Novel combined cooling, heating and power system with flexible and controllable heat-electricity ratio and control method thereof

Abstract

The invention discloses a novel combined cooling, heating and power system with a flexible and controllable heat-electricity ratio and a control method thereof. The system comprises a generator set, aheat recovery device and an absorption type refrigerating or heating unit which are sequentially connected, and further comprises a heat pump connected with the generator set, wherein the power consumption of the heat pump is provided by the generator set. According to the novel combined cooling, heating and power system, the heat-electricity ratio output by the system can be flexible, continuousand adjustable by adjusting the power of the generator set and the power of the heat pump. On one hand, the structure of the system can be prevented from being complicated so that the initial investment cost can be reduced, and on the other hand, a simple control strategy is adopted so that practical application can be facilitated.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and energy saving, and in particular relates to a novel combined cooling, heating and power supply system with a flexible and controllable heat-to-electricity ratio and a control method thereof. Background technique [0002] At present, the cooling and heating loads in my country's building energy consumption account for at least 50% of the total load. The traditional energy supply method using electricity as a single source is difficult to meet the diversified needs of loads. . The Combined Cooling Heating and Power (CCHP) system recycles waste heat from power generation and completes power generation, cooling and heating at the same time, greatly increasing the energy utilization rate to more than 75%, and realizing the efficient and comprehensive supply of combined cooling, heating and power , which can meet the diversified needs of building energy consumption and effectively r...

AI Technical Summary

Problems solved by technology

However, this method increases the heat-to-electricity ratio by reducing the minimum power generation of the steam turbine, which reduces the power generation efficiency, and at the same time cannot flexibly regulate the output heat, making the system unable to operate efficiently and stably under the condition of real-time changes in heat and electricity loads, and the The method needs to use multiple sets of heat pumps, which increases the investment cost

[0006] To sum up, in the prior art, there is still a lack of effective solutions for how to improve the output heat-to-power ratio of the combined cooling, heating and power system in a flexible and controllable manner to cope with changes in the heat and power load of users.

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