Sub-metering to Electricity Use in Large-scale Commercial Buildings

Transcription

1 Sub-metering to Electricity Use in Large-scale Commercial Buildings Wang Yuan Tsinghua University 26.11

2 Index Situation of Energy consumption in commercial buildings Significance of sub-metering and statistics Method to actualize sub-metering Practice Project example Use of data Analysis Software Sub-metering and statistics to electricity use in commercial buildings 2

3 Situation 4 types of large-scale commercial building 3 Shopping mall 3 Hotel kwh/m 2.a 2 1 kwh/m 2.a 2 1 kwh/m 2.a different characteristic of Office building energy system and operation time Government office building kwh/m 2.a Sub-metering and statistics to electricity use in commercial buildings 3

4 Situation Great Difference between each type Type Sampling amount number Mean EC Sampling limit error Authentic boundary (kwh/m 2.a) (kwh/m 2.a) (kwh/m 2.a) Shopping mall ~24 Hotel ~129 Office Building ~119 government office building ~89 Sub-metering and statistics to electricity use in commercial buildings 4

5 Situation of Energy consumption in Large-scale commercial buildings Types Area (billion m 2 ) Total consumption (billion kwh/a) Unit area consumption (kwh/m 2 a) Residential buildings 1 2 1~3 Common commercial buildings Large-scale commercial buildings ~ ~3 Total Where? How much? Which? What? complex electrical systems lack of separate measure meters Sub-metering and statistics to electricity use in commercial buildings 5

6 Significance Sub-metering Get the real-time and exact data of each system Analyze the building energy consumption Identify the inappropriate problem timely Diagnose the building energy efficiency procedure Evaluate the effectiveness of retrofit Base for statistics Sub-metering and statistics to electricity use in commercial buildings 6

7 Index Situation of Energy consumption in commercial buildings Significance of sub-metering and statistics Method to actualize sub-metering Practice Project example Use of data Analysis Software Sub-metering and statistics to electricity use in commercial buildings 7

8 Method of sub-metering Whole electric power consumption of a building illumination system Equipments on Socket Hvac system Oter systems and equipments Special function room indoor computer Chiller Fan of cooling tower Heating water system Computer room outdoor printer Chilled pump cooling pump elevator copier Air hand unit Fresh air hand unit drinking water system scanner Fan coil unit Air conditioner Fire control system Heating Circulating pump Electrically driven heating equipment water supply and sewerage system Sub-metering and statistics to electricity use in commercial buildings 8

9 Method of sub-metering Real-time electricity consumption data Target building Database Research center Communication line Fire wall rooter Internet rooter Fire wall Core switchboard switchboard gateway Electric meter Core switchboard Data server Communicate server Office net PC switchboard Sub-metering and statistics to electricity use in commercial buildings 9

10 Project example An office building in Beijing,4545m 2 Electric meters Sub-metering and statistics to electricity use in commercial buildings 1

11 Results electricity consumption of every system on Working day hall, 3, 14% others, 3, 14% Illumination and equipment, 2338,11% elevator, 28.2, 1% Drinking equipment, 45, 2% kitchen, 24.6, 1% pump, , 14% fan, 2534,12% chiller, , 23% Computer room, , 8% Sub-metering and statistics to electricity use in commercial buildings 11

12 Analysis 16 Whole electricity consumption on Working day Power kw :16 14:54 15:26 16:6 So much electrical load at night 16:51 18:7 18:55 19:44 2:42 21:37 22:4 23:4 :4 1:4 2:4 3:4 4:4 5:4 6:4 7:4 8:4 9:4 1:4 11:4 12:42 13:42 Sub-metering and statistics to electricity use in commercial buildings 12

13 Analysis 5 Electricity consumption of chiller 4 3 Power kw :15 14:58 15:37 16:2 16:58 18:19 19:11 2:12 21:17 22:36 23:4 :48 1:52 2:58 4:2 5:8 6:12 7:14 8:2 9:34 1:38 12: 13:8 Sub-metering and statistics to electricity use in commercial buildings 13

14 Analysis Electricity consumption of fan coil unit Power kw :15 14:52 15:23 installed power 8kw,half on 15:54 About 2, kwh electricity waste a year 16:38 17:16 18:33 19:18 2:7 21:3 22: 23: : 1:2 2:2 3:8 4:8 5:8 6:8 7:8 8:1 9:1 1:1 11:13 12:16 13:17 Sub-metering and statistics to electricity use in commercial buildings 14

15 Analysis 4 Office illumination and equipments Power kw :52 14:3 15:1 15:44 Computer stand-by, 22,kWh electricity waste a year 16:31 17:12 18:33 19:24 2:16 21:25 22:26 23:36 :46 1:48 2:58 4:7 5:15 6:15 7:23 8:39 9:41 1:47 11:53 12:57 14:5 Sub-metering and statistics to electricity use in commercial buildings 15

16 Schedule of water heater 15 Electricity on week day 15 Electricity on weekend : 4: 8: 12: 16: 2: : 4: 8: 12: 16: 2: 15 1 Week day:13.54kwh,need time control Weekend:1.12kWh, need off 5 Heat preservation cost more Heating just a bit 6: 7: 8: 9: 1: 11: Sub-metering and statistics to electricity use in commercial buildings 16

17 Index Situation of Energy consumption in commercial buildings Significance of sub-metering and statistics Method to actualize sub-metering Practice Project example Use of data Analysis Software Sub-metering and statistics to electricity use in commercial buildings 17

18 Analysis Software Interface of the software Sub-metering and statistics to electricity use in commercial buildings 18

19 Thank you! Sub-metering and statistics to electricity use in commercial buildings 19