ENERGY SUPPLY ANALYSIS Pucioasa city, Dambovita County

Transcription

1 ENERGY SUPPLY ANALYSIS Pucioasa city, Dambovita County -Abstract of Romanian version-

2 CONTENT 1. National Legislation on the energy supply 2. Description of the involved end-users 3. Description of the consumption involved in the analysis 4. Comparison with other offers and conclusions 5. Annexes 2

3 1. National Legislation on energy supply Romanian Energy Regulatory Authority - ANRE is a public independent body of national interest which has regulatory power for approving technical and commercial regulations for the companies, establishing the framework for contracts, setting prices and tariffs for the captive consumers and for natural monopoly segments of the market, monitoring the power market and the compliance with the regulations, authorising and licensing the companies. On the ANRE website are available the list with all authorised suppliers in Romania for electricity and natural gas. The consumers can change the type of regulated tariffs but also the energy supplier (natural gas/electricity). In Romania there are no indications or standards to elaborate the energy supply analysis. The main source of data was: data available on the ANRE website (contract framework, tariffs, electricity and natural gas suppliers, invoices and contracts from Pucioasa Hospital (1 year period), contract and invoices examples from Pucioasa City Hall. Also to make an analysis of the consumer profile at Pucioasa Hospital it was mounted for one month a data logger - Fluke The equipment recorded 4319 data: power (active, reactive, apparent), energy (active, reactive, apparent), power factor (average values for 10 minutes intervals, maximum and the minimum values). 2. Description of the involved end-users The present study intends to perform an energy supply of energy sources contracted by the local authorities of Pucioasa town. It is restricted to electricity and natural gas supply issues. Pucioasa City, with c.a. 42 km 2 surface, is sited in the North of Dambovita County and it has habitants. The local authority has contracts for each consumption point but they receive only one invoice with annexe (for electricity and natural gas). For a detailed analysis regarding energy consumption it was chosen the Pucioasa Hospital asa case study. Pucioasa Hospital with 300 beds is general hospital serving the north of the county and it is one of the largest consumers of electricity and natural gas in Pucioasa City. Use of the energy: electricity for lighting and medical equipmet, equipment (air conditioning equipment, refrigerator, etc.) and natural gas for heating, cooking and laundry. 3

4 3. Description of the consumption involved in the analysis Pucioasa Hospital After the analysis of the contract and invoices for a period of one year it results that the type of tariff for electricity is D tariff (constant flat tarrif) and the average monthly consumption for electricity is about kwh Pucioasa Hospital Nov-09 Dec-09 Jan-10 Feb-10 Mar-10 Apr-10 May-10 Jun-10 Jul-10 Aug-10 Sep-10 Oct-10 Nov-10 Electricity consumption (kwh) active energy reactive energy Month Figure 1. Monthly electricity consumption (active and reactive) for one year (December November 2010) according to the bills Electricity consumption and costs for 1 year period at Pucioasa Hospital is presented in the following table: Consumption Tariff, Cost, Euro euro/kwh Active energy, MWh/year ,833 Reactive energy, MVARh/year Excise VAT - - 6,605 TOTAL ,758 1 Euro = 4.2 lei The measured data built the following consumption profile. The electricity consumption increases sharply starting with 5:30 AM each working day and decreases slowly after 9 A.M. towards 3:00 PM. 1 Tariff since , 1 euro=4.2 lei 2 Excise for commercial consumption 0,50 Euro/MWh, euro = 4,2688 lei for the excise calculation 4

5 Figure 2. The total active load power during one day, resulting statistically from measurements. 144 data -10 minutes interval Other statistical results: The active energy consumed during the measurement (1 month): kwh Reactive power consumed during the measurement (1 month): Kvar Average daily power during the work day : 29 kw Average daily power during the weekend: 18 kw The maximum active power consumption registred instantly 183 kw on August 10, 2011 at 9.19 PM (Wednesday), and minimum is 5.56 kw on August 6, 2011 at AM (Saturday) Maximum average power consumption (average value for 10 minutes intervals) is kw on 22 August 2011 at 8.39 AM (Monday) Minimum average power consumption (average value for10 minutes intervals) 11.6 kw on July 30, 2011, at 3.39 PM (Saturday) Energy consumption for working days is about 700 kwh Energy consumption for weekend is about 420 kwh. The power factor recorded has values between According to the contract the reactive energy is paid by the consumer when the value of the power factor is lower than 0.92 (the neutral power factor). Gas contract According to the quantity of natural gas consumption, the consumers are divided in several categories. After the invoices analysis, it was synthesised the consumption data for the existing 3 natural gas meters. Month Meter 1 kwh Meter 2 kwh Meter 3 kwh 5 Consumption kwh

6 Month/Tariff B4 B3 B1 - Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec The monthly average consumption for the meter 1 is MWh. The tipe of tariff is B4 with a price of natural gas of euro/mwh Natural gas consumption kwh natural gas 0 Jan-10 Feb-10 Mar-10 Apr-10 May-10 Jun-10 Jul-10 Aug-10 Sep-10 Oct-10 Nov-10 Dec-10 Month Figure 3. Natural gas consumption measured by meter 1 during one year (January-December 2010) The natural gas tarrifs are much less diversified than the power tariffs, practically there are no real alternatives to the present variant. A reduction in gas consumption may bring the use of thermal solar panels for hot water, but the effciency of such investment should be carefully considered. 6

7 4. Comparison with other offers and conclusions In order to modell the different tariffs for the electricity consumption for one month it was used the application on the supplier website: and the measurement recorded by the equipment for August. Present tariff is D tariff of electricity cost: 1982 Euro (only the electricity price without VAT, excise taxes) Tariff A energy cost = 2378 Euro Tariff B energy cost = 1795 Euro Tariff C energy cost = 2307 Euro Tariff E1 energy cost = 1983 Euro Tariff E2 energy cost = 1871 Euro The results shows that the B tariff is cheaper than the others regulated tariffs, due to the specific activity in the hospital where the electricity consumption is high in the morning and lower in the evening. 60 Power consumed Tariff D Tariff B 0.25 Power consumed during a work day (kw) Electricity price (Euro/kWh) Hour 0 Figure 3. The present tarriff D) and recommended B superimposed on a typical daily load profile. 7

8 The B tariff is the monomial tariff that differentiates energy on two hourly intervals: the price for the energy during load peak hours ( euro/kwh), which is applied to the energy consumed during load peak hours (7:00 PM to 10:00 PM) and the price for the energy during remaining hours ( Euro/kWh), which is applied to the energy consumed during remaining hours It is estimated that choosing the B tariff it is possible a 10% savings per year, which means approx Euro. For B tariff it requires to have installed a meter that allows metering the power and the energy on times intervals. As shown above, the analysis of the consumption data over a period a time may identify particular regulated tariff which may bring savings. For the public lighting the E2 tariff (day-night) is correctly selected. The consumers are free to change their energy supplier (electricity and natural gas) and to negociante the energy price and the terms of the contract with the competitive supplier. It was also recommended to the local authorithy to negociate the energy price after grouping the consumers in significant packages. 5. Annexes Annex 1. Energy supply analysis, Pucioasa City, Dambovita County, Report, ENERO, October 2011 Note: The above report written in Romanian, has also English translations for the titles of all included tables and figures. Annex 2. Description of the tariffs Annex 3. Example for electricity invoice: Pucioasa Hospital consumption point Annex 4. Example for natural gas invoice: Pucioasa Hospital consumption point 8