Heat pump mixed working medium and application thereof

Abstract

The invention discloses a heat pump mixed working medium. The heat pump mixed working medium comprises, by mass, 30-55% of a halogenated olefin and 45-70% of carbon dioxide, and the standard boiling point of the halogenated olefin is -21 DEG C or above. The invention also discloses an application of the heat pump mixed working medium. The heat pump mixed working medium is applied to medium and high temperature heat pumps with a heating temperature of 55 DEG C or above. The heat pump mixed working medium provided by the invention does not damage the atmospheric ozone layer, produces a small greenhouse effect, is very suitable for heating in cold regions, and has better thermal parameters and thermal performances than R134a.

Description

technical field [0001] The invention relates to a medium-high temperature heat pump working medium, in particular to a heat pump mixed working medium and its application. Background technique [0002] According to the data of "China Building Energy Consumption Research Report (2017)", my country's building energy consumption accounted for 20% of the country's total energy consumption in 2015. In building energy consumption, heating energy consumption in winter in northern China accounts for about 40%. The data shows that the per capita building energy consumption in urban heating areas in northern my country is 1.2 tons of standard coal, almost twice that in non-heating areas. This shows that in building energy consumption, heating energy consumption in winter undoubtedly occupies a considerable proportion. [0003] Since heating energy consumption accounts for a considerable proportion of my country's building energy consumption and even total energy consumption, and my co...

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Problems solved by technology

In its embodiment, the maximum temperature on the condensing side only reaches 110 degrees Fahrenheit (about 43.3 degrees C), which cannot meet the heating and hot water temperature requirements in northern regions

The working fluid composition disclosed in the above-mentioned patents has disadvantages such as not being suitable for working conditions in cold regions, and poor heating performance at high temperatures.

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