Energy storage compensation type heat pump or air conditioner

Abstract

The invention discloses an energy storage compensation type heat pump or air conditioner. The system main body is an air source heat pump or air conditioner, at least comprises a source side condensation-evaporation device (1), and is characterized in that the source side condensation-evaporation device (1) comprises a main heat exchanger (2) and an auxiliary heat exchanger (4), and comprises an energy accumulation module (3); and the energy accumulation module (3) comprises an energy accumulator, an input heat exchanger (6) and an output heat exchanger (5). Since the auxiliary heat exchange circulation improves the heat exchange performance of an air source heat pump or air conditioner side, so that an efficient refrigeration / heating system with low operation cost is realized.

Description

technical field [0001] The invention relates to a system for preferentially utilizing natural energy, off-peak power and energy storage means, optimizing the working conditions of heat pumps, improving the heat transfer performance of air source heat pumps and air conditioners, and realizing high-efficiency and low-cost operation of refrigeration / heating systems. It belongs to the technical field of natural energy utilization, refrigeration / heating heat pump or air conditioning system design and manufacture. Background technique [0002] Building energy consumption refers to the energy consumption during building use, including heating, air conditioning, lighting, hot water, household appliances and other power consumption. Among them, heating and air conditioning energy consumption is the main energy consumption, accounting for 50% to 70% of the total building energy consumption. [0003] How to reduce the utilization of primary high-grade energy is a key technical issue i...

AI Technical Summary

Problems solved by technology

The disadvantages are: the heat transfer coefficient between the energy-carrying fluid in the buried pipe and the soil outside the pipe is small, and the energy-flux density is low, so the system will occupy a large underground and above-ground space, and the initial investment is high

Although ground source heat pumps can make good use of natural energy and operate stably, it is difficult to use valley electricity to reduce operating costs

[0007] 3. Water source heat pump: water source heat pump is similar to ground source heat pump, its disadvantage is that it is limited by factors such as available water source conditions, geological structure of water layer, water resource use policy, energy structure and price

[0015] 1. Intermittent operation, only available for heating in winter, the utilization rate is not high;

[0016] 2. Even if the reverse cycle is not used, at most the energy efficiency ratio of the heat pump is maintained under the current working condition, and the energy efficiency ratio of the heat pump under extreme conditions cannot be improved;

[0017] 3. The coupling between the defrosting mechanism and the heat pump unit is too high, which increases the complexity of the heat pump unit and makes the operation control more complicated;

[0021] 1. The operation mode of sensible heat storage is simple, the cost is low, the service life is long, and the thermal conductivity is high, but the heat storage is small and the temperature is not constant when releasing heat;

[0022] 2. Latent heat energy storage is also called phase change energy storage. The energy storage density is higher than sensible heat energy storage, and the exothermic temperature is constant. The disadvantage is that the heat storage medium generally has the disadvantages of overcooling, phase separation, small thermal conductivity, and easy aging. ;

[0023] 3. Chemical reaction energy storage is a high-energy, high-density storage method. Its energy storage density is generally higher than sensible heat and latent heat, and it is easy to use for long-term energy storage. Disadvantages such as large investment and low overall efficiency;

[0029] 1. The centralized energy storage mode is adopted, and the initial investment is relatively large;

[0030] 2. The design and adjustment of the energy storage system are relatively complicated, and it is difficult to achieve the best energy efficiency when matching with the HVAC system;

[0031] 3. The ambient temperature at night is low, and the effect of using low-level natural energy combined with valley electricity for cold storage is better; but when using valley electricity for heat storage, it is difficult to use low-level natural heat energy, and energy efficiency is limited

[0032] 4. It is difficult for a kind of energy storage material to realize high-efficiency heat storage and cold storage at the same time, and the comprehensive utilization rate is low

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