D series Duct Burners
16Pages

SUNSRAYS' "D" Series Air Heating Burner and Duct Burner System Application Manual "D" Series Air Heat Burners Shenzhen Sunsrays heating Science And Technology Company Add: Rm. 1308,Shenzhen University Town Business Park,Li Shan Rd., Nan Shan Dist., 518055, Shen Zhen, China Web-site: www.sunsrays.net

Section 2 Design Calculations Section 3 Burner Mounting Arrangements Section 4 "D" series Duct Burner Systems APPENDIX A "D" series Calculation Method & Examples APPENDIX B Flame Lengths APPENDIX C Combustion Air Flow Calculations APPENDIX D Burner Assembly Parts - Isometric View APPENDIX E Pilot, Ignition & Flame Sensing Options

SUNSRAYS "D" series Air Heating Burners and "D" series Duct Burner systems are designed to provide a high efficiency, high turndown, low emission solution for air replacement or "make-up" air heating They are ideally suited to offer precise temperature control for applications such as: • Paint spray booth air heating - spray and bake cycles • Parts dryers • HVAC air replacement schemes for factories, warehouses, distribution centres ... • Crop dryers SUNSRAYS "D" series burner assemblies can either be supplied as: A. Individual units for integration into "customer" designed air heating...

Section 2 Design Calculations SUNSRAYS' DbCalc© software is available to determine burner ratings and to specify minimum duct dimensions/ profile plate designs. Input data required: D. Preferred firing rate (kW or Btu per ft (305 mm) section) SUNSRAYS can help you calculating: 1. Heat input required (kW or Btu/h) 2. Burner length (mm or inches) 3. Minimum duct width & height (mm or inches) 4. Profile plate dimensions (mm or inches) 5. Burner turndown (& minimum achievable heat input) 6. Required air pressure drop across the burner 7. Burner head gas pressure for either natural gas or...

Section 3 Burner Mounting Arrangements For "make-up air" or "air replacement" heating applications, SUNSRAYS' "D" series burners normally operate For spraybooth, dryer or process oven applications it is important that adequate fresh air is available at all times to meet the combustion requirements of the burner. (Refer to Appendix D for combustion air flow calculation It is important to maintain a laminar airflow around the burner and should be located in the centre of the profile. (Any reinforcements used in the profile construction should be located on the downstream side of the profile)....

Heater Installation , Profile Plate Centre Burner Duct Installation Pull-Through Arrangement Profile Plate" Centre Burner Push-Through Arrangement The "D" series burner will also operate satisfactorily when located downstream of the circulation fan. For these applications an "air screen" (see example below) can be located before the burner, to create the required laminar flow. Centre Burner Profile Area

Duct Elbow/Bend Considerations The diagrams below should be used as a guide to the minimum distances that should be allowed to/from outlet/inlet duct bends. Burner Configurations "D" series burners can be configured using a combination of components assemblies as shown below: Maximum length of burner : End inlet (1.5") : 48" (1220 mm) For burner lengths > 78" (1980 mm) multiple rear inlet connections will be required - refer to SUNSRAYS for suitable gas manifold design arrangements.

Typical Gas Valve Train Arrangement Typical Burner Aaoombty (WWMut Mounang note] T^fpèc Ml BuiDffAmMUy (WMi Moniti nj Pista) TYPICAL MODULATING GAS VALVE

Circulation Air Fan Specification Requirements When selecting a circulation fan the available air pressure must take account of the required pressure drop across the burner in addition to all other system requirements.

Section 4 DB Duct Burner Assemblies Typical SUNSRAYS "D" series Duct Burner Assembly 1) "D" series Duct Burner 6) sequencing control panel 7) differential air pressure switch 8) high tempera-ture protection 9) safety shut-off valves

APPENDIX A Calculation Method & Examples SUNSRAYS normally uses the following formula to calculate the required net heat input: Q (kW) = Airflow ( Nm3/s) x Temperature rise (°C) x Air Density x Specific Heat of Air Q (Btu/h) = Airflow (scfh) x Temperature rise (°F) x Air Density x Specific Heat of Air The required gross gas input = Required net heat input/0.92 The gross gas input + firing rate per 12" (305 mm) section will determine the required burner length. Minimum section length = 6" (150 mm). D. Preferred firing rate = 600,000 Bru /176 kW) per 12" (305 mm) section Required net heat...

- 12 - APPENDIX B Flame Lengths (mm) - 12 -

APPENDIX C Combustion Air Flow Calculations SUNSRAYS "D" series duct burners typically operate with 100% fresh air. For applications where a percentage of the heated air is to be re-circulated the a minimum volume of fresh air must pass across the burner. As a "rule of thumb" the volume of air required for operation at 20% excess air is given by: where AirVOL = Air Volume per hour (m3/h or ft3/h) Q = Heat Input (kWorBtu/h) SAGR = Stoiciometric Air/Gas Ratio (m3AIR/ m3 GAS or ft3 AIR/ ft3 GAS) Typical Calorific Values for Natural Gas and Propane are: Stoiciometric Air/Gas Ratios (SAGR) for...

APPENDIX D Burner Assembly Parts - Isometric Views

APPENDIX E Pilot, Ignition & Flame Sensing Options SUNSRAYS "D" SERIES BURNER PILOT ASSEMBLY SUNSRAYS "D" SERIES BURNER PILOT ASSEMBLY