Generalized Performance Characteristics of Refrigeration and Heat Pump Systems

<table>Dimensionless cooling rate (<svg height="10.35" id="M82" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 11.5875 10.35" width="11.5875" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,10.35)">
<g transform="translate(72,-63.72)">
<text transform="matrix(1,0,0,-1,-71.95,63.77)">
<tspan style="font-size: 11.21px; " x="0" y="0">𝑟</tspan>
</text>
<text transform="matrix(1,0,0,-1,-67.38,68.25)">
<tspan style="font-size: 7.85px; " x="0" y="0">∗</tspan>
</text>
</g>
</g>
</svg>) versus coefficient of performance (<svg height="6.6999998" id="M83" style="vertical-align:-0.10126pt" version="1.1" viewbox="0 0 10.9875 6.6999998" width="10.9875" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,6.7)">
<g transform="translate(72,-66.64)">
<text transform="matrix(1,0,0,-1,-71.95,66.79)">
<tspan style="font-size: 11.21px; " x="0" y="0">𝑤</tspan>
</text>
</g>
</g>
</svg>) for the thermoelectric refrigerator. Plots are presented for different values of the figure of merit (<svg height="10.35" id="M84" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 17.674999 10.35" width="17.674999" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,10.35)">
<g transform="translate(72,-63.72)">
<text transform="matrix(1,0,0,-1,-71.95,63.77)">
<tspan style="font-size: 11.21px; " x="0" y="0">𝑍</tspan>
</text>
<text transform="matrix(1,0,0,-1,-62.51,68.25)">
<tspan style="font-size: 7.85px; " x="0" y="0">∗</tspan>
</text>
</g>
</g>
</svg>) in the range 0.3–<svg height="6.1500001" id="M85" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 13.1 6.1500001" width="13.1" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,6.15)">
<g transform="translate(72,-67.08)">
<text transform="matrix(1,0,0,-1,-71.95,67.13)">
<tspan style="font-size: 11.21px; " x="0" y="0">∞</tspan>
</text>
</g>
</g>
</svg>, where <svg height="10.35" id="M86" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 48.025002 10.35" width="48.025002" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,10.35)">
<g transform="translate(72,-63.72)">
<text transform="matrix(1,0,0,-1,-71.95,63.77)">
<tspan style="font-size: 11.21px; " x="0" y="0">𝑍</tspan>
</text>
<text transform="matrix(1,0,0,-1,-62.51,68.25)">
<tspan style="font-size: 7.85px; " x="0" y="0">∗</tspan>
</text>
<text transform="matrix(1,0,0,-1,-54.8,63.77)">
<tspan style="font-size: 11.21px; " x="0" y="0">=</tspan>
<tspan style="font-size: 11.21px; " x="10.782096" y="0">∞</tspan>
</text>
</g>
</g>
</svg> corresponds to lossless operation.</table>

Physics Research International

fig3

Figure 3

Figure 3: Generalized Performance Characteristics of Refrigeration and Heat Pump Systems 