Regional cold supply system and its cold step utilizing method

Abstract

The present invention relates to provides one kind of regional cold supply system, which includes one secondary refrigerated water pipeline with refrigerated water supplying pipe, refrigerated water returning pipe, fresh air cooler and returned air cooler. The fresh air cooler and the returned air cooler are independent, the returned air cooler has water inlet connected to the refrigerated water supplying pipe and water outlet connected to the water inlet of the fresh air cooler, and the fresh air cooler has water outlet connected to the refrigerated water returning pipe. The present invention has increased water supply and water return temperature difference of the secondary refrigerated water pipeline, lowered cold loss, lowered pump power consumption and lowered cost.

Description

technical field [0001] The invention relates to an energy-saving technology for a district cooling system, in particular to a district cooling system and a cascaded utilization method for cooling capacity thereof. Background technique [0002] The per capita share of energy in my country is far below the world average level. At this stage, the demand for energy use in my country is growing rapidly, and the contradiction between supply and demand is acute. The only way to solve my country's current energy dilemma is to use energy scientifically and improve energy utilization efficiency. my country's building energy consumption accounts for 30% of the country's total energy consumption, and the unit energy consumption is much higher than that of developed countries; in building energy consumption, HVAC system energy accounts for 65%, and domestic hot water energy accounts for 15%. The energy saving of HVAC system is the key to building energy savin...

AI Technical Summary

Problems solved by technology

[0005] Although the district cooling system has many advantages, compared with the conventional central air-conditioning system, it has the following energy consumption and cost: the secondary chilled water pipeline of the district cooling system (that is, the chilled water between the central refrigeration station and the user) The cold loss of the transmission pipe network), the energy consumption of the secondary pump, the initial investment of the secondary pipeline and the construction cost

In addition, the economic transportation distance of chilled water is limited due to cold loss and pump energy consumption. At present, the general economic transportation distance is 1.6km

Therefore, for the district cooling system, the cold loss of the chilled water secondary pipeline, the energy consumption of the secondary pump and the initial investment of the secondary pipeline weaken its advantages

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