Fig. 1: E-CE cycle and temperature change of TPEs-1.
From: Solid-state cooling by elastocaloric polymer with uniform chain-lengths
a Schematic T-S diagram of the E-CE cooling cycle. The insets show the variations of the sample temperature as a function of strain. During stage 1–2, the sample is stretched adiabatically by a uniaxial tension, increasing the surface temperature (Ta → T2). During stage 2–3, the strain remains constant, and the thermal entropy decreases isothermally until T = Ta. During stage 3–4, the specimen retracts adiabatically with the unloading of the tension, further decreasing the temperature of the specimen (Ta → T4). During stage 4–1, the thermal entropy of the material increases until T = Ta. b Typical strain evolution (analogized from the displacement of the slide table) and the resulting temperature variation of TPEs-1 during a single E-CE cycle. c Infrared thermal images of different processes recorded using an infrared thermal imager.
