Top-layer waste heat recovery hot water system

Abstract

The utility model provides a top-layer waste heat recovery hot water system. The top-layer waste heat recovery hot water system comprises a fan assembly, a gas-liquid heat exchange assembly, a water treatment assembly and an electric auxiliary heating assembly. The fan assembly is connected with the gas-liquid heat exchange assembly, hot air on the top layer is input into the gas-liquid heat exchange assembly to exchange heat with low-temperature tap water and then is discharged, and the fan assembly is used for providing power in the process; the electric auxiliary heating assembly serves as a supplementary heat source and is used for heating heat exchange water or low-temperature tap water output by the gas-liquid heat exchange assembly. The water treatment assembly is used for filtering heat exchange water output by the gas-liquid heat exchange assembly or hot water heated by the electric auxiliary heating assembly. The top floor waste heat recovery hot water system has the advantages that waste heat of a top floor is fully utilized, heat use of a heat supply station is reduced, energy-saving benefits are provided for a project, and meanwhile the problem that the top floor of a building is overheated is solved.

Description

Technical Field

[0001] The utility model belongs to the field of waste heat utilization, in particular to a top waste heat recovery hot water system. Background Art

[0002] Currently, the annual completed construction area is about 2 billion m 2 , of which public buildings account for about 400 million m 2 . In the annual energy consumption of public buildings (especially large shopping malls, high-end hotels, high-end office buildings, various large factories, etc.), about 50% to 60% is consumed by air conditioning, cooling and heating systems, and 20% to 30% is used for lighting. Of the energy consumption for air conditioning and heating, about 20% to 50% is consumed by heat transfer of the external envelope structure (about 20% in hot summer and warm winter areas, about 35% in hot summer and cold winter areas, about 40% in cold areas, and about 50% in extremely cold areas). Based on the current situation, these buildings have a total energy saving potential of 50% in terms of envelope structures, heating and air conditioning systems, and lighting, with heating and air conditioning having the greatest energy saving potential.

[0003] In public buildings, most shopping malls and office buildings use glass curtain wall structures to achieve the purpose of beauty and bright areas. On sunny days, sunlight penetrates through the curtain wall into the room, which will cause the indoor temperature of the top floor to be high. In some public buildings, the indoor temperature of the top floor is not only high in summer, but also in winter. Even if the top floor is not heated, it cannot alleviate this phenomenon, and the energy station of public buildings cannot meet the heating and cooling requirements at the same time. At present, in summer, it is generally adopted to increase the supply of cold air to offset the heat load, or to discharge it centrally through dome exhaust, or to use film to insulate. In winter, it is generally adopted to open windows to allow outdoor cold air to enter the room to offset the heat load, or to turn on the air conditioning unit to turn off the heating coil, open the fresh air valve to inhale fresh air and mix it with the return air with higher temperature to achieve the purpose of lowering the indoor temperature. The above methods can alleviate the phenomenon of overheating on the top floor in winter / summer to a certain extent, but this part of the heat is not used, resulting in a certain degree of waste. Utility Model Content

[0004] In view of this, the utility model aims to propose a top floor waste heat recovery hot water system, which uses the waste heat in the hot air on the top floor for hot water production through a gas-liquid heat exchanger. The heated water can be used for domestic hot water after purification by a water treatment device, and the hot air that has lost heat is sent to the air conditioning unit as return air again, mixed with fresh air, and sent to the room after treatment, thereby alleviating the phenomenon of overheating on the top floor. In order to ensure that the temperature of domestic hot water meets the normal needs of personnel, an electric auxiliary heating device is added to the system to replenish heat in time.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A top-layer waste heat recovery hot water system comprises a fan assembly, a gas-liquid heat exchange assembly, a water treatment assembly and an electric auxiliary heating assembly;

[0007] The fan assembly is connected to the gas-liquid heat exchange assembly. The hot air on the top layer is input into the gas-liquid heat exchange assembly for heat exchange with low-temperature tap water and then discharged. The fan assembly provides power during the process.

[0008] The electric auxiliary heating component is used as a supplementary heat source to heat the hot water or low-temperature tap water output by the gas-liquid heat exchange component;

[0009] The water treatment component is used to filter the hot water output by the gas-liquid heat exchange component or the hot water heated by the electric auxiliary heating component.

[0010] Further, the fan assembly includes an air inlet, an air inlet duct, a fan and a top-layer temperature monitoring device;

[0011] The top floor temperature monitoring device is arranged at the air inlet of the air inlet duct to monitor the air inlet temperature of the hot air at the top floor;

[0012] The air inlet is connected to the air inlet of the gas-liquid heat exchange component through an air inlet duct;

[0013] The fan is arranged on the air inlet duct to provide power.

[0014] Furthermore, the gas-liquid heat exchange component includes a gas-liquid heat exchanger, the air inlet of the gas-liquid heat exchanger is connected to the air inlet through an air inlet duct, and a heat exchange structure is arranged in the gas-liquid heat exchanger;

[0015] Low-temperature tap water enters from the water inlet above the gas-liquid heat exchanger and exchanges heat with the hot air on the top layer through the heat exchange structure;

[0016] An air outlet is arranged on the top of the gas-liquid heat exchanger, and the hot air on the top layer is discharged through the air outlet after passing through the heat exchange structure and exchanging heat with low-temperature tap water.

[0017] Furthermore, low-temperature tap water enters from the water inlet above the gas-liquid heat exchanger through a water inlet pipe, and a first electric regulating valve is provided on the water inlet pipe.

[0018] Furthermore, a water collecting pan is provided at the bottom of the gas-liquid heat exchanger, and the low-temperature tap water after heat exchange with the hot air on the top layer through the heat exchange structure becomes hot water, which falls into the water collecting pan at the bottom for collection.

[0019] Furthermore, the heated water in the water collection tray is connected to an outlet pipe through the outlet of the gas-liquid heat exchanger and discharged to the outside, and a hot water temperature monitoring device is provided on the side of the outlet pipe close to the outlet.

[0020] Furthermore, the water outlet pipe includes a first water outlet pipe, through which the hot water flows into the water treatment component, the water treatment component includes a water treatment device, and the hot water is treated by the water treatment device and then discharged for use by users.

[0021] Furthermore, the water outlet pipe includes a second water outlet pipe, and the exchange water flows into the electric auxiliary heating component through the second water outlet pipe. The electric auxiliary heating component includes an electric auxiliary heater, and the electric auxiliary heater is used to heat the exchange water to form heated hot water, which then flows into the water treatment component;

[0022] A third electric regulating valve is arranged on the second water outlet pipe.

[0023] Furthermore, low-temperature tap water flows into the electric auxiliary heater through the underground water pipe, and the electric auxiliary heater heats the low-temperature tap water to form heated hot water, which then flows into the water treatment component;

[0024] A second electric regulating valve is arranged on the underground water pipeline.

[0025] Furthermore, it includes a control device, which includes a PLC controller. The top temperature monitoring device and the hot water temperature monitoring device are connected to the PLC controller. The first electric regulating valve, the second electric regulating valve, and the third electric regulating valve are connected to the PLC controller.

[0026] Compared with the prior art, the top floor waste heat recovery hot water system described in the utility model has the following beneficial effects:

[0027] (1) The top floor waste heat recovery hot water system described in the utility model fully utilizes the waste heat of the top floor, reduces the heat usage of the heating station, and provides energy-saving benefits to the project;

[0028] (2) The top floor waste heat recovery hot water system described in the utility model alleviates the problem of overheating on the top floor of the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0030] Figure 1 This is a schematic diagram of a top-layer waste heat recovery hot water system described in an embodiment of the utility model.

[0031] Description of reference numerals:

[0032] 1-air inlet; 2-top floor temperature monitoring device; 3-fan; 4-gas-liquid heat exchanger; 5-first electric regulating valve; 6-second electric regulating valve; 7-third electric regulating valve; 8-hot water temperature monitoring device; 9-electric auxiliary heater; 10-water treatment device; 11-control device; 12-air outlet. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0034] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0035] The utility model provides a top-floor waste heat recovery hot water system, including: a fan component, a gas-liquid heat exchange component, a water treatment component and an electric auxiliary heating component. The fan component provides power for the loop, is connected to the gas-liquid heat exchange component, and is responsible for the transmission and distribution of hot air before and after the heat exchange. Based on this component, the system fully utilizes the heat of the top floor while ensuring the balance of the air volume sent back to the top floor. As one of the core components of the system, the gas-liquid heat exchange component is mainly responsible for the heat exchange between the hot air on the top floor and the low-temperature water to achieve the production of domestic hot water. The electric auxiliary heating component serves as a supplementary heat source to supplement the heat when it is insufficient. In order to ensure that the produced hot water meets the water quality requirements and can be used as domestic water, a water treatment component is specially added to the system. Other layer components include a top-floor temperature monitoring device, a hot water temperature monitoring device, and an operation control device.

[0036] Through the above components, the fan component and the gas-liquid heat exchange component are connected through pipelines, and the fan component matches the power for the pipeline to realize the downward release of hot air from the top floor and the upward return of cold air, thereby preventing negative pressure in the top floor. The gas-liquid heat exchange component is used to realize the production of hot water. In this component, the hot air from the top floor is fully exchanged with low-temperature water so that its temperature can meet the demand for water in daily life. In order to ensure the stability of the temperature, an additional electric auxiliary heating component is matched to supplement the heat when the heat is not enough to meet the demand. The utility model utilizes the heat accumulated in the top floor, that is, lowers the temperature of the top floor to ensure the comfort of the indoor environment, and at the same time recycles this part of the heat, which not only solves the problem of overheating on the top floor of public buildings, but also achieves the purpose of saving energy.

[0037] The control device 11 is an intelligent control box with a screen for data collection, cleaning and control. It can be realized by using an existing controller, such as Siemens S7 series or Mitsubishi FX series controllers. The control principle of the control device is the existing technology and this scheme is not repeated. The switch state of each pipeline is controlled by opening and closing the first electric regulating valve 5, the second electric regulating valve 6 and the third electric regulating valve 7 with fine control scales in the pipeline. The control device is mainly used for collecting relevant data of the top temperature monitoring device 2 and the hot water temperature monitoring device 8, as well as controlling the gas-liquid heat exchange component 4 and the electric auxiliary heating component 9. The above-mentioned collection and control are common functions of the existing PLC controller and do not involve improvements to the computer program.

[0038] The fan assembly comprises an air inlet 1, a top-layer temperature monitoring device 2, a fan 3 and a connecting air duct.

[0039] The gas-liquid heat exchange assembly includes a gas-liquid heat exchanger 4 and a hot water temperature monitoring device 8. The hot air from the top layer enters from the bottom of the gas-liquid heat exchanger 4 and flows from bottom to top under the guidance of the internal fan, while the low-temperature tap water enters from the top of the gas-liquid heat exchanger 4 and falls into the bottom water collection tray in the form of spray. The hot air and the low-temperature water realize heat exchange in the gas-liquid heat exchanger 4, and a filler is provided in the middle of the gas-liquid heat exchanger 4 to ensure the adequacy of the heat exchange. The low-temperature air after heat exchange is discharged from the top of the gas-liquid heat exchanger 4, and the high-temperature hot water flows out from the drain port near the water collection tray.

[0040] Top-floor temperature monitoring device: uses an existing temperature sensor to monitor the temperature data of the top-floor air extracted by the fan.

[0041] Hot water temperature monitoring device: uses the existing temperature sensor to monitor the temperature data of the hot water produced after gas-liquid heat exchange.

[0042] Supply air duct and return air duct: Double-sided color steel plate composite air duct, the inner and outer thickness of the double-sided color steel plate is 0.3mm, and the sandwich insulation material is non-combustible Class A centrifugal glass wool to ensure the air flow temperature.

[0043] In another embodiment, based on the device mentioned in this solution, an example of an operation mode is provided:

[0044] When the room temperature exceeds 33℃, it is generally considered a high temperature environment. Therefore, this temperature is used as the criterion for determining whether the top floor waste heat recovery is required. The water supply temperature for domestic water is generally 45℃, and this condition will also be used as one of the criteria for determining the operating mode.

[0045] When the top-floor temperature monitoring device detects that the top-floor air temperature is higher than 33°C, it means that the top floor is overheated. The hot air on the top floor can be used as a heat source to produce domestic hot water. At the same time, the hot water temperature data in the hot water temperature monitoring device is read. When it is lower than 45°C, the electric auxiliary heating is turned on in time to supplement the heat. The corresponding operation mode and switching conditions are shown in the following table;

[0046]

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A top floor waste heat recovery hot water system, characterized by: Including fan components, gas-liquid heat exchange components, water treatment components and electric auxiliary heating components; The fan assembly is connected to the gas-liquid heat exchange assembly; The electric auxiliary heating component is used as a supplementary heat source to heat the hot water or low-temperature tap water output by the gas-liquid heat exchange component; The water treatment component is used to filter the hot water output by the gas-liquid heat exchange component or the hot water heated by the electric auxiliary heating component.

2. A top floor waste heat recovery hot water system according to claim 1, characterized in that: The fan assembly includes an air inlet (1), an air inlet duct, a fan (3) and a top-layer temperature monitoring device (2); The top-layer temperature monitoring device (2) is arranged at the air inlet (1) of the air inlet duct and is used to monitor the air inlet temperature of the hot air at the top layer; The air inlet (1) is connected to the air inlet of the gas-liquid heat exchange component through an air inlet duct; The fan (3) is arranged on the air inlet duct and is used to provide power.

3. A top floor waste heat recovery hot water system according to claim 2, characterized in that: The gas-liquid heat exchange component comprises a gas-liquid heat exchanger (4), the air inlet of the gas-liquid heat exchanger (4) is connected to the air inlet (1) via an air inlet duct, and a heat exchange structure is arranged in the gas-liquid heat exchanger (4); Low-temperature tap water enters from the water inlet above the gas-liquid heat exchanger (4) and exchanges heat with the hot air on the top layer through the heat exchange structure; An air outlet is arranged at the top of the gas-liquid heat exchanger (4), and the hot air at the top layer is discharged through the air outlet after passing through the heat exchange structure and exchanging heat with low-temperature tap water.

4. A top floor waste heat recovery hot water system according to claim 3, characterized in that: Low-temperature tap water enters from the water inlet above the gas-liquid heat exchanger (4) through a water inlet pipe, and a first electric regulating valve (5) is provided on the water inlet pipe.

5. The top floor waste heat recovery hot water system according to claim 3, characterized in that: A water collecting tray is arranged at the bottom of the gas-liquid heat exchanger (4).

6. A top floor waste heat recovery hot water system according to claim 5, characterized in that: The heated water in the water collection tray is connected to a water outlet pipe through a water outlet of the gas-liquid heat exchanger (4) and discharged to the outside. A hot water temperature monitoring device (8) is provided on the side of the water outlet pipe close to the water outlet.

7. A top floor waste heat recovery hot water system according to claim 6, characterized in that: The water outlet pipe comprises a first water outlet pipe, through which the exchange water flows into the water treatment component, the water treatment component comprises a water treatment device (10), and the exchange water is treated by the water treatment device (10) and then discharged for use by users.

8. The top floor waste heat recovery hot water system according to claim 6, characterized in that: The water outlet pipeline includes a second water outlet pipeline, and the exchange water flows into the electric auxiliary heating component through the second water outlet pipeline, and the electric auxiliary heating component includes an electric auxiliary heater (9); A third electric regulating valve (7) is arranged on the second water outlet pipe.

9. The top floor waste heat recovery hot water system according to claim 1, characterized in that: Low-temperature tap water flows into the electric auxiliary heater (9) through an underground water pipeline; A second electric regulating valve (6) is arranged on the underground water pipeline.

10. The top floor waste heat recovery hot water system according to claim 1, characterized in that: The control device (11) includes a PLC controller. The top temperature monitoring device (2) and the hot water temperature monitoring device (8) are connected to the PLC controller. The first electric regulating valve (5), the second electric regulating valve (6) and the third electric regulating valve (7) are connected to the PLC controller.

Images