Carbon dioxide heating and cooling combined system

Abstract

The invention discloses a carbon dioxide heating and cooling combined system. The system adopts two parts; one part adopts R134a as a high temperature part of a refrigerant, and the other part adopts carbon dioxide as a low temperature part of the refrigerant. The carbon dioxide heating and cooling combined system has the beneficial effects that: all of the refrigerant adopted by the system is an environment-friendly refrigerant; R134a is a medium-low-temperature environment-friendly refrigerant which is widely popular at present; carbon dioxide is adopted as a pure natural refrigerant; an ozone layer depletion potential value is 0; a global warming potential value is 1; carbon dioxide has relatively high unit volume refrigerating capacity and has excellent thermodynamic property; the system can completely recycle heat of condensation to generate high-temperature hot water, medium-temperature hot water and low-temperature hot water; an expansion machine which is additionally arranged in the system utilizes energy lost by throttling and reducing pressure, improves back pressure of carbon dioxide and greatly improves the efficiency of the whole system; heat of condensation of an additional support system is completely utilized by the system to increase a back temperature of carbon dioxide.

Description

technical field [0001] The invention belongs to the technical field of refrigeration systems, and in particular relates to a carbon dioxide combined cooling and heating system. Background technique [0002] Traditional conventional refrigerants have certain problems in terms of safety and environmental protection, and the exhaust temperature of R134a in a refrigeration system using R134a as a refrigerant is relatively high, and its condensation heat is usually dissipated through the condenser, failing to dissipate it Effective utilization will make this part of heat be wasted, and if it can be effectively utilized, the efficiency of the entire system can be improved. Contents of the invention [0003] The object of the present invention is to overcome the above disadvantages and provide a carbon dioxide combined cooling and heating system. [0004] The technical scheme of the present invention is as follows: the system includes two parts, one part uses R134a as the high-t...

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Problems solved by technology

[0002] Traditional conventional refrigerants have certain problems in terms of safety and environmental protection, and the exhaust temperature of R134a in a refrigeration system using R134a as a refrigerant is relatively high, and its condensation heat is usually dissipated through the condenser, failing to dissipate it Utilize it effectively so that this part of the heat is wasted, and if it can be used effectively, the efficiency of the entire system can be improved

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