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Efficient regional energy station

An energy station and regional technology, applied in refrigeration, air-conditioning system integration, and power generation, can solve problems such as inability to supply heat, high heating cost, and high cost, and achieve the effect of improving system energy efficiency and reducing energy costs

Pending Publication Date: 2022-05-10
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chillers have high cooling efficiency, but cannot supply heat; water source / ground source / energy tower heat pump units can provide both cooling and heating, but the cold and heat are unbalanced in winter and summer, and the cost is high; lithium bromide absorption heat pump units need to be driven by gas or flue gas , and low energy efficiency; the cooling and heating efficiency of air source heat pump units is relatively low; the heat source of regional energy mainly comes from boilers, water source / ground source / energy tower heat pump units, and air source heat pump units
The heat utilization efficiency of boiler heating is low, the heating cost of water source / ground source / energy tower heat pump unit is high, and the heating efficiency of air source heat pump unit is not high; the power source of regional energy mainly comes from municipal power grid, gas generator set and solar power generation system
The electricity price of the municipal power grid is high; the efficiency of gas generators alone is low; solar power generation is unstable and decreases with the increase of outdoor temperature

Method used

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  • Efficient regional energy station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 - Photovoltaic power generation + cooling mode in summer

[0019] This mode is mainly used in the time period when the regional energy station has relatively little demand for cooling capacity, such as initial cooling or final cooling. The main modes of operation of this mode are as follows:

[0020] The chilled water at 12°C returns to the water collector 2 from the end of the user, and then flows into the inlet of the first user water pump 4 . In cooling mode, A1 valve A-1, A2 valve A-2, A3 valve A-3, A4 valve A-4 open, B1 valve B-1, B2 valve B-2, B3 valve B-3, B4 valve B -4 closes, E1 valve E-1 opens, E2 valve E-2 closes. The chilled water is pressurized by the first user water pump 4 and reaches the inlet of the first evaporator 5-1 of the heat pump unit 5 through the A1 valve A-1. The chilled water temperature is reduced to 7°C and then enters the water separator 1 through the A3 valve A-3 The chilled water at 7°C in the water separator 1 is supplied t...

Embodiment 2

[0024] For better cooling, on the basis of Example 1, a three-channel plate exchange is added. In summer, the excess heat is dissipated through buried pipes, river water, and towers. The cooling mode is different from Example 1. In photovoltaic power generation The operation of the upper unit is the same as that of Embodiment 1: the refrigeration mode of this embodiment is as follows:

[0025] The chilled water at 12°C returns to the water collector 2 from the end of the user, and then flows into the inlet of the first user water pump 4 . In cooling mode, A1 valve A-1, A2 valve A-2, A3 valve A-3, A4 valve A-4 open, B1 valve B-1, B2 valve B-2, B3 valve B-3, B4 valve B -4 is closed, the E1 valve E-1 is closed, the E2 valve E-2 is opened, the chilled water is boosted by the first user water pump 4 and reaches the inlet of the first evaporator 5-1 of the heat pump unit 5 through the A1 valve A-1, After the temperature of the chilled water drops to 7°C, it enters the water separat...

Embodiment 3

[0026] Example 3 - Summer Gas Power Generation + Photovoltaic Power Generation + Cooling Mode

[0027] This mode is mainly used in time periods when regional energy stations have relatively large demand for cooling capacity and electricity consumption, such as cooling peak hours. The main operation mode of this mode is the gas-fired generator set on the basis of embodiment 1 or embodiment 2. The following is based on embodiment 1 or embodiment 2. The increased operation mode is as follows:

[0028]The electric energy generated by the gas generator set 9 drives each energy-consuming equipment of the regional energy station 6 . The 40°C intercooled water is boosted by the intercooled water pump 13 to the intercooled water-cooled plate exchange 10, where it exchanges heat with the water in the energy tower 6, and enters the gas generator set 10 after the temperature drops to 35°C. After the temperature rises to 40°C, it enters the intercooling water pump 13. Complete heat dissi...

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Abstract

According to the efficient regional energy station, in summer, heat generated by smoke waste heat recovery and cylinder sleeve cooling can drive the smoke type lithium bromide unit, and therefore refrigeration in summer is achieved; in winter, heat generated by cylinder sleeve cooling can be directly used for heating, and meanwhile heat generated by intercooling water cooling can serve as a low-temperature heat source to be released into an energy tower, so that the evaporation temperature of a heat pump unit is increased, and the heating energy efficiency of a main engine is improved. The heat pump unit comprehensively absorbs waste heat of the river water side, the buried pipe side, the energy tower side and the gas generator set, so that efficient heating in winter is achieved, redundant heat is dissipated through the buried pipe, the river water and the tower in summer, and efficient cooling in summer is achieved. The concentration of the solution in the energy tower in winter can be controlled by introducing solar heat and waste heat of the gas generator set. The system is dominated by multi-energy complementation and comprehensive utilization of energy, the advantages of all devices are fully utilized, the disadvantages of all the devices are overcome, and therefore the lowest energy consumption of the system is achieved.

Description

technical field [0001] The invention belongs to the technical field of power generation, refrigeration and air conditioning system integration. It relates to an energy station, in particular to a high-efficiency regional energy station taking into account power generation, cooling and heating. Background technique [0002] With the rapid development of urbanization, regional centralized energy supply and comprehensive utilization are becoming more and more important. It is of great significance to the country to use multi-energy complementarity for the supply of cold, heat and electricity in urban areas, and to minimize energy consumption in cities. [0003] At present, the cold sources of regional energy mainly come from water chillers, water source / ground source / energy tower heat pump units, lithium bromide absorption refrigeration units, and air source heat pump units, but each has its own advantages and disadvantages. Chillers have high cooling efficiency, but cannot s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24D3/02F24D3/10F24D3/18F24D18/00F24D19/10F25B15/06F25B27/02F24D101/10F24D101/40
CPCF24D3/02F24D3/1066F24D3/18F24D19/1072F25B15/06F25B27/02Y02A30/274Y02B10/20Y02B10/70Y02B30/625
Inventor 文先太曹先齐余鹏飞陈涛张君张钊
Owner NANJING INST OF TECH
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