Comprehensive optimization method for small biomass methane combined supply system of cooling, heating and power

Abstract

The invention discloses a comprehensive optimization method for a small biomass methane combined supply system of cooling, heating and power. According to the method, for a given user capable of generating methane, the annual hourly cooling heating and power load requirement of the given user in a typical meteorological year is simulated, and an annual cooling heating and power load curve of a building is obtained; variable working condition characteristics of a main device of the combined supply system of cooling heating and power are designed; the small biomass methane combined supply system of cooling heating and power is constructed and designed; the optimization variable of the small biomass methane combined supply system of cooling heating and power is determined, the parameters of other devices in the small biomass methane combined supply system of cooling heating and power are set with the energy saving rate, the cost recovery rate and the emission benefits relative to a traditional separated supply system as the comprehensive target; optimization restraint conditions are determined; an optimization design target function is set up; the optimization design target function is worked out, the optimization variable is obtained, and the optimal configuration of other devices of the system is obtained. The method is simple and practical and is suitable for engineering optimization design of various small biomass methane combined supply systems of cooling heating and power through cooperation with the building energy consumption analysis theory.

Description

technical field [0001] The invention relates to the field of energy technology, in particular to a comprehensive optimization method for a small-scale biomass biogas cogeneration system. Background technique [0002] As a large agricultural country, my country has abundant biomass energy resources. The resources that can be used to produce biomass gas each year are equivalent to about 250 million tons of standard coal, which can convert about 199 billion cubic meters of biogas equivalent, equivalent to 120 billion cubic meters of natural gas, which is equivalent to my country's natural gas consumption in 2011 was 93% of 129 billion cubic meters. According to the total energy consumption in 2011 (3.48 billion tons of standard coal), the development of biomass gas will increase the proportion of China's gas energy consumption by about 7%. As a typical biomass gas renewable energy, biogas has the advantages of high calorific value and low combustion pollution. The complete combu...

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Problems solved by technology

However, due to the difficulty in modeling each component and the heavy workload, the current conventional optimization

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