Asymmetric balanced energy-saving and environment-friendly power station architecture

Abstract

An asymmetrical balance energy-saving environment-friendly power station framework comprises a cold and heat combined supply horizontal plate exchange module unit, a low-temperature freezing module unit, a heat tank and a cooling capacity tank, the cold and heat combined supply horizontal plate exchange module unit is of an asymmetrical balance structure, and the heating capacity of a heating end condenser is determined according to the amount of needed heat; the refrigerating capacity of a heating end evaporative condenser is matched with the refrigerating capacity of a refrigerating end evaporator, the cold energy which cannot be met by the cold and heat combined supply horizontal plate exchange module unit is supplemented by a low-temperature freezing module unit, a boiler and a high-temperature heat pump are not used in the structure, the comprehensive energy efficiency of the system is the highest, all devices are electrically driven, fossil energy is not combusted, and CO2 emission is avoided.

Description

Technical Field

[0001] This invention relates to the field of high-temperature heating and low-temperature cooling, and more particularly to the field of simultaneous cooling and heating. Background Technology

[0002] In food, beverage, pharmaceutical, and chemical production lines, both high-temperature sterilization and low-temperature cooling are required. Currently, high-temperature sterilization often uses steam boilers for heating, while low-temperature cooling often uses cryogenic refrigerators. These two systems are completely independent, resulting in low overall energy utilization. Furthermore, boilers burn fossil fuels, which emit CO2 into the environment, failing to save energy and reduce carbon emissions. Many manufacturers are trying to replace boilers with high-temperature heat pumps, which solves the CO2 emission problem, but the overall energy efficiency is still low. A patent for an industrial dual-efficiency power station architecture, patent authorization announcement number CN213873358U, proposes a power station architecture, but its efficiency still needs to be improved. Summary of the Invention

[0003] To address the issues of carbon reduction and improved overall energy efficiency in the prior art, this invention proposes an asymmetric balance energy-saving and environmentally friendly power station architecture. The core equipment of this architecture adopts a combined cooling and heating horizontal plate heat exchanger module unit. Depending on the required temperatures of the cold and heat sources, a cascade two- or three-stage compression technology is used. All evaporators, condensers, and evaporative condensers in the compression cycle are horizontal plate heat exchangers. The evaporative condenser absorbs all the heat released from the condensation of the previous stage into the medium of the next stage, thereby improving energy efficiency.

[0004] The cooling and heating horizontal plate heat exchanger module unit forms an asymmetrical structure between the cooling and heating ends. The portion of cooling capacity provided by the combined cooling and heating horizontal plate heat exchanger module unit that is insufficient is supplemented by low-temperature refrigeration module units to achieve a balance between supply and demand.

[0005] The heat generated at the heating end of the combined cooling and heating horizontal plate heat exchanger module unit is first transferred to the heat tank, and then the heat tank provides the material with high-temperature sterilization. The cold energy generated at the cooling end of the combined cooling and heating horizontal plate heat exchanger module unit and the cold energy generated by the low-temperature refrigeration module unit are first transferred to the cold energy tank, and then the cold energy tank provides the material with cooling after sterilization.

[0006] For specific projects requiring both cold and heat sources, an asymmetric balanced energy-saving and environmentally friendly power station architecture is implemented by following these steps:

[0007] The first step is to match the heating capacity of the condenser at the heating end of the combined cooling and heating horizontal plate heat exchanger module unit with the total heat demand.

[0008] The second step is to decide whether to use two-stage or three-stage compression based on the temperature difference between using cold and hot air.

[0009] The third step is to match the cooling capacity of the next stage of the combined cooling and heating horizontal plate heat exchanger module unit according to the amount of heat absorbed by the high-temperature stage evaporator and condenser, and then match the cooling capacity of the last stage low-temperature evaporator.

[0010] The fourth step is to use the difference between the total cooling capacity and the low-temperature cooling capacity to determine the load borne by the low-temperature refrigeration module unit.

[0011] The fifth step is to determine the size of the heat tank based on the circulation flow rate at the heating end of the combined cooling and heating horizontal plate heat exchanger module unit.

[0012] Step 6: Determine the size of the cooling tank based on the total circulation flow of the cooling end of the combined cooling and heating horizontal plate heat exchanger module unit and the low-temperature refrigeration module unit.

[0013] A closed-loop energy transfer and conversion mode is formed between the power station and the materials that require high-temperature sterilization and low-temperature cooling.

[0014] Beneficial effects

[0015] In the asymmetric balanced energy-saving and environmentally friendly power station, the combined cooling and heating (CCHP) horizontal plate heat exchanger module unit handles all the heat required in the project. The heat absorbed by the cooling unit during cooling is transferred step-by-step to the heating unit through the next stage of evaporator-condenser, where it is completely absorbed and not emitted to the outside. Any shortfall in cooling capacity provided by the CCHP horizontal plate heat exchanger module unit is supplemented by a low-temperature refrigeration module unit. This eliminates the need for boilers and high-temperature heat pumps, resulting in the highest overall system energy efficiency. All equipment is electrically driven, eliminating the combustion of fossil fuels and thus preventing CO2 emissions. Attached Figure Description

[0016] Figure 1 Power station architecture flowchart

[0017] Figure 2 Cold source and heat source system distribution diagram

[0018] The components include: 1. Horizontal plate heat exchanger module unit for combined cooling and heating; 2. Low-temperature refrigeration module unit; 3. Cooling end of horizontal plate heat exchanger module unit for combined cooling and heating; 4. First intermediate section of horizontal plate heat exchanger module unit for combined cooling and heating; 5. Second intermediate section of horizontal plate heat exchanger module unit for combined cooling and heating; 6. Heating end of horizontal plate heat exchanger module unit for combined cooling and heating; 7. Heat tank; 8. Materials requiring heating and cooling; 9. Cold storage tank. Detailed Implementation

[0019] The application of this invention is illustrated by taking the provision of 0°C cold fluid and 125°C hot fluid, with the required cooling capacity and heating capacity both being Q.

[0020] First, the heating capacity of the condenser in the heating end 6 of the combined cooling and heating horizontal plate heat exchanger module unit is determined based on the heating capacity Q. This yields the heat absorption of the high-temperature stage evaporation. Then, based on this heat absorption, the heat release of the evaporator-condenser in the first intermediate section 4 of the combined cooling and heating horizontal plate heat exchanger module unit is calculated. From the heat release of the first intermediate section, the heat absorption of the evaporator-condenser in the second intermediate section 5 is determined. Finally, the cooling capacity of the evaporator in the cooling end 3 of the combined cooling and heating horizontal plate heat exchanger module unit is determined. If the heating capacity at the high-temperature end of one combined cooling and heating horizontal plate heat exchanger module unit cannot meet the total heat demand, multiple modules can be connected in parallel. The number of low-temperature refrigeration modules is then matched based on the difference between the total low-temperature cooling capacity of the multiple combined cooling and heating horizontal plate heat exchanger module units and the total required cooling capacity. In this case, the combined cooling and heating horizontal plate heat exchanger module units handle 100% of the total heating capacity and approximately 50% of the total cooling capacity, while the low-temperature refrigeration modules handle approximately 50% of the total cooling capacity, achieving a balance between supply and demand and maximizing overall energy efficiency.

[0021] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. An asymmetric balanced energy-saving and environmentally friendly power station architecture, comprising a combined cooling and heating horizontal plate heat exchanger module unit, a low-temperature refrigeration module unit, a heat tank, and a cold storage tank, characterized in that: The combined cooling and heating horizontal plate heat exchanger module unit adopts an asymmetric balance structure. The heating capacity of the heating end condenser is determined by the amount of heat required, and the cooling capacity of the cooling end evaporator condenser is matched with that of the cooling end evaporator condenser. The cooling capacity that the combined cooling and heating horizontal plate heat exchanger module unit cannot meet is supplemented by the low-temperature refrigeration module unit, so that the power station has the highest overall energy efficiency.

2. The combined cooling and heating horizontal plate heat exchanger module unit according to claim 1, adopts a cascade two-stage or three-stage compression technology according to the different temperatures of the required cold source and heat source. All evaporators, condensers and evaporative condensers in the compression cycle adopt horizontal plate heat exchangers. The evaporative condenser absorbs all the heat released by the condensation of the previous stage into the medium of the next stage.

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