A multi-energy large temperature difference district cooling device

Abstract

The invention discloses a multi-energy large temperature difference area cooling device, which includes a cooling station, a transmission pipe network and a user end; the cooling station includes a refrigeration system, an energy storage system, a water separator and a water collector; the machine of the refrigeration system The on-board absorption chiller and the on-board centrifugal chiller are connected in series, the inlet of the on-board absorption chiller is connected to the water storage tank and the chilled water return pipe of the water collector respectively through valves, and the outlet of the on-board centrifugal chiller is connected to the chilled water return pipe through valves respectively. The storage tank is connected to the chilled water supply pipe of the water separator; the inlet of the storage tank is respectively connected to the outlet of the onboard centrifugal chiller and the outlet of the cooling end of the water storage cooling plate through valves, and the outlet of the storage tank is respectively connected to the onboard The inlet of the absorption chiller is connected to the inlet of the water-storage cold-supply plate for cooling; the invention can make full use of various energy sources, can apply waste heat refrigeration, realize energy cascade utilization, and improve the primary energy utilization rate.

Description

technical field [0001] The invention relates to the technical field of regional energy combined cooling, heating and power supply, in particular to a multi-energy large temperature difference regional cooling device. Background technique [0002] District cooling is a cooling method that uses centralized large-scale cooling stations to provide chilled water to cooling units within a certain range. Like running water, electricity, and gas, it is a public utility and one of the urban infrastructures. Due to its advantages in energy saving, emission reduction, environmental protection, and operation management, it has won a lot of attention in countries and regions such as Europe and the United States. extensive development. In recent years, many district cooling systems have been put into use in Beijing, Guangzhou, Shanghai, Chongqing, Shaoxing and other cities in my country, meeting people's increasing requirements for quality of life. District cooling (energy) systems are ...

AI Technical Summary

Problems solved by technology

[0004] The main disadvantage of district cooling is the three problems caused by the increase of cold water transportation distance: high energy consumption in transportation; large investment in pipe network; large cooling loss in pipe network

However, this cooling method has the following problems: Due to the limitation of the characteristics of the lithium bromide refrigeration unit itself, the minimum supply temperature of cold water can only reach 7°C

Large temperature difference cooling and low-temperature air supply cannot be realized, and the distance of centralized cooling is limited. In addition, because the temperature difference of cooling is only 5°C (7°C-12°C), the diameter of the cooling pipe network is required Larger, larger initial investment in the pipeline network

The absorption unit itself has low efficiency

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