Phase change cold accumulation device

Abstract

The invention discloses a phase change cold accumulation device comprising a cold accumulation module and an outer circulation module. The outer circulation module comprises an air conditioning load,a water chilling unit, a water pump, a pressure stabilizing valve and a check valve. The cold accumulation module comprises a shell, a cold accumulation tank, a water inlet, a water outlet, water collection tanks, eutectic salt phase change materials and a three-dimensional network flow channel. The water inlet and the water outlet are formed in the shell. The cold accumulation tank is formed in the shell. The water collection tanks are formed in the two sides of the cold accumulation tank. The three-dimensional network flow channel is arranged in the cold accumulation tank. The spaces, exceptthe three-dimensional network flow channel, in the cold accumulation tank are filled with the eutectic salt phase change materials. Peak shifting and valley filling of electric power can be conducted, so that power grid safety is guaranteed, the efficiency of power generation equipment and power transmission and transformation equipment is improved, and limited resources are effectively utilized;and meanwhile, the operation cost of an air conditioning system is reduced, and intermittent work is well achieved.

Description

technical field [0001] The invention relates to a phase change cold storage device, in particular to a eutectic salt cold storage device with the structural characteristics of a three-dimensional network flow channel. Background technique [0002] In recent years, my country's power shortage situation has been severe, the "peak-to-valley difference" of the power load curve is huge, and the load rate and economic efficiency of power grid operation have declined. The increase rate of peak load in my country for many years is greater than the growth rate of power generation and electricity sales, and the load rate and utilization hours of power generation equipment are too low. Faced with this situation, we cannot rely solely on new installed capacity to make up for it, but must stagger peaks and flat valleys to give full play to the potential of existing power generation equipment. The phase change cold storage device has huge social benefits, specifically, it can store the e...

AI Technical Summary

Problems solved by technology

[0003] However, the thermal conductivity of eutectic salt materials is not large, the heat transfer performance is poor, and the energy storage and discharge rate is low, resulting in slow thermal diffusion and uneven heat flow distribution.

The maximum flow velocity of the counterflow inlet in a cross-channel electric heat exchanger can reach 3 to 4 times of the minimum flow velocity, and the uneven flow leads to heat exchange loss of up to 25%.

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