Dual-purpose tank with phase change heat storage and temperature difference cold storage

Abstract

The invention relates to a dual-purpose tank with phase change heat storage and temperature difference cold storage. The dual-purpose tank comprises a tank body. A heat preservation layer is arrangedon the outer side of the tank body. The tank body is internally divided into left, middle and right tank units. The left and right tank units are separately provided with an inlet and outlet. The middle tank unit is provided with a phase change element being separated from the left and right tank units by a grid. Compared with the prior art, the dual-purpose tank has dual functions of the phase change cold storage and temperature difference heat storage. The complexity degree is less than ice cold storage. The tank is similar to water cold storage, but the installed capacity is reduced, and the occupied space is less than that of water cold storage. Initial investment is equivalent to that of ice cols storage, but the running temperature is higher than that of ice cold storage. The economical efficiency is good. The running temperature of a cooling main machine of an ice cold storage system is low, and therefore electricity consumption of ice cold storage is greater than that of a conventional air conditioner. Compared with theconventional air conditioner, water cold storage saves about 10% of electricity. Compared with the conventional air conditioner, phase change energy storagesaves more than 10% of the electricity, and the running cost is saved by more than 35%.

Description

technical field [0001] The invention relates to an energy storage device, in particular to a dual-purpose tank with phase change heat storage and temperature difference cold storage. Background technique [0002] Commonly used cold storage methods include ice storage and water storage, both of which have some disadvantages. [0003] Ice storage has the following disadvantages: ①The main engine and the primary system use ethylene glycol, and the system is extremely complex and huge. ②It occupies a large area. ③The system temperature is low and the refrigeration efficiency is low. [0004] Water energy storage has the following disadvantages: ①The energy storage density is low. ② The reservoir occupies a large area and has a large volume. Contents of the invention [0005] The object of the present invention is to provide a dual-purpose tank with phase change heat storage and temperature difference cold storage in order to overcome the above-mentioned defects in the prio...

AI Technical Summary

Problems solved by technology

[0003] Ice storage has the following disadvantages: ① The main engine and the primary system use ethylene glycol, and the system is extremely complex and huge

②Large floor area

③The system temperature is low and the cooling efficiency is low

[0004] Water energy storage has the following disadvantages: ① Low energy storage density

②The reservoir occupies a large area and has a large volume

Images