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Gravitational field low-grade heat source conversion device and method

A low-grade heat source and conversion device technology, applied in heat pumps, lighting and heating equipment, mechanical equipment, etc., can solve problems such as low efficiency, large irreversible losses, and inappropriateness, and achieve high efficiency and fewer system links

Active Publication Date: 2016-05-04
嘉兴芸诗娇电子商务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Gravitational field low-grade heat source conversion device and method

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Embodiment 1

[0021] Embodiment 1, figure 1 A low-grade heat source conversion device and method in a gravity field are provided.

[0022] The gravity field low-grade heat source conversion device is composed of a high-level evaporator 4 with a built-in working fluid, a low-level condenser 1, a liquid pump 2, and a low-level heater 3; wherein, one end of the evaporation pipeline of the high-level evaporator 4 passes through the pipeline and the low-level condenser. One end of the condensing pipeline of 1 is connected, and the other end of the condensing pipeline of the low-level condenser 1 is provided with a liquid pump 2, and one end of the heating pipeline of the low-level heater 3 is connected through the liquid pump 2, and the other end of the heating pipeline of the low-level heater 3 The other end of the evaporation pipeline of the high-level evaporator 4 is communicated with through other pipelines. That is, the device of the present invention is composed of a closed-loop system fo...

Embodiment 1

[0030] The calculation parameters of implementation example 1 are shown in Table 1 for 1kg of working fluid R22. The design conditions are: the working fluid is R22, the vertical height difference between the high position and the low position of the system is 100m, the temperature / pressure of the low position heater is 37°C / 1.419Mpa, the temperature / pressure of the low position condenser is 30.7°C / 1.209Mpa, the temperature of the high position evaporator / pressure is 20.4℃ / 0.915Mpa, power consumption of liquid pump is 0.18kJ / kg, consumption of low-grade heat source is 8kJ / kg, supply of low-grade cold source is 7.51kJ / kg, system COP (defined as high-level evaporator The ratio of the cooling capacity to the sum of the power consumption of the liquid pump and the heat consumption of the low-level heater) is 0.92.

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Abstract

The invention discloses a gravitational field low-grade heat source conversion device. The gravitational field low-grade heat source conversion device comprises a high-grade evaporator (4) of an internally-contained working medium, a low-grade condenser (1), a liquid pump (2) and a low-grade heater (3). An evaporating pipeline of the high-grade evaporator (4), a condensing pipeline of the low-grade condenser (1), the liquid pump (2) and a heating pipeline of the low-grade heater (3) are sequentially connected to form a closed loop. The high-grade evaporator (4) is located in the high position. The low-grade condenser (1), the liquid pump (2) and the low-grade heater (3) are located in the low positions. The distance between the high position and the low positions 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B30/06F25B41/00F25B41/40
CPCF25B30/06F25B41/40
Inventor 王厉
Owner 嘉兴芸诗娇电子商务有限公司