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燃气发电机组余热利用方案全制定

来源:http://www.huannengpower.com   发布于:2018-01-31

综合利用燃气发动机热能主要从三个方面着手:即电力供应、采暖洗浴等供热以及夏季空调制冷。目前国外热电或冷电两联供的燃气发动机综合应用实例较多,三者集中于整套动力设备的情况较少,国内还没有使用的介绍。从技术可行性的角度出发,是完全可以达到的。在综合利用的设计过程中应充分考虑以下几方面的因素:

The comprehensive utilization of gas engine heat energy mainly from three aspects: power supply, heating and bath heating and summer air conditioning refrigeration. At present, there are many examples of comprehensive application of foreign gas engine combined with thermoelectric or cold electric two, and the Three concentrates on the whole set of power equipment. From the point of view of technical feasibility, it can be achieved completely. In the design process of comprehensive utilization, the following factors should be taken into consideration.

a、利用应避免对发动机的性能产生大的影响,即不影响燃气发电机组的正常运行及功率输出;

The use of a, which should be avoided, has a great influence on the performance of the engine, that is, it does not affect the normal operation and power output of the gas generator.

QQ截图20171025151846.jpg

b、排气总管到热交换器之间的距离应尽可能短,同时应充分考虑排气管的隔热保温,减少从发动机排气出口至热交换器文章的热量损失;

The distance between the B and the exhaust manifold to the heat exchanger should be as short as possible. Meanwhile, the heat insulation of the exhaust pipe should be fully considered to reduce the heat loss from the exhaust port of the engine to the heat exchanger.

c、需要考虑燃气发电机组负荷变化时给制冷、制热造成的影响,避免因负荷变化使制冷(或制热)过量或能力不足;

C, we need to consider the influence of gas generator load change on refrigeration and heating, and avoid excess or insufficient capacity of refrigeration or heating due to load changes.

d、考虑到整个流程控制范围大、项点多、操作难度大等因素,整个系统应尽可能实行电气自动化控制和监测;

D, the whole system should carry out electrical automation control and monitoring as far as the whole process control range is large, the item points are many, and the operation is difficult.

e、整套系统应充分考虑维护操作以及使用的安全性。

The E and the whole system should take full consideration of the maintenance operation and the safety of the use.

在燃气发电站中采用热电联供装置,可在机组发出电力的同时,将燃气发动机排出的热量充分利用起来,用于冬季取暖以及日常洗浴等生活之用。设计时应考虑的因素包括热水量的调节、热水系统的压力、热水系统与热源设备的配套连接、多余热水部分的旁通及紧急情况下热水的切断等。

In the gas fired power station, the combined heat and power unit can make full use of the heat discharged from the gas engine at the same time when the unit sends electricity, and it can be used for heating and bathing in winter. The factors that should be considered in the design include the adjustment of hot water volume, the pressure of the hot water system, the matching connection between the hot water system and the heat source equipment, the bypass of the excess hot water part and the cut-off of hot water in emergency.

采用这种方式时,生活用洗浴热水取自发动机冷却水热交换器,这部分水的温度一般在40~50℃,完全能够满足使用要求;生活区取暖用热水取自排气部分,燃气发动机的排气温度一般在450~550℃,加热后的热水温度可达到80~110℃(压力在0.2MPa左右),这样可以保证取暖所需的热量

When used in this way, life with the bath water from the engine cooling water heat exchanger, the water temperature at 40~50 degrees, can completely meet the demands of the living area; heating with hot water from the exhaust gas of the engine, the exhaust temperature in 450~550 degrees, the hot water temperature can reach 80~110 DEG C (pressure in 0.2MPa so, it can guarantee) required for heating the heat

3.2 发电与制冷、制热三联供

3.2 power generation, refrigeration and heat production

另外一种余热利用的方式是在满足机组发电的同时,利用冷却水及排气的热量进行制冷和制热,即冷、热、电三联供。供热我们仍然采用3.1所述方案,而制冷部分我们可使用较成熟的吸收式溴化锂制冷机,其结构由高发部分和主体部分组成。

Another way to use waste heat is to meet the needs of generating electricity while cooling and heating by cooling water and exhaust heat, that is cooling, heating and electricity. For heating, we still use 3.1 schemes, while the refrigeration part can use a mature absorption lithium bromide refrigerator. Its structure is made up of high incidence part and main part.

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