Solar water heater phase change heat storage material and its preparing method

Abstract

The present invention discloses a kind of phase change heat storing material for solar water heater and its preparation process. The phase change heat storing material consists of sodium acetate trihydrate 80-90 wt%, barium hydroxide octahydrate 1-10 wt%, sodium borate decahydrate 1-5 wt%, zinc acetate 1-5 wt%, sodium dodecyl benzene sulfonate 1-5 wt% and gelatin 1-5 wt%. During the preparation, the mixture of the above said materials are heated to smelt completely to form the eutectic mixture, which is mounted inside solar water heater. The phase change heat storing material for solar water heater has phase change temperature fitting the operation temperature of solar water heater, high phase change latent heat, no overcooling and phase separation, no toxicity, no corrosion, stable performance and high repeatability, and is especially suitable for use in solar water heater.

Description

1. Technical field [0001] The invention relates to a solar heat storage material, in particular to a phase change heat storage material for a solar water heater and a preparation method thereof. 2. Background technology [0002] Energy saving and environmental protection are the most important issues in the field of energy utilization. Using phase change latent heat of phase change materials to store energy is a new environmental protection and energy saving technology. During the process of phase change, the phase change material absorbs the heat of the environment and releases heat to the environment when needed, so as to achieve the purpose of controlling the temperature of the surrounding environment and saving energy. It has broad application prospects in solar energy utilization, heat energy recovery, refrigeration and air conditioning, building energy saving, aerospace and other fields. [0003] Since the reform and opening up, my country's comprehensive national str...

AI Technical Summary

Problems solved by technology

However, because the supply and demand of solar energy cannot be well matched and coordinated in terms of quantity and time, a large amount of energy is wasted

For example, excess solar energy during the day causes solar energy to be wasted in vain, and solar energy is not enough at night and in rainy days

Moreover, in solar water heaters, the water heat storage energy storage density is low, the volume is large, and the energy storage efficiency is poor.

At present, there is no efficient and stable phase change heat storage material that can make solar energy available on demand