System for producing heat source for heating or electricity using medium/low temperature waste heat, and method for controlling the same
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Solution Overview
Problem
Adsorption-type heat pump systems for waste heat recovery have low efficiency in summer seasons due to low operation ratios, as they are optimized for high heating demand in winter.
Innovation Solution
A system incorporating an absorption-type heat pump with a regenerator heat exchange unit, evaporator heat exchange unit, and a switching valve unit to selectively produce heat or electricity using medium- or low-temperature waste heat, allowing for closed-loop heat medium circulation and integration with Rankine cycle for electricity generation, and heat production for heating demands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an adsorption-type heat pump is used for waste heat recovery, then heating efficiency is improved in winter seasons, but waste heat recovery efficiency decreases in summer seasons due to low operation ratio
Solution Approach 1:
The system enables the heat pump to perform multiple functions by switching between heating mode (absorption heat pump operation) and cooling mode (conventional vapor compression operation), allowing it to adapt to different seasonal demands and maintain high operation ratios year-round
Solution Approach 2:
The system dynamically switches between absorption heat pump operation and conventional vapor compression operation based on seasonal conditions and heating demand, optimizing the operation ratio and waste heat recovery efficiency for each season
2Ease of operation
If a heating water supply system based on adsorption-type heat pump is implemented, then heating demand is met in winter, but the system complexity increases due to additional components needed for year-round operation
Solution Approach 1:
The system merges the absorption heat pump system with a conventional vapor compression heat pump system, sharing common components such as condensers, evaporators, and heat exchangers, thereby reducing overall system complexity while maintaining year-round operational capability
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 enhances waste heat recovery efficiency by utilizing waste heat for both heating and electricity production throughout the year, improving overall energy utilization.
Implementation Method 1
increase a temperature of a low-temperature heat medium to a high temperature by means of absorption heat in an absorber
Implementation Method 2
increase a temperature of a low-temperature heat medium to a high temperature by means of absorption heat in an absorber and condensation heat in a condenser
Implementation Method 3
drive a steam turbine on the basis of the Rankine cycle, thereby producing electricity
Implementation Method 4
undergo indirect heat exchange with the high-temperature heat medium
Implementation Method 5
undergo indirect heat exchange with the high-temperature heat medium and to supply a heat-demanding place with a heat source for heating
Data Source
AI summary
A system for producing a heat source for heating or electricity, using medium/low-temperature waste heat includes: an absorption-type heat pump (100) supplied with a driving heat source and heat source water to heat a low-temperature heat medium; a regenerator heat exchange unit (210) for supplying a regenerator (110) with a driving heat source using waste heat; an evaporator heat exchange unit (220) for supplying an evaporator with heat source water; a heat medium circulation line (310) for circulating a heat medium; a generation unit (400) branching off from the heat medium circulation line (310) and producing electricity; a heat production unit (500) branching off from the heat medium circulation line (310) and supplying a heat-demanding place with a heat source for heating; and a switching valve unit (600) for controlling the flow of heat medium supplied the generation unit (400) or the heat production unit (500).