Application of building-type distributed energy systems for data centers

doi:10.3969/j.issn.1674-1951.2021.03.012

Abstract

Abstract:

The demand for electricity and cooling load in data centers is large and steady.The cooling-to-power ratio of data centers is close to that of gas-fired distributed energy systems, which means distributed energy systems are suitable for data centers.Through the analysis on the power demand of a data center,a scheme of a distributed energy station with an appropriate scale which can ensure the safe power supply to the data center is designed.The scheme takes internal combustion engine, gas and hot water type LiBr-H₂O refrigerator, centrifugal electric refrigerator and cold storage tank,which can realize the green and low-carbon operation of the data center.The gas-fired distributed power supply scheme is made based on a low-carbon energy-supply model. The evaluation results show that this scheme makes full use of the off-peak electricity, reduces operating costs and improves the economy.The power station is economically feasible, with low energy consumption, decent energy saving and emission reduction effect.This scheme is practicable for the data centers wherever there are reasonable carbon trading prices and stable,reliable and cheap gas sources nearby.

Key words: distributed energy system, data center, ambient cooling, energy saving and emission reduction, cooling-to- power ratio, green and low carbon, carbon neutrality, carbon emission peaking

CLC Number:

CHEN Hui, LIU Ying, ZHAO Longsheng. Application of building-type distributed energy systems for data centers[J]. Huadian Technology, 2021, 43(3): 76-81.

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指标	数值
年发电量/（GW·h）	104.71
年供电量/（GW·h）	78.17
年供空调冷量/（GW·h)	438.00
CCHP系统等效利用小时/h	5 840
电制冷机组制冷利用小时/h	8 760
内燃机年耗天然气量/(万m³·a^-1)	2 453
发电天然气气耗率^①/[m³·(MW·h)^-1]	142.4
供电天然气气耗率^①/[m³·(MW·h)^-1]	149.9
供冷天然气气耗率^①/（m³·GJ）	29.03
发电厂用电率⁽¹⁾/%	5
综合能源利用效率^①/%	79
热电比^①/%	91.6
用电网平段电量/(GW·h)	20.062 4
用电网低谷电量/(GW·h)	24.316 8
年耗水量/万t	196.3

名称	数值
天然气价格/（元·m^-3）	2.60
冷价/[元·（kW·h）^-1]	0.16
水价/（元·t^-1）	4.20
平段电价/[元·（kW·h）^-1]	0.641 8
低谷电价/[元·（kW·h）^-1]	0.313 9
能源站供数据中心电价/[元·（kW·h）^-1]	0.80

项目名称	指标
静态投资/万元	25 396
总投资收益率/%	7.70
资本金净利润率/%	24.07
内部收益率（税前）/%	12.27
投资回收期（税前）/a	8.34
内部收益率（税后）/%	9.43
投资回收期（税后）/a	9.73

项目	烟尘	SO₂	NO_x	CO₂
CCHP系统	0	2.94	29.10	47 200
国家电网供电排放量	2.20	23.57	66.37	57 400
减排量	2.20	20.63	37.27	10 200