CN204987576U - Energy -conserving transmission and distribution system of hierarchical formula self -loopa water resource heat pump regional energy - Google Patents

Abstract

The utility model discloses a hierarchical self-circulating water source heat pump regional energy-saving transmission and distribution system. The water flows through the water intake pump and enters the water source heat pump host from the water intake pipe; The pipeline is sent to the user side; two-way valve 1, one-way valve one, regulating valve and one-way valve two, two-way valve two are installed in parallel on the user side; the flow directions of one-way valve one and one-way valve two are oppositely set; Set cooling water pump and heat exchanger separately at each user end. The utility model overcomes the shortcomings of the traditional regional energy transmission and distribution system, such as the most unfavorable pipeline circulation energy consumption and the defect that self-circulation cannot be realized, and realizes the whole system by using a combination of two two-way valves, one-way valves and regulating valves. The self-circulation function, according to the actual energy demand of each energy-consuming unit, matches the pumps in stages, effectively reducing the energy consumption of the system.

Description

A hierarchical self-circulating water source heat pump district energy-saving transmission and distribution system

technical field

The utility model belongs to the field of fluid area energy supply, in particular to a hierarchical self-circulating water source heat pump area energy-saving transmission and distribution system.

Background technique

At present, most water source heat pump regional energy transmission and distribution systems follow the more traditional transmission and distribution model, which mainly includes water intake and drainage parts, water source heat pump units, circulating water pumps and user terminals, etc., as shown in Figure 1. The arrows in the figure indicate water flow direction. The source water enters the main unit of the water source heat pump through the water intake pump, and realizes internal circulation through the circulation pump in the machine room. The differential pressure bypass valve plays the role of adjusting the pressure of the entire system to ensure the stability of the system. Each user end is equipped with a balance valve to regulate the flow of the user end. The intake and drainage, the water source heat pump room, and the user end form a complete regional energy transmission and distribution system.

There are defects in the transmission and distribution system using this mode. The circulating water pump is installed in the machine room and is responsible for the circulation of the entire system water flow. Large, energy consumption increases, and the energy efficiency ratio of the entire energy supply system decreases. When the system load is small, the self-circulation operation cannot be completed, resulting in energy waste.

Utility model content

In view of the above problems, in order to ensure that the transmission and distribution system has relatively high energy efficiency, reduced energy consumption, and reduced water pump head, and avoids problems such as large water pump head, large power, and high energy consumption, the utility model provides a hierarchical self-circulating water source heat pump zone The energy-saving transmission and distribution system can realize self-circulation on the user side.

The technical scheme of the utility model is as follows: a hierarchical self-circulating water source heat pump regional energy-saving transmission and distribution system, including water intake pipes, water return pipes, water intake pumps, water source heat pump hosts, air-conditioning side delivery pipes, air-conditioning side primary circulation pumps, Two-way valve one, one-way valve one, regulating valve, one-way valve two, two-way valve two, cooling water pump;

The water flow enters the water source heat pump main unit from the water intake pipe through the water intake pump; after being processed by the water source heat pump main unit, the primary circulation pump on the air conditioner side sends water to the user side through the air conditioner side delivery pipe;

Two-way valve 1, one-way valve one, regulating valve and one-way valve two, two-way valve two are set in parallel on the user side; the flow directions of one-way valve one and one-way valve two are oppositely set;

Set cooling water pump and heat exchanger separately at each user end.

The hierarchical self-circulating water source heat pump regional energy-saving transmission and distribution system of the utility model includes two self-circulating systems. During the circulation process, the regulating valve, one-way valve two and two-way valve two are in the closed state; the second is the self-circulation system on the user side, which consists of the user-side water inlet pipe, one-way valve two, and two-way valve The two-way valve two and the water return pipeline are composed. During the cycle, the two-way valve one, one-way valve one and the regulating valve are in the closed state. In addition, in any self-circulation process, the flow of the whole system can be regulated through the regulating valve.

The beneficial effects of the utility model are as follows:

(1) The traditional water source heat pump regional energy transmission and distribution system realizes circulation through the water pump installed in the machine room, and the corresponding water pump is not installed on the user side. The system can only realize one kind of circulation, but two sets of two-way valves, one-way valves and After regulating the valve, when the demand on the user side is low or there is no demand, the machine room can realize self-circulation through the positive two-way valve. When the machine room is not running, the user side can realize self-circulation through the secondary water pump and the reverse two-way valve, thereby reducing the start-up time of the main engine and saving energy.

(2) Hierarchical transmission and distribution mode. The traditional water source heat pump regional energy transmission and distribution system operates through a group of water pumps, and other branches are regulated by balancing valves. The system water pumps are designed according to the maximum flow rate and the most unfavorable lift of the entire system. Under partial load conditions, energy is seriously wasted. In the hierarchical transmission and distribution system, the primary side water pump only realizes self-circulation in the machine room, and the power is low. The secondary side pumps are designed in stages according to the load size and distance of each energy-consuming unit to meet their respective needs, thereby reducing energy consumption and system loss.

(3) The traditional water source heat pump regional energy transmission and distribution system does not have the self-circulation structure composed of two-way valve, one-way valve and regulating valve in Figure 2. This part is also different from the ordinary fluid delivery system. The self-circulation part is combined with The combination of water source heat pump regional energy transmission and distribution system has completely changed the traditional transmission and distribution system, and the energy efficiency ratio of the system has been greatly increased.

(4) The hot (cold) water flowing into the plate heat exchanger will pass through the two-way valve, one-way valve, and regulating valve. This part is equivalent to the entire user-side control system, through the control system with self-circulation function The water pumps are matched in stages, but the traditional water source heat pump regional energy transmission and distribution system is relatively simple, the water flow on the user side cannot realize self-circulation, and there is also a lack of a control system that affects the energy efficiency ratio of the entire system. The user-side water flow control system composed of two-way valves, one-way valves, and regulating valves is very important for the entire hierarchical water source heat pump district energy transmission and distribution system.

Description of drawings

Figure 1 is a schematic diagram of the traditional water source heat pump district energy transmission and distribution system

Fig. 2 is a structural schematic diagram of the hierarchical self-circulating water source heat pump regional energy saving transmission and distribution system of the utility model

Explanation of reference numbers

Water intake pipeline 1, water intake pump 2, water source heat pump host 3, air conditioner side delivery pipeline 4, air conditioner side primary circulation pump 5, two-way valve 1 6, one-way valve 1 7, regulating valve 8, one-way valve 2 9, two Through valve two 10, cooling water pump 11, plate heat exchanger 12, return water pipeline 13.

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings. As shown in Figure 2, a hierarchical self-circulating water source heat pump regional energy-saving transmission and distribution system includes a water intake pipeline 1, a water return pipeline 13, a water intake pump 2, and a water source heat pump host 3 , air conditioner side conveying pipeline 4, air conditioner side primary circulation pump 5, two-way valve one 6, one-way valve one 7, regulating valve 8, one-way valve two 9, two-way valve two 10, cooling water pump 11;

As shown in Figure 2, the arrow represents the direction of water flow, the solid line represents the direction of water inflow, and the dotted line represents the direction of water retreat. The water flows through the water intake pump 2 and enters the water source heat pump main unit 3 from the water intake pipe 1. After being processed by the water source heat pump main unit 3, high-temperature water or low-temperature water enters the user side through the first-stage circulation pump on the air-conditioning side and from the air-conditioning side delivery pipe 4 to the user side. Separately set cooling water pump 11 and plate heat exchanger 12 at the end;

Two-way valve one 6, one-way valve one 7, regulating valve 8, one-way valve two 9, and two-way valve two 10 are set in parallel on the user side; the flow directions of one-way valve one 7 and one-way valve two 9 are oppositely set ;

On the user side, self-circulation is realized through the two-way valve 6, the one-way valve 7 and the regulating valve 8, and then the high-temperature or low-temperature water is delivered to the plate heat exchanger 10 corresponding to each user side through the user-side cooling water pump 9 Provide heat (cold) for the user, after the energy supply process is realized, the water flows through the water return pipeline 11 to realize the water return.

The hierarchical self-circulating water source heat pump regional energy-saving transmission and distribution system includes two self-circulating systems. The first is the self-circulation system of the main engine of the water source heat pump. This system is composed of the air-conditioning side delivery pipe 4, the two-way valve 6, the one-way valve 7 and the water return pipe. During the cycle, the regulating valve 8, the one-way valve 9 and the two-way The valve 10 is in the closed state; the second is the self-circulation system on the user side, which is composed of the user-side water inlet pipe, the one-way valve 9, the two-way valve 10 and the water return pipe. Directional valve 7 and regulating valve 8 are in closed state. In addition, in any self-circulation process, the flow of the whole system can be regulated by the regulating valve 8 .

The hierarchical self-circulating water source heat pump regional energy-saving transmission and distribution system overcomes the disadvantages of the traditional regional energy transmission and distribution system, which are based on the most unfavorable pipeline cycle, which consumes a lot of energy and cannot realize self-circulation. By using two two-way valves and one-way valves The combination of the control valve and the self-circulation function of the whole system realizes the self-circulation function of the whole system. According to the actual energy demand of each energy-consuming unit, the water pumps are matched in stages to effectively reduce the energy consumption of the system.

The above is an exemplary description of the utility model. Obviously, the realization of the utility model is not limited by the above-mentioned method, as long as various improvements in the technical solution of the utility model are adopted, or the concept of the utility model is implemented without improvement. And technical schemes that are directly applied to other occasions are all within the protection scope of the present utility model.

Claims (2)

1. A hierarchical self-circulating water source heat pump regional energy-saving transmission and distribution system, characterized in that it includes water intake pipes, water return pipes, water intake pumps, water source heat pump hosts, air-conditioning side delivery pipes, air-conditioning side primary circulation pumps, two-way Valve 1, one-way valve one, regulating valve, one-way valve two, two-way valve two, cooling water pump; The water flow enters the water source heat pump main unit from the water intake pipe through the water intake pump; after being processed by the water source heat pump main unit, the primary circulation pump on the air conditioner side sends water to the user side through the air conditioner side delivery pipe; Two-way valve 1, one-way valve one, regulating valve and one-way valve two, two-way valve two are set in parallel on the user side; the flow directions of one-way valve one and one-way valve two are oppositely set; Set cooling water pump and heat exchanger separately at each user end. 2. A hierarchical self-circulating water source heat pump regional energy saving transmission and distribution system according to claim 1, characterized in that the heat exchanger is a plate heat exchanger.