Power cold combined supplying system suitable for recycling temperature varying heat source

Abstract

The invention discloses a power cold combined supplying system suitable for recycling temperature varying heat sources. The power cold combined supplying system suitable for recycling the temperature varying heat sources comprises a pump, an evaporation superheater, a turbine, a generator, a high pressure generator, a multi-heat-source low pressure generator, a condenser, an evaporator, an absorber, a solution pump, a low temperature solution heat exchanger, a high temperature solution heater exchanger and throttle valves V1 to V5, sluice valves V01 to V05 and a tee joint V00; the pump, the evaporation superheater, the turbine, the generator, the high pressure generator, the sluice valves V01 to V05 and the tee joint V00 are formed into an ammonium hydroxide mixed working medium Rankine cycle; the high pressure generator, the multi-heat-source low pressure generator, the condenser, the evaporator, the absorber, the solution pump, the low temperature solution heat exchanger, the high temperature solution heater exchanger and the throttle valves V1 to V5, the sluice valves V01 to V05 and the tee joint V00 are formed into a lithium bromide absorption type refrigerating cycle; the temperature varying heat sources firstly drive the ammonium hydroxide mixed working medium Rankine cycle to provide electric power to exterior and waste heat drives lithium bromide absorption type refrigerating cycle to produce cooling load through condensation heat of the ammonium hydroxide mixed working medium Rankine cycle.

Description

technical field [0001] The invention belongs to the field of medium and low temperature waste heat recovery and power engineering, and in particular relates to a power-cooling combined power supply system with adjustable power-cooling output ratio suitable for recovering variable-temperature heat sources. Background technique [0002] Energy is the foundation of social progress and economic development. Since the reform and opening up, China's economy has continued to grow at a high speed. At the same time, the country's total energy consumption has also increased year by year. In 2011, China's total energy consumption has surpassed that of the United States, becoming the world's largest energy consumer countries, but China's total GDP is much different from that of the United States. The consumption of a large amount of energy has also brought enormous pressure to the national energy supply, energy security and ecological environment. For this reason, the National Twelfth ...

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Problems solved by technology

For the combination of ammonia Rankine cycle and absorption refrigeration technology, Chen Qiang et al. proposed in the paper "Analysis of Thermal Performance of New Micro-turbine Distributed Cooling and Heating Power System" (2013 Proceedings of Engineering Thermophysics Society, paper number: 131226) An ammonia rankine cycle condenses the heat to drive the absorption refrigeration machine, but this process is only suitable for the case where the temperature of the heat source is stable. When the temperature of the heat source drops, the system will not work, and it is suitable for the coupling of the power system and the absorption refrigeration system The flow of the low-pressure generator, a key component, does not give an implementation method, nor does it consider the coupling relationship between the power generation cycle and the refrigeration cycle

[0006] To sum up, for the utilization of waste heat, the existing technology mainly considers the recovery of the quantity of heat energy, but does not consider the temperature matching of heat energy. There is a large temperature difference between the waste heat source and the waste heat recovery equipment, and the effective cascade utilization of heat energy cannot be realized.

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