摘要
“以电定热”和“以热定电”是天然气分布式系统两种传统的运行模式。“以电定热”是以电需求为基准,来确定系统的热需求(冷、热负荷)输出;相反的,“以热定电”是以热需求(冷、热负荷)为基准,来确定系统的电力输出。但在生产实践中,采用何种运行模式,才能更好的提高能源利用率,目前仍没有一个明确的界限。文章以武汉某天然气分布式能源站为例,在其年实际生产运行数据的基础上,以“年平均能源综合利用率、热电比和供热比”这三个指标进行评价,定量分析“以电定热”和“以热定电”两种运行模式,给出相应的运行建议:在冷热负荷需求较大时,采用“以热定电”方式运行,能有效的提高能源综合利用率及其他指标。在过渡季节,可采用“以电定热”方式运行,或对机组进行检修保养。冷热负荷是天然气分布式能源站高效率运行的一个重要的前提条件。提高负荷的需求量,才能更好的提高能源综合利用率。
"Determining heat by electricity"and"determining electricity by heat"are two traditional operation modes of natural gas distributed system."Determining heat by electricity"is to determine the required heat demand(cold and heating load)of the system based on electricity demand;on the contrary,"determine electricity by heat"is to determine the power output of the system based on heating demand(cold and heating load).However,in the production practice,what kind of operation mode,in order to improve the energy efficiency,there is still no clear boundary.Taking a natural gas distributed energy station in Wuhan as an example,on the basis of its annual actual production and operation data,this paper evaluates it with the three indexes,"annual average energy comprehensive utilization ratio,thermoelectricity ratio and heating ratio".This paper quantitatively analyzes the two operation modes of"determining heat by electricity"and"determining electricity by heat",and gives the corresponding operation suggestions:when the demand of cooling and heating load is large,the mode of"determining electricity by heat"can effectively improve the comprehensive utilization rate of energy and other indexes.In the transitional season,the"determining heat by electricity"mode can be used,or the unit can be overhauled and maintained.Cooling and heating load is an important prerequisite for the efficient operation of natural gas distributed energy station.Only by increasing the demand of load can we better improve the comprehensive utilization rate of energy.
出处
《科技创新与应用》
2019年第36期80-82,85,共4页
Technology Innovation and Application
关键词
以电定热
以热定电
年平均能源综合利用率
热电比
供热比
determining heat by electricity
determining electricity by heat
annual average comprehensive energy utilization ratio
thermoelectric ratio
heating ratio
