Water source heat pump hot water system for three-layer gradient utilization of waste water waste heat

Abstract

The invention discloses a water source heat pump hot water system capable of realizing three-layer gradient utilization of waste water waste heat, which is characterized in that a water-water heat exchanger, two evaporators and two condensers are vertically arranged in three layers, and the water-water heat exchanger, the evaporators, the condensers and other parts are designed in a stainless steel shell, so that the overall floor area of equipment is greatly reduced, and the transportation is convenient; the length of a copper pipe for connecting all parts is shortened, heat loss is reduced, the temperature difference between the evaporation temperature and the condensation temperature is closer, the working condition of a hot water system is more stable, and the COP of the system is higher.

Description

technical field [0001] The invention belongs to the field of waste hot water heat recovery and recycling, and particularly relates to a water source heat pump hot water system for three-layer cascade utilization of waste water waste heat. Background technique [0002] In 2020, my country's total energy consumption will be 4.98 billion tons of standard coal, an increase of 2.2% over the previous year. Among them, building energy consumption accounts for about 20% of my country's total energy consumption, and hot water supply accounts for about 15% of building energy consumption; hot water is basically used for residents' bathing, and the bathing process is a coexistence of thermal energy demand and thermal energy waste. The temperature of hot water for bathing is generally 40°C to 45°C, and the waste hot water after bathing is generally 32°C to 35°C. The bathing process only consumes about 10°C of thermal energy, but heating the bath water needs to increase the temperature of...

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Problems solved by technology

However, it is composed of a set of water-water heat exchanger, a first-level water source heat pump, and a second-level water source heat pump. The three devices are arranged in the ground along the horizontal direction and work through the connection of water pipes. The equipment occupies a large area. , and the wastewater inlet temperature of the second-stage water source heat pump is low, and the clean water outlet temperature is high, resulting in a very large temperature difference between the evaporation temperature and the condensation temperature, and the heat pump works under relatively unfavorable conditions

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