PCM Energy Cell Cluster for Power Density

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Solution Overview

Problem

Existing energy systems for generating mechanical energy face challenges in optimizing power density and manufacturing cost, as well as efficiency.

Innovation Solution

The energy system comprises a cluster of elongated energy cells arranged parallel in a cylinder block, utilizing phase change materials (PCMs) that change from solid to liquid phase to generate mechanical energy, with an optimized heat transfer system involving tubular means and flanges for efficient heat exchange and fluid flow, and includes a cylinder head and bottom with integrated valve systems for controlling heat transfer media and working fluid.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If conventional heat engine designs are used, then mechanical energy can be generated, but power density and manufacturing cost are not optimized

Engineering Contradiction:
Improvepower densityVSAvoidmanufacturing cost
Core Design Contradiction:
PowerVSEase of manufacture

Solution Approach 1:

The heat engine is divided into multiple energy cells (first energy cell, second energy cell, etc.) arranged in parallel within a common cylinder block. Each energy cell operates independently with its own phase change material chamber, heat exchanging means, and movable means, allowing modular manufacturing and assembly while achieving high power density through parallel operation

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The invention utilizes phase change material that transitions between solid and liquid phases to generate mechanical energy. The phase change process absorbs and releases latent heat, driving the movable means (piston or membrane) to perform work, thereby converting thermal energy to mechanical energy with high efficiency and power density

Inventive Principle:
Principle #36Phase transitions

2Power

If conventional heat engine designs are used, then mechanical energy can be generated, but efficiency is not optimized

Engineering Contradiction:
ImproveefficiencyVSAvoidenergy losses
Core Design Contradiction:
PowerVSLoss of energy

Solution Approach 1:

Multiple energy cells are combined within a single cylinder block sharing common structural elements (cylinder block, cylinder head, cylinder bottom, insulation layer). This merging reduces overall energy losses by minimizing external heat transfer surfaces and improving thermal efficiency through the combined operation of parallel cells

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The phase change material continuously cycles between solid and liquid phases, maintaining continuous mechanical work output. The insulating means ensures continuous thermal isolation, and the heat exchanging means maintains continuous heat transfer, enabling sustained efficient operation without energy losses

Inventive Principle:
Principle #20Continuity of useful action

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 enhances power density, reduces manufacturing costs, and improves efficiency by optimizing the use of heat transfer media and fluid flow, enabling effective mechanical energy generation with reduced energy losses.

Implementation Method 1

Each energy cell is operable to generate mechanical energy when a phase change material (PCM) changes from solid phase to liquid phase

Methodology Applied
Scientific EffectPhase change: Phase Change

Implementation Method 2

a heat exchanging means encompassed by the phase change material (PCM), and comprising heat transfer media

Methodology Applied
Scientific EffectHeat transfer: Conduction (thermal)

Implementation Method 3

an insulating means arranged between the housing means, and the phase change material (PCM)

Methodology Applied
Scientific EffectThermal insulation: Thermal Insulation

Data Source

PatentUS8671678B2Phase change material energy system
Publication Date: 2014.03.18 ATLAS COPCO AIRPOWER NV
  • US8671678B2 patent drawing
  • US8671678B2 patent drawing
  • US8671678B2 patent drawing

AI summary

The present invention relates to an energy system (100) operable to generate mechanical energy. The energy system (100) comprises a cluster of elongated energy cells (10). The energy cells (10) are arranged parallel to each other in their longitudinal direction in a cylinder block means (102). Each energy cell (10) is operable to generate mechanical energy when a phase change material (PCM) changes from solid phase to liquid phase. The energy system (100) also comprises a cylinder head means (104), and a cylinder bottom means (106), both connected to the cylinder block means (102). In FIG. 1, the energy system (100) is partly shown dismantled.