Energy storage heat pump or air conditioner

Abstract

The invention discloses an energy storage heat pump or air conditioner characterized by comprising a first heat pump (1), an energy storage module (2), a second heat pump (3) and a heating ventilation and air conditioning terminal system (4). The energy storage heat pump or air conditioner is a system for realizing refrigerating / heating through efficient and low-cost operation by optimizing the working conditions of the heat pumps by preferentially utilizing natural energy, valley electricity, afterheat and waste heat as well as energy storage means.

Description

technical field [0001] The invention relates to a cooling / heating system that utilizes natural energy, off-peak electricity, waste heat and energy storage means preferentially, optimizes the working condition of a heat pump, and realizes high-efficiency and low-cost operation. 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 in designing HVAC systems for energy-saving buildings. Utilizing low-grade heat energy 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

[0017] 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;

[0018] 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. ;

[0019] 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;

[0025] 1. The centralized energy storage mode is adopted, and the initial investment is relatively large;

[0026] 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;

[0027] 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

[0028] 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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