Effective-flexible cogeneration system in supercritical carbon dioxide

Abstract

The invention discloses an effective-flexible cogeneration system in supercritical carbon dioxide, which comprises a power-cycle power generating system in supercritical carbon dioxide, a reverse circulation heating system in supercritical carbon dioxide and a shunt water heating system for heating water. Based on the existing power-cycle power generating system in supercritical carbon dioxide, the effective-flexible cogeneration system adds the reversing circulation in supercritical carbon dioxide, thereby the residual heat quality of the driving force circulating cold end can be improved, then the residual heat can meet the requirement of heating, and the aims of the cogeneration system can be achieved and the comprehensive utility efficiency can be highly improved. By shunting the shunt water heating system, one part of the water can be heated directly by the residual heat in higher temperature of the driving force circulating cold end, and the other part of the water absorbs the residual heat in lower temperature by the heat pump technology and heat the shunting water. The cogeneration system realizes the classification using of the energy, and by adjusting proportion of shunting, the cogeneration system adjusts the proportion of external power supply and heat supply, and then the system can realize the totally hot electrolytic coupling.

Description

technical field [0001] The invention belongs to the technical field of novel thermodynamic cycles, and in particular relates to a high-efficiency and flexible cogeneration system of supercritical carbon dioxide. Background technique [0002] With the increase in the proportion of intermittent new energy generation such as wind power and photovoltaics, higher requirements are placed on the rapid peak-shaving capability of the power grid. However, most of the existing coal-fired cogeneration units adopt the method of "setting electricity by heat", which has poor peak regulation capability. At present, the demand for heat load in the northern winter heating period is large, and the demand for electric load is small. Conventional cogeneration units need to give priority to ensuring the heat supply However, due to the poor thermoelectric decoupling ability, the electrical load is also very high, occupying the share of power generation of new energy sources, leading to serious aba...

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Problems solved by technology

However, most of the existing coal-fired cogeneration units adopt the method of "setting electricity by heat", which has poor peak regulation capability. At present, the demand for heat load in the northern winter heating period is large, and the demand for electric load is small. Conventional cogeneration units need to give priority to ensuring the heat supply However, due to the poor thermoelectric decoupling ability, the electrical load is also very high, occupying the share of power generation of new energy sources, leading to serious abandonment of wind and light, and serious waste. Therefore, the flexibility of cogeneration units is improved to achieve Thermoelectric decoupling is important

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