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Explore metrology charges and improve the hydraulic conditions
I. Preface The transformation of central heating from welfare to commodities is an inevitable result of the reform of our economic system and the implementation of a socialist market economy. Heating companies from the nature of the business entity to change is the trend of the times, and some heating companies are changing, and some heating companies have completed this change and become market-oriented, self-financing, self-development of the enterprise or joint-stock company. Since it is an enterprise, management should be a commodity. In developing a market economy, heating companies should charge consumers with heat metering in the same way as power companies, water companies and gas companies. This is an important measure to save energy. Moreover, the conditions for charging by heat are maturing. In a market economy, in order to obtain more profits, enterprises need to make technological progress, reduce costs and develop themselves. Improving the hydraulic conditions of heating systems is an effective way and some effective measures have been taken. This article will talk about these two issues a few comments for reference. Second, heat metering and charging scheme Imagine and test heating as a commodity into the market, like electricity, gas, tap water supply tens of millions of households, according to the same billing, it is due to arrive sooner or later. Metering charging is an important measure to save energy. Some heating companies have researched and tested how to reconstruct existing user systems to meet the requirements of metrology charges. How to put forward metrology fees is an important measure to save energy. Some heating companies have been studying And how to reconstruct the existing user system to meet the requirements of metrology and charging and how to propose metrology and charging schemes from the reality. The newly-built heating system should give full consideration to this issue to meet the needs of future development. 1. Metering charging scheme Assumption: Yantai 500 heat grid demonstration project in order to meet the needs of future measurement fees, ready to choose to pilot study. The initial plan has the following options to choose from: (1) the user points to install calorimeter, each set of radiator inlet to install temperature control valve; the user can adjust the temperature of each room according to their own requirements, the implementation of energy-saving heat, that is, People are not (office work and off hours, home on weekdays at home and holidays, ...) can adjust the temperature, in order to save energy consumption to reduce heat bills. This will most stimulate user awareness of energy conservation, to achieve energy-saving effect, is the most perfect way of charging heat metering. The heating system should be double pipe. The new design is best able to use this approach, but for multi-user multi-storey and high-rise residential buildings will bring system layout difficulties, pipelines and cost increases. (2) User inlet Install calorimeter and temperature control valve: The temperature control valve is installed on the inlet pipe. The user can adjust the temperature of the room by changing the temperature of the temperature sensor set in a specific position, To reduce energy consumption and reduce heat costs, to stimulate the user energy-saving meaning, to achieve energy-saving effect. This is a better way to charge hot metering. Heating system should be double pipe. Different from 1 program only can not achieve the independent regulation of each room, can not do each room to be treated differently. As the thermostat less than a program, the cost is slightly lower, but the problems are more or less the same. (3) a group of users (for example, a door) entrance to install calorimeter, each user radiator inlet to install temperature control valve and hot water meter: according to the amount of heat through the water delivery heat fee. Users can freely adjust the room temperature, the implementation of energy-saving heat, reduce the amount of heat through the water to reduce heat. Heating system should be double pipe. This is the original double-tube system is more convenient and can be achieved basically reasonable charges. However, if the design of the radiator area of ​​the user will appear too large difference between the temperature difference between users and lead to charges unreasonable. Therefore, it must be provided that users are not allowed to increase their own radiator. (4) a group of users (for example, a door) entrance to install calorimeter, the user radiator inlet installation of water meters: Users according to the amount of water passed through the heat delivery heat. Heating system should be double pipe. The system and the user entrance lock in a unified adjustment. This is a way to ensure the heating effect according to the measurement of charges. The advantage is similar to the third solution, but the user can not take the initiative to adjust. (5) a group of users (for example, a door) to install the entrance to install calorimeter, the radiator inlet installed thermostatic valve, the surface mounted heat distributor; users according to the distributor to record the data prorated heat delivery heat. Heating system should be double pipe or with a single pipe across the tube. Users can freely adjust the room temperature, the implementation of energy-saving heat. This is the original order is a single tube is a convenient way to transform and charge a more reasonable way. (6) a group of users (for example, a door) entrance to install calorimeter, the radiator surface to install the heat distributor, the user according to the distributor of the proportion of heat to pay the heat fee. The system locks after unified adjustment. This is also a way to charge heat by protecting the heating effect. In order to ensure the heating effect can be transferred to the same, the original system is the best way to single-tube with a single tube over the tube. The disadvantage is that users can not take the initiative to adjust. For old residential buildings it is a relatively affordable way to change costs. (7) a group of users (for example, a door) to install the entrance to install calorimeter: the user according to the construction area (or the use of area) share heat delivery heat fee. The system locks in a unified adjustment of qualified. This is also a guarantee of heating effect under the premise of the heat charge. The disadvantage is that users can not take the initiative to save energy, and assessed by the area as allocated by the amount of water or distributor reasonable. Heating system can be used with a single pipe across the tube, but also without any changes to retain the status quo (currently more single-tube type). For old residential buildings it is a simple and practical way to retrofit, reduce, and justify charges more than purely area-based. (8) a group of users (such as a heat station or a building) entrance to install calorimeter, a group of users (one building or one door) user inlet installation of water meters: a group of users according to the amount of water through the first total amount of heat , Each user and then share the heat distribution costs. The system locks in a unified adjustment of qualified. This is also a guarantee of heating effect under the premise of heat charging. The advantage is that the heating system can not make any changes, the disadvantage is that users can not take the initiative to save energy, shared by a secondary stall as reasonable. This kind of scheme is simple, the reconstruction cost is the least, but the reasonableness of the fee collection is poor, which can only be used as a transitional method for charging the old buildings. Several scenarios envisaged above will be compared after the test favorably choose. It is understood that the scheme of measuring charges in foreign countries is not unified or measured to the point of introduction and apportioned by appropriate methods (including distributor records, water records and area measurement, etc.). To date, some countries with advanced heat supply still use a range of areas to share their fees. Therefore, the measurement fee plan must be based on national and local financial resources, the degree of institutional reform, the user's affordability, transformation conditions and energy-saving potential and other factors comprehensive choice. It is necessary to pass the pilot study. 2. Construction pilot; last year, under the guidance of the Urban Construction Division of the Ministry of Construction, the United States Honeywell cooperation with Yantai City, Yantai City, people's livelihood community to establish demonstration sites for experimental measurement of charge: Single-tube system test: choose eight House (each floor a door, six). Among them, six of the transformation of the fifth scheme above, and to improve the system conditions to choose three different settings: ①inlet set pressure regulator, the vertical pipe set up vertical and horizontal balance valve; ② in the inlet Not set the pressure regulator, while the vertical pipe is not set vertical balance valve; ③ in the inlet does not set the pressure regulator, but only in the vertical pipe, the vertical balance valve set up, two only in the inlet to install calorimeter Comparative Test. Two-tube system test: choose four buildings (each floor of a door, seven). Among them, two of the transformation of the third scheme above, in order to improve the heating system conditions, but also the introduction of pressure regulator set at the entrance, the vertical pipe set up vertical and horizontal balance valve; two only in the entrance to install calorimeter For comparison test. Equipment used in the system manufacturers are: digital calorimeter, heat distributor is Germany Techem products: temperature control valve, stand pipe balance and pressure regulating valve is the German MNG company's products. Specific arrangements, see Table 2-1 test program equipment configuration expression Table 2-1 program code NO. Building No. hot inlet total heat meter hot inlet installed differential pressure control system stand pipe balance valve radiator mounted temperature control valve radiator Installed hot distributor radiator installed hot water meter floor area of ​​square meters Note S1 ZTE 23 Yes Yes Yes Yes Yes 865.4 S1 ZTE 24 Yes Yes Yes Yes Yes Yes 865.4 S2 ZTE 20 Yes Yes Yes Yes 865.4 S2 ZTE 21 Yes Yes Yes Yes 865.4 S3 Dongxing 9 Yes Yes Yes 865.4 S3 Dongxing 12 Yes Yes Yes Yes 865.4 S4 Dongxing 8 Yes 865.4 S4 Dongxing 11 Yes 865.4 D1 Dongxing 26 Yes Yes Yes Yes Yes Yes Yes 742.0 D1 Dongxing 29 Yes Yes Yes Yes Yes Yes 742.0 D2 Dongxing 28 Yes 742.0 D2 Dongxing 27 742.0 Description: ☆ differential pressure control valve with self-operated pressure. ☆ temperature control valve installed in each radiator inlet, double-pipe system with straight-through, single-pipe system with three-way. ☆ hot water meter installed in each radiator exports. ☆ heat distributor installed in the middle of the radiator plane. ☆ only install the total heat meter building number for comparison with the building. 3. Test data and analysis: (1) Accumulated data of heat record: The test points passed the winter operation of 1997 ~ 98 and the heat record data of December 31, 1997 to March 16, 1998 are shown in Table 2-2. Heat accumulation record data expression Table 2-2 Program code NO. Building No. December 31, 1997 January 15, 1998 January 31, 1998 February 16, 1998 March 1, 1998 March 1998 16 Record period Heat consumption Total MWH Heat consumption per unit area ZTE 23 8.80 17.45 28.38 37.52 42.72 49.21 40.41 24.63 S1 ZTE 24 8.39 17.64 28.69 38.20 43.84 50.05 41.66 25.39 S2 ZTE 20 9.35 17.24 28.63 38.24 43.30 49.49 40.14 24.46 S2 ZTE 21 9.03 16.75 26.82 35.25 39.94 45.92 36.89 22.48 S3 Dongxing 9 6.72 17.21 28.18 37.45 42.52 48.74 40.02 24.39 S3 Dongxing 12 10.53 19.62 31.35 41.64 46.89 54.53 44.00 26.82 S4 Dongxing 8 8.29 16.84 27.76 37.20 42.26 48.40 40.11 24.45 S4 Dongxing 11 9.75 19.91 32.49 43.16 48.57 54.79 45.04 27.45 D1 Dongxing 26 7.45 14.92 25.26 33.96 38.63 44.36 36.91 26.24 D1 Dongxing 29 7.21 14.90 24.54 32.95 37.23 43.66 35.45 25.20 D2 Dongxing 28 2.36 6.39 17.20 26.40 31.25 37.13 34.77 24.72 D2 Dongxing 27 8.06 16.61 27.20 36.23 40.71 47.04 38.98 27.71 Note: ☆ H 1997 12 From January 31 to March 16, 1998 a total of 78 days, or 1896 hours. ☆ H unit: the heat is "kilowatt hour", the heat loss per unit area is "kilowatts / square meter" (2) House heat consumption analysis: select the cumulative heat records from January 15 to February 16 to calculate the unit area The measured average calorific value, calculate the average heat index of each program area. The average daily outdoor temperature and average outdoor temperature of this time period are shown in Table 2-3. The average heat consumption of each test plan is shown in Table 2-4. January 15 to February 16, 1998 Daily outdoor average temperature meter 2-3 days 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 External temperature ℃ -2.60 -1.90 -3.90 -7.70 -5.48 -3.78 -1.58 -0.78 -3.87 -4.79 -2.21 -0.04 -0.34 -1.77 -0.58 1.81 0.50 Day 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Average monthly temperature in ° C 0.78 1.87 1.08 -0.30 2.18 4.45 1.51 -1.34 0.59 1.80 7.22 4.22 3.20 1.83 3.79 -0.17 Note: Data from the meteorological station from January 15 to January 18 and the remaining data are from the daily average recorded on a time-of-day basis during the test. The coldest month is the average heat consumption of the test program. Table 2 -4 Project code Building number Unit area Heat consumption Measured value Unit area Thermal index Estimated value Energy saving rate% S1 ZTE 23, ZTE 24 30.61 40.43 8.22 S2 ZTE 20, ZTE 21 29.76 39.31 10. 76 S3 ZTE 9, ZTE 12 31.97 42.23 4.13 S4 ZTE 8, ZTE 11 33.35 44.05 0.00 D1 Dongxing 26, Dongxing 29 32.54 42.98 6.41 D2 Dongxing 28, Dongxing 27 34.77 45.93 0.00 Note: H There are 32 days, ie 768 hours, from January 15, 1998 to February 16, 1998. H unit, the heat "kilowatt hour", heat consumption per unit area and heat index "kW / m2" H indoor average temperature is not a complete record, according to limited records data analysis, the indoor average temperature is about 18 ℃, the user also reflects More satisfied, so in the calculation of thermal indicators ignore the indoor average temperature difference between programs. Therefore, the estimated value is approximate. (3) A few conclusions: According to a winter operation of the data analysis, the initial conclusions can be drawn as follows: Improve the system will achieve energy-saving effect. The data shows that the energy consumption of the test building are lower than the contrast building, saving 4.13 ~ 10.76% .Heat heating quality, no overheating and undercooling, customer satisfaction. Temperature control valve installed, and some users to save heat, when people leave off the small temperature control valve. Most of the users have not been able to establish the awareness of energy saving by the fact that they have not been charged according to the measurement, thus affecting the improvement of energy saving rate. Calculated thermal indicators per unit area of ​​45 watts / square meters, consider the heating efficiency of 85 ~ 90%, then the actual heat net per unit area of ​​56.25 ~ 50 watts / square meter. 10% lower than the current thermal design index. About transformation costs higher. According to preliminary calculations: the average cost per square meter of construction area of ​​about 40 yuan (35 to 45 yuan). The reasons are: First, the equipment is imported, and second, the cost of alteration, including the replacement of some of the pipeline costs. Third, to improve the system hydraulic conditions, energy conservation and improve the quality of heating to improve the heating system to improve the utilization of thermal energy, energy conservation involves many aspects of heat sources, heat network and users can not and do not want to be involved here, only to discuss the system Disorder, improve system hydraulic conditions a problem. Because it directly affects the user's heating quality and has a great potential for energy saving and is currently a common problem. 1. System hydraulic imbalance classification and its causes (1) system hydraulic imbalance can be divided into two kinds of level imbalance and vertical imbalance. The former shows that the user traffic on the horizontal plane deviates from the designed value, resulting in near and far cold and heat unevenness. The latter showed vertical flow into the radiator flow deviation from the design value, resulting in the floor, the next cold, heat uneven. Heating system imbalance is a common problem. In general, in order to solve the problem that the heat users meet the heat supply standard, a large flow rate and a high head pump are set to cause the overheating of the hot users and the serious waste of heat. When the temperature is small, the power consumption is greatly increased and the running cost is increased. (2) The reasons for the horizontal imbalance can be summarized as follows: (1) The heat network design usually only notices the necessary pressure head of the most unfavorable point (usually at the end of the system), while the pressure head pressure of other points is always greater than needed Value, the closer the position of the heat source, the greater the head of the pressure head. If the heat network is put into operation without careful and scientific adjustments, the flow distribution will inevitably deviate from the designed state, leading to the user's uneven temperature (usually the near-end overheating and the far-end not-heat) level imbalance. (2) The heating area is enlarged. Some pipe sections of the heating network have not enough capacity to circulate the pipelines, and the pipe network is not changed in a timely manner. Instead, only the water pump (increasing the flow and lift of the water pump) can also cause the imbalance of the heating network. ③ In the heating network design reasonable circumstances, the pump selection is too large, the operating flow deviates from the design state (large flow small temperature difference), will lead to heat network level imbalance. (3) The reasons for the vertical imbalance can be summarized as follows: ①Heating imbalance exists among the risers and between the floors in the heating system. Due to the limitation of the specifications of the plumbing system, the design generally can not be completely balanced. The differences in the natural rams of the loops affect their degree of unbalance (or increase or decrease). ② according to the design of isothermal temperature and choose the size of the radiator and the radiator size restrictions on operating limits. ③ operating temperature and flow deviate from the design conditions. 2. Countermeasures to solve the system hydraulic imbalance: (1) The solution to the system hydraulic imbalance measures are generally: ①In each inlet to install a good performance regulating valve, put into operation before the initial adjustment. However, system adjustment, especially large system adjustment is very troublesome and time-consuming. This is due to tune the front of the back, tune the back of the front, and to have a portable ultrasonic flowmeter. In the 1980s, Tsinghua University's Department of Thermal Energy developed a scientific initial adjustment software and implementation method, that is, inputting the system into a computer for calculation and adjustment first and then completing it on site. In Beijing and elsewhere, some system adjustments were made and the results achieved good results. ② detailed calculation of the system, the introduction of the mouth of the pipe section to install "resistance ring" to eliminate the remaining head pressure. The disadvantage of this strategy is that when the heat load changes have to recalculate and replace; resistance circle orifice is too small, easy to plug. Former Soviet Union in the heating area to use more. ③ installation of computer monitoring system, the user introduced the mouth section of the installation of electric control valve, the pressure differential for effective adjustment and control, this method is more applied to a network. For example, the Shenyang No.2 Heat Company's heat supply system takes the 200MW double-suction unit of Shenhai Thermal Power Plant as the main heat source, with an annual heating capacity of 40000 million kcal and a peak-shaving boiler room as a secondary heat source, with a designed heating area of ​​900 Million square meters (the actual heating area has more than 10 million square meters). The heating system is indirectly connected and 107 heat stations are installed. Construction started in 1991 and completed by 1997. In 1992, Tsinghua Tongfang Control Engineering Co., Ltd. (former Tsinghua Artificial Environment Engineering Co., Ltd.) RH distributed computer monitoring system to automatically monitor the entire heat network, divided into three phases. In 1993, 39 thermal stations were automatically monitored by the monitoring system. After the heating started, the initial adjustment of the system was completed in only 2 to 3 days. The average temperature deviation of the supply and return water of the secondary thermal network of each thermal power station was controlled within 2 ° C. The flow distribution basically met the user's caloric requirements. Due to the initial adjustment time is short, the heating starts to achieve normal and stable operation. Users are very satisfied. ④ In the introduction of the mouth of the pipe section to install self-operated pressure (flow) regulator or self-balancing valve, in the early run to adjust and lock. This method is used more abroad, the domestic use in recent years, the effect is good. (2) Countermeasures to solve the system vertical imbalance are generally: ①in the heating system riser and radiator inlet branch pipe set good performance regulating valve, and the implementation of the system initial adjustment. Less investment, but the deviation caused by the operation of the vertical imbalance still can not be resolved. ② In the heating system to set the balance valve vertical pipe, radiator inlet manifold temperature control valve set, is the ideal countermeasure. Foreign used more. More investment. 3. Self-balancing valve application results: self-balancing valve is developed by our own equipment. Its principle of action and foreign self-flow control valve basically the same. However, its structure than the foreign self-flow control valve simplified, the comparative test showed that its performance close to foreign self-flow control valve, but its price is much lower than self-flow control valve, the user affordable, it is worth promoting. Last year, Yantai Minsheng Community Heating System and Rongcheng Heating Company Cultural Station and Dongcheng District Heating Plant installed two heating systems Hebei Wen'an HVAC Energy Equipment Factory production of self-balancing valve, after a heating season shows that energy A good solution to system level disorders. Not only improve the quality of heating but also achieved good results and economic benefits. The following only Rongcheng station as an example: Station is a heat station thermal power plant steam as a heat source. Heating area of ​​120,000 square meters, sub-east, south and northwest of the three branches, connecting 91 hot users. In addition to the end and the introduction of smaller pressure drop is not set, the water supply or return pipe installed a total of 73 self-balancing valve, accounting for 80% of all thermal users. Comparison of the system as follows: ①Three branches to achieve a balance: the original three branch supply and return water temperature were 5.5 ℃ for the eastern, 9.1 ℃ for the south and 15.2 ℃ for the northwest, indicating a very unbalanced distribution of traffic between them Eastern flow is too large, northwest traffic is too small. After adjustment, the same as the current supply and return, are 13 ℃. Changes in the district before and after the flow changes in Table 3-1: The measured instrument is portable ultra-ultrasonic flow meter. Flow changes before and after adjustments in each zone Area Gross floor area (10,000 m2) Pre-conditioning flow (t / h) Adjusted flow (t / h) Eastern 1.6 80 40 Southern 8.0 4.0 320 Northwest 2.6 40 60 Total 12.2 530 420 ② The user's circulating water basically reaches the set value, the heating effect is greatly improved. Solve not hot users 15,000 square meters, pass rate of 98%. Nowadays, with the exception of a few buildings that have not yet reached room temperature due to problems in indoor system design, they have to be further resolved. Most of them have met the standard requirements and the masses are satisfied with it. Adjusted near-end user traffic is significantly reduced, Table 3-2 is pumping test example. Before and after adjustment User flow changes at the near end of the table Building name Building location Heat building area Before the regulation of the flow After the adjustment of traffic One canteen South trunk 1 Extension 1 user line 1535 square meters 10.2t / h 4.0t / h Trade union quarters South Main Line 3 Extension 1 user 1096m2 7.8t / h 3.0t / h Insurance Company 2nd Line of East Route 1600m2 6.0t / h 3.2t / h Adjusted Unit Heating Area Circulating Water 2 ~ 3 Kg / h, most of them are 2.5 kg / h, and 3.5kg / h for individual users (such as veteran quarters). The portable flow meter ultrasonic flowmeter is used to check the set value and the measured value. For -7% ~ + 8%. ③ significant economic benefits: This year's winter and last winter operation of the comparison, not only to improve the quality of heating but also made the following economic benefits. Saving circulating water pump electricity is about 70,000 yuan: last year, run two 30kw pumps, this year only run a 45kw pump; increase the user heat up to 188,000 yuan; in the case of last year's steam consumption flat, increase the heating area 10,000 square meters. Only the two income and expenditure savings amounted to 258,000 yuan. The installation of flow regulator investment is 126,000 yuan. That year not only can recover the investment, but also need to increase revenue. So this year we have to transform the four systems. 4. Thermostatic valve application temperature control valve is a room temperature control into the radiator flow to maintain the needs of users of the control valve. Not only can effectively solve the vertical imbalance, and users can adjust their room temperature as needed to achieve energy saving. The following only cite Yantai Minsheng Community pilot point two buildings exactly the same 20 Zhongxing Street and No. 11 Zhongxing Street comparison test to illustrate. The systems of these two buildings are all single-tube systems with crossing pipes. On the 20th of Zhongxing Street, MNG thermostatic valves are installed in front of each radiator, while No. 11 Zhongxing Street remains the same. On January 4, 1998 at 9:00 am to 10:00 am at room temperature spot checks. At that time the heating parameters 68/47 ℃, outdoor temperature -2 ℃. The test results are shown in Table 3-3. Room temperature record for each room (℃) Building No. 1F 2F 3F 4F 5F 6 Zhongxing Street 20 18.5 18.0 19.0 18.5 19.5 20.0 Zhongxing Street 11 17.0 19.0 20.0 21.5 23.5 24.0 IV. Conclusion 1. A few suggestions: (1) Metering charging is not only necessary for heat to enter the market as a commodity, but also an important measure to encourage users to save energy. The relevant departments should formulate their policies as soon as possible in stages and in batches. From now on, upon request, the new heating system must be proposed in the design of metering and charging programs and set the appropriate metering devices; existing heating system should be based on the actual situation of the study and development of effective measurement and charging program, a planned, Rebuild the system and install the metering device step by step. (2) Residential metering charges involve a wide range of issues, issue a large amount of workload. From the pilot's point of view, the installation of metering devices at the inlet of the heating system, the internal use of apportioned method is currently a priority program. In the radiator with a thermostat installed on the system, you can ensure the same room temperature under the conditions of the share of the area; install the thermostat in the radiator system, you can also install the heat distributor to be apportioned. (3) The level of heat supply system imbalance is an important factor affecting the quality of heat supply and energy waste. The use of computer monitoring system and the setting of self-balancing valve can effectively solve this problem should be promoted. From the current situation, large and medium-sized heating systems are generally used indirect connection, a network should set the computer monitoring system and to achieve the hydraulic balance between the thermal stations; secondary network (including the direct connection system) should be in the user system Inlet port to install self-balancing valve and use it to achieve the balance between the user system. 2. Acknowledgments: Many of the materials in the text come from Yantai City Heat Office, Minsheng Community Heating Co., Ltd. and Rongcheng Heating Company. Due to time and level restrictions, it is inevitable that there is something wrong, please correct me. Program code NO. Building No. Hot inlet with total heat meter Hot inlet with differential pressure control system Standpipe mounted Balance valve Radiator with thermostatic valve Radiator Heat distributor Radiator Hot water meter Gross floor area m2 Remarks S1 ZTE 23 Yes Yes Yes Yes Yes Yes 865.4 S1 ZTE 24 Yes Yes Yes Yes Yes 865.4 S2 ZTE 20 Yes Yes Yes 865.4 S2 ZTE 21 Yes Yes Yes Yes 865.4 S3 Dongxing 9 Yes Yes Yes Yes 865.4 S3 Dongxing 12 Yes Yes Yes 865.4 S4 Dongxing 8 There 865.4 S4 Dongxing 11 865.4 D1 Dongxing 26 Yes Yes Yes Yes Yes Yes Yes 742.0 D1 Dongxing 29 Yes Yes Yes Yes Yes Yes 742.0 D2 Dongxing 28 Yes 742.0 D2 Dongxing 27 Yes 742.0 Program code NO. Building No. Dec. 31, 1997 1998 January 15, 1998 January 31, 1998 February 16, 1998 March 1, 1998 March 16, 1998 Record period Heat consumption Total MWH Heat consumption per unit area S1 ZTE 23 8.80 17.45 28.38 37.52 42.72 49.21 40.41 24.63 S1 ZTE 24 8.39 17.64 28.69 38.20 43.84 50.05 41.66 25.39 S2 ZTE 20 9.35 17.24 28.63 38.24 43.30 49.49 40.14 24.46 S2 ZTE 21 9.03 16.75 26.82 35.25 39.94 45.92 36.89 22.48 S3 Dongxing 9 6.72 17.21 28.18 37.45 42.52 48.74 40.02 24. 39 S3 Dongxing 12 10.53 19.62 31.35 41.64 46.89 54.53 44.00 26.82 S4 Dongxing 8 8.29 16.84 27.76 37.20 42.26 48.40 40.11 24.45 S4 Dongxing 11 9.75 19.91 32.49 43.16 48.57 54.79 45.04 27.45 D1 Dongxing 26 7.45 14.92 25.26 33.96 38.63 44.36 36.91 26.24 D1 Dongxing 29 7.21 14.90 24.54 32.95 37.23 43.66 35.45 25.20 D2 Dongxing 28 2.36 6.39 17.20 26.40 31.25 37.13 34.77 24.72 D2 Dongxing 27 8.06 16.61 27.20 36.23 40.71 47.04 38.98 27.71 days 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 External temperature ℃ - 2.60 -1.90 -3.90 -7.70 -5.48 -3.78 -1.58 -0.78 -3.87 -4.79 -2.21 -0.04 -0.34 -1.77 -0.58 1.81 0.50 day 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 月 Average outer Temperature ℃ 0.78 1.87 1.08 -0.30 2.18 4.45 1.51 -1.34 0.59 1.80 7.22 4.22 3.20 1.83 3.79 -0.17 Solution Code Building No. Unit Area Heat Consumption Measured Value Unit Area Heat Index Estimated Value Energy Saving Rate% S1 ZTE 23, ZTE 24 30.61 40 .43 8.22 S2 ZTE 20, ZTE 21 29.76 39.31 10.76 S3 ZTE 9, ZTE 12 31.97 42.23 4.13 S4 ZTE 8, ZTE 11 33.35 44.05 0.00 D1 Hing 26, Dongxing 29 32.54 42.98 6.41 D2 Dongxing 28, Dongxing 27 34.77 45.93 0.00 Area Gross Floor Area (10000sqm) Pre-conditioning Flow (t / h) Pre-conditioning Flow (t / h) Eastern 1.6 80 40 Southern District 8.0 410 320 Northwest District 2.6 40 60 Total 12.2 530 420 Building name Building location Heat building area Before adjustment Flow rate After the traffic One canteen South trunk line 1 Extension 1 user 1535 Sq. M 10.2t / h 4.0t / h Trade union quarters South Main Line 3 Main Line 1 user 1096m2 7.8t / h 3.0t / h Insurance Company 2nd user of Donggan Line 1600m2 6.0t / h 3.2t / h Building No. 1 Level 2 Level 3 Level 4 Level 5 Level 6 Zhongxing Street 20 18.5 18.0 19.0 18.5 19.5 20.0 Zhongxing Street 11 17.0 19.0 20.0 21.5 23.5 24.0