OilonChooser Operating Instructions

Transcription

1 OilonChooser Operating Instructions 1. Menu display and structure OilonChooser s menu display shows the data input field in the central area. The navigation bar is located in the left column. It shows the current position in the program flow (bold) and allows jumping directly to other pages. The current selection results are displayed in the right column. From here the user attains the result output after having selected a burner from the list. The most cost-effective burner is marked as Recommended burner and is preselected by default. As far as possible and reasonable several input variables have been predefined with default values. These values can be changed as per description. Physical units Different units are available for many input variables. Units are easily changed by selection from the drop down list. To enter a new input value with a different unit, first the required unit has to be selected. Then the new value is entered. 3. Error messages Error in data input The program informs by error sign, if a numerical input value is out of limits. The exceeded limit value can be indicated by touching the error sign with the mouse pointer. Continue and Back arrows used for entering the previous or next page are located near the bottom line of the OilonChooser window. The program is cut into 4 main sections: FUEL, BOILER, BURNER and RESULT output. The respective name is informed in the page s headline. 2. Data input No suitable burner available! If the program can t detect any suitable burner at all, a list with all checked burners and the reason for the rejection is shown in the right column. Values Depending on the input variable the data input is carried out either by selecting from a drop down list or by entering of a decimal number. A new value selected from a drop down list will be activated immediately after its selection. In case of a numerical input the activation takes place with the proximate mouse click. After an input value has been changed (and activated), the program restarts the internal selection process and shows the updated results in the right column. The same happens after another page has been entered. Thereby it can be followed promptly how changes of single input data affect to the range of applicable burners. OilonChooser-Operating instructions-english-unreg_v140-rev00 1

2 4. OilonChooser help Info button Several input variables offer a short help text, which can be indicated by touching the info-button with the mouse pointer. door) and the Furnace diameter can be entered. (See chapter 6.1.) Also on BOILER page all default values can be changed as per description above. After the required values have been entered completely OilonChooser detects all suitable burners, which are then listed in the right column. Note: Each variable on the boiler page has to be completed with a valid input value. Otherwise an error message appears and the following pages can t be opened BURNER All input parameters on the following program pages are preset by default. For quick and further information this manual can be opened from all pages. 5. Program sections 5.1. FUEL In the FUEL section the applied fuel type has to be specified. A drop down list with most common standard fuels is available for both fuel gas and fuel oil. After selection of a fuel type additional characteristic fuel parameters appear preset by default. If the required fuel is not included in the drop down list or if the default values don t match exactly to the applied fuel, the input values can be adjusted within a certain range. On BURNER page the operating conditions concerning the combustion air are specified, as well as the requirements for control mode, fuel/airratio control and special equipment of the burner. For applications with preheated combustion air the input parameter Combustion air temperature can be adjusted in the range of 80 C 250 C. In this case the Air preheater pressure loss appears as further input parameter. The drop down lists for control mode and fuel/airration control are updated after each change and offer only those items, for which applicable burners are available. Note: Dual fuel burners are not available for Town gas. Therefore the fuel oil selection is disabled after Town gas has been selected. Town gas disappears from the drop down list, if fuel oil has been specified first BOILER The BOILER page contains all boiler data which are relevant for the burner selection. If the output of a steam boiler shall be input as t/h, the physical unit of the Nominal boiler output has to be changed to t/h steam first. Hereupon other steam related parameters (steam pressure, steam temperature and feedwater temperature) appear preset by default. OilonChooser offers the possibility to check if the boiler furnace provides enough space for the flame. Therefore the Furnace length (incl. boiler OilonChooser-Operating instructions-english-unreg_v140-rev00 2

3 5.4. RESULT The last section that can be attained in OilonChooser shows the final selection results for the chosen burner type. In the first part this printable page informs technical data regarding the selected burner and the oil and/or gas operation for the considered application. Furthermore recommendable accessories are attached. Back and Print buttons are located on top and bottom of the RESULT page. OilonChooser-Operating instructions-english-unreg_v140-rev00 3

4 6. Special input data 6.1. Furnace dimensions OilonChooser offers the possibility to check if the boiler furnace provides enough space for the flame. Therefore the Furnace length (incl. boiler door) and the Furnace diameter can be entered on BOILER page. Note: It has to be checked from the boiler manufacturer to which extend the reversing chamber can be filled with the flame. Boiler door refractory The boiler door refractory has to be adapted in such a way, that the burner head ends flush with the refractory (see draft). For both Furnace diameter and Furnace length incl. boiler door the default value is No requirement. If both dimensions are left at No requirement OilonChooser writes the smallest possible furnace diameter (absolute minimum) and a furnace length, which is adequate to this furnace diameter, as requirements to the RESULT output. In any case this furnace dimension, which is left at No requirement, doesn t affect to the selection process. However the minimum requirement (which depends on the specified furnace dimension) is informed on the RESULT output. Note: In case that both dimensions are specified and both fulfil the flame size requirement apart, the furnace geometry still can be critical, if diameter and length are not in a suitable proportion. In such a case the program creates the message Warning! Critical furnace dimensions with gas/oil fuel!, as remark in the list of applicable burners and on the RESULT output. Furnace diameter Always the clear (inner) diameter of the fire tube has to be entered. Furnace length It s important that the measurement of the furnace length includes the boiler door. OilonChooser-Operating instructions-english-unreg_v140-rev00 4

5 6.2. Further input variables Designation Comment Remark Reference viscosity Oil viscosity based on Reference temperature Nominal boiler output Informed in technical data sheet of the boiler. For the capacity input in t/h (steam boiler), first the unit t/h steam has to be selected. Boiler efficiency Related to the Nominal boiler Informed in technical data sheet of Flue gas pressure loss (boiler) Steam temperature Feedwater temperature Intake air temperature Intake air pressure loss Combustion air temperature Air preheater pressure loss capacity Related to the Nominal boiler capacity Highest air temperature at the fan inlet during burner operation Additional pressure loss on the suction side of the fan (caused by for example air duct channel to the fan, air filtration etc.) Highest air temperature before burner head Total pressure loss (air-sided + flue gas-sided) the boiler Informed in technical data sheet of the boiler Setting range: Saturated steam temperature (Saturated steam temperature + 50K) Setting range: 10 C Saturated steam temperature Setting range: C (preheated) = Intake air temp. ( cold ) OilonChooser-Operating instructions-english-unreg_v140-rev00 5

6 7. Special output data 7.1. Turn down ratio The effective Turn down ratio (TDR) of a burner is limited either by the burner s maximum turn down ratio, by the burner s capacity curve or in case of a gas burner by the operating range of the gas valve block Furnace dimensions The required Furnace diameter and/or Furnace length incl. boiler door are informed in section Important information on RESULT page. See also chapter 6.1. The example chart shows a case where the TDR for gas is limited by the capacity curve and the TDR for oil is limited by the burners max turn down ratio (for oil). In the OilonChooser s result output the Turn down ratio is quoted as factor (TDR = Q max /Q min ). The minimum TDR is limited within the program at 1,5 for 2-stage, 3-stage or modulating burners. Burners with a lower calculated TDR are rejected with the message Turn down ration too small! Capacity curve Pressure reserve Operating point (max. firing rate) Capacity reserve back pressure curve Operating point (min. firing rate) appropriate operating area (max. firing rate) Q min,gas Q min,oil Q max OilonChooser-Operating instructions-english-unreg_v140-rev00 6

7 7.3. Further output data Designation Comment Remark Firing capacity Based on the input Required boiler output (Nominal boiler output for steam boilers) and Boiler efficiency (BOILER page) Required supply pressure (gas valve block) Minimum required gas (flow) pressure at the burner (inlet to gas valve block) in order to Suitable supply pressure range Required supply pressure to booster unit Required supply pressure to burner Max supply viscosity Min supply temperature Max combustion air temperature obtain the calculated firing capacity Gas flow pressure range at gas train inlet where all components of the configured gas train fulfil all selection criteria and technical boundary conditions Based on the fuel oil reference viscosity (atomizing temperature) For modulating burners based on the fuel oil reference viscosity (atomizing temperature). For other burners depending on the oil supply temperature to the burner. Maximum allowed oil viscosity provided at the burner or booster unit Minimum allowed oil temperature provided at the burner or booster unit temperature limited either by the max flow speed inside the burner head or by the absolute maximum (250 C) for hot air burners The preset of a minimum turn down ratio is also considered. Output only for duoblock burners for heavy fuel oil (RP- ME, GRP-...ME) Output only for modulating mono-block burners for heavy fuel oil (RP- M, GRP-...M) Output only when combustion air temperature is set between C. OilonChooser-Operating instructions-english-unreg_v140-rev00 7