A multi-heat source heat exchange device

Abstract

The utility model belongs to heat exchange, recycling technical field, specifically disclose a kind of multi-heat source heat exchange device, including multiple heat sources, and each group of heat source connects a heat exchanger;Liquid gas phase change medium, the heat exchanger is located in the lower part of closed container and is immersed in liquid medium;The upper portion in the closed container is equipped with heat exchanger two, and heat exchanger two does not contact with liquid liquid gas phase change medium, and the heat exchanger two is connected with cold source.Compared with prior art, the utility model can carry out heat exchange recycling to multiple heat sources with same temperature or different temperature, and can reduce the temperature fluctuation of cold source side.

Description

Technical Field

[0001] This utility model relates to the field of heat energy exchange and recovery technology, and in particular to a multi-heat source heat energy exchange and recovery device. Background Technology

[0002] To save energy and reduce consumption, many enterprises have recovered waste heat generated during production and processing. Low-grade waste heat is recovered and converted into high-grade heat energy through heat pump technology or other methods before being used in production. Shell-and-tube heat exchangers are widely used in this heat recovery process. Traditional shell-and-tube heat exchangers are prone to significant temperature fluctuations on the cold source side due to variations in the heat source side temperature. This invention effectively reduces these fluctuations, which is highly beneficial for the safe and stable operation of the cold source side. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies and provide a multi-heat source heat energy exchange and recovery device.

[0004] To achieve the above objectives, this utility model is implemented according to the following technical solution: A multi-heat-source heat energy exchange and recovery device includes multiple sets of heat sources, each set of heat sources being connected to a heat exchanger; the multi-heat-source heat energy exchange and recovery device includes a sealed container filled with a liquid-gas phase change medium, a first heat exchanger located at the bottom of the sealed container and immersed in the liquid medium; a second heat exchanger is provided in the upper part of the sealed container, the second heat exchanger is not in contact with the liquid medium, and the second heat exchanger is connected to a cold source.

[0005] Furthermore, the temperatures of the multiple heat sources may be the same or different.

[0006] Furthermore, the liquid-gas phase change medium is one of alcohol, liquid ammonia, water, and Freon.

[0007] Furthermore, the cold source is the evaporator of a heat pump unit.

[0008] Compared with the prior art, this utility model recovers heat energy from multiple heat sources with the same or different temperatures and heats the cold source through the liquid-gas phase transformation of the medium. This reduces temperature fluctuations on the cold source side and is suitable for recovering low-grade heat energy generated in processing and production processes and producing high-grade heat energy through heat pump technology, or for use in places where temperature stability is a special requirement in production. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0010] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. The specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the utility model.

[0011] like Figure 1 As shown in the figure, this embodiment exemplarily demonstrates a multi-heat source heat energy exchange and recovery device for producing high-temperature water or steam by a heat pump unit. It includes multiple heat sources, each with the same or different temperatures, and each heat source is connected to a heat exchanger 3. The multi-heat source heat energy exchange and recovery device includes a sealed container 1 filled with a liquid-gas phase change medium 2. The heat exchanger 3 is located at the lower part of the sealed container 1 and is immersed in the liquid liquid-gas phase change medium 2. A second heat exchanger 4 is located at the upper part of the sealed container 1. The second heat exchanger 4 is not in contact with the liquid liquid-gas phase change medium 2 and is connected to a cold source. In use, the cold source is the evaporator of the heat pump unit, used by the heat pump unit to produce high-temperature water or steam.

[0012] In practical use, the liquid-gas phase change medium is one of alcohol, liquid ammonia, water and Freon. Water is the most commonly used. In this embodiment, water is used as an example. At this time, the initial pressure in the sealed container is -0.95 bar to -0.9 bar.

[0013] During heat recovery, when heat is input from the heat source, this embodiment uses water as a liquid phase change medium. The water evaporates into water vapor upon heating, and the water vapor condenses into liquid droplets upon contact with the cold source. Because the latent heat of vaporization of the water medium is large, and the water vapor generated during evaporation is immediately condensed into liquid water, the pressure fluctuation within the container is small. Therefore, the temperature fluctuation within the sealed container is small, thus maintaining a relatively constant temperature on the cold source side.

[0014] The technical solution of this utility model is not limited to the specific embodiments described above. All technical modifications made based on the technical solution of this utility model shall fall within the protection scope of this utility model.

Claims

1. A multi-heat-source heat exchange device, comprising multiple sets of heat sources, each set of heat sources connected to a heat exchange circuit; characterized in that: The multi-heat-source heat exchange device includes a sealed container filled with a liquid-gas phase change medium. A heat exchanger is located in the lower part of the sealed container and is immersed in the liquid liquid-gas phase change medium. A second heat exchanger is provided in the upper part of the sealed container. The second heat exchanger is not in contact with the liquid liquid-gas phase change medium and is connected to a cold source.

2. The multi-heat source heat exchange device according to claim 1, characterized in that: The temperatures of the multiple heat sources may be the same or different.

3. The multi-heat source heat exchange device according to claim 1, characterized in that: The liquid-gas phase change medium is one of alcohol, ammonia, water, and Freon.

4. The multi-heat source heat exchange device according to claim 1, characterized in that: The cold source is the evaporator of the heat pump unit.

Images