Gravity field low-grade heat source conversion device and method

Abstract

The invention discloses a low-grade heat source conversion device in a gravity field, comprising a high-level evaporator (4) with built-in working fluid, a low-level condenser (1), a liquid pump (2) and a low-level heater (3); the high-level evaporator The evaporation pipeline of the device (4), the condensation pipeline of the low-level condenser (1), the liquid pump (2), and the heating pipeline of the low-level heater (3) are connected in sequence to form a closed loop; the high-level evaporator (4) is located at High position; low position The condenser (1), liquid pump (2) and low position heater (3) are located at the low position; the gap between the high position and the low position is greater than or equal to 100 meters.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to a low-grade heat source conversion device and method in a gravity field. Background technique [0002] There are a large number of objective demands for low-grade heat sources (15-25°C) in air-conditioning projects, and there are often a large number of low-grade heat sources (<50°C) in the environment. How to use these low-grade heat sources to obtain low-grade heat sources is It is an important direction for the utilization of renewable energy, but the main challenge is that due to the low quality of the heat source and the small transfer potential difference available, higher requirements are placed on the reversibility of the system. [0003] At present, there are two main ways of heat-cold conversion, one is to use the absorption refrigeration cycle to realize this conversion, but because there are five heat transfer processes and two mass transfer processes in th...

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Problems solved by technology

[0003] At present, there are two main ways of heat-cold conversion, one is to use the absorption refrigeration cycle to realize this conversion, but because there are five heat transfer processes and two mass transfer processes in the absorption refrigeration cycle, the system is not only complicated , and the irreversible loss is large, so it is not suitable for the conversion process of low-grade heat source-low-grade cold source

[0004] Another possible solution is to use the ejector refrigeration cycle to achieve heat-cold conversion. Although the system is relatively simple, the mixing process and high-speed flow process in the ejector will produce greater irreversible losses, and the efficiency is very low. therefore inappropriate

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