. A controller may direct the flow of heating fluid from the Stirling heat pump to the hot water tank and/or the climate control system based on a request for heating.