Test device and test method for latent heat of composite phase-change material

Abstract

The invention discloses a test device for latent heat of a composite phase-change material. In the test device, a sample of the composite phase-change material is clamped by means of two plate heat-flow meters having equal area to form a sandwich structure. Two constant-temperature aluminum plates having larger area are respectively fixed to exteriors of the two plate heat-flow meters tightly. A groove can be formed in each constant-temperature aluminum plate to allow the plate heat-flow meter to be installed therein. Peripheries of the plate heat-flow meters and the sample are sealed by means of a heat preservation material to fix the plate heat-flow meters and the sample in the central zones of the constant-temperature aluminum plates. The temperature of the sample is accurately controlled through the constant-temperature aluminum plates. The temperature of the constant-temperature aluminum plates is accurately controlled through a constant-temperature device. The plate heat-flow meters detect the heat flow quantity in the sample during temperature increasing and temperature reducing, so that sensible heat and latent heat of the sample can be obtained by measuring absolute heat adsorbed by and released from the sample of the composite phase-change material in a series of small-range temperature increasing and temperature reducing processes through the plate heat-flow meters, and then simply calculating the detect results through a formula. The invention also discloses a test method for the latent heat of the composite phase-change material.

Description

technical field [0001] The invention relates to the technical field of latent heat measurement, in particular to a latent heat measurement device and a measurement method of a composite phase change material. Background technique [0002] Phase change materials (PCM, PhaseChangeMaterial) can use the temperature difference between the environment and the material as a driving force to change their physical state (vapor-liquid, solid-liquid, etc.) within a certain temperature range to achieve heat storage or release. Taking advantage of this energy storage feature, combining PCM with traditional building materials (such as cement mortar, gypsum wallboard, etc.) Heating at night, so as to achieve the energy-saving effect of buildings, reduce peak power consumption, cut peaks and fill valleys, and alleviate urban power shortages; phase change materials can also improve the heat storage capacity of building envelopes and reduce indoor temperature fluctuations , improve the comfo...

AI Technical Summary

Problems solved by technology

At present, there is no scientific and accurate device for measuring the phase change latent heat of composite phase change materials at home and abroad.

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