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Publication Title | 1 RCNY §50-01 CHAPTER 50 DISTRIBUTED ENERGY RESOURCE STANDARDS

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Text | 1 RCNY §50-01 CHAPTER 50 DISTRIBUTED ENERGY RESOURCE STANDARDS | 001



1 RCNY §50-01

CHAPTER 50 DISTRIBUTED ENERGY RESOURCE STANDARDS §50-01 Requirements for the Installation of High-Pressure Natural Gas-Fired Microturbine Systems. (a) General requirements. All microturbine systems shall comply with the following general requirements: (1) Description.

(i) The Microturbine System shall include one or more combustion-based turbine-driven electrical generators with 500 kW or less capacity, natural gas compressing equipment, heat recovery devices, electrical power distribution devices, gas vents or chimneys and associated appurtenances.

(ii) Microturbine systems shall utilize natural gas at an inlet pressure to the system of not greater than 3 psig, and shall boost the gas pressure to an inlet pressure to the combustion device of greater than 15 psig within the unit or room enclosure.

(iii) The total nominal electrical capacity at standardized operating conditions of all microturbine systems located within a single building shall not exceed 2,000 kW.

(2) Listing or MEA approval. For microturbines with external compressors, the compressor shall be MEA- approved and all components of the compressor and the microturbine shall be listed by a nationally recognized testing laboratory approved by the Commissioner. For microturbines with the compressor integrated with other elements into the unit, the integrated unit as well as each of its components shall be listed by a nationally recognized testing laboratory approved by the Commissioner.

(3) Utility ruling. The applicant shall consult the appropriate utility company regarding the characteristics of existing gas and electrical service to the site before installing the microturbine system. The applicant shall provide to the Department prior to plan approval either documentation from the utility company confirming that the electrical interconnection requirements have been preliminarily satisfied or an affidavit from the owner that there will be no interconnection with the electrical grid.

(4) Filing and permit. Plans for the complete microturbine system installation shall be approved by the New York City Department of Buildings and a work permit shall be obtained. A set of the approved plans shall be provided to the Fire Department.

(5) Installation.

(i) Regulation. Installation of microturbine systems shall be in accordance with all applicable requirements of the New York City Building Code, the New York City Electrical Code, and Reference Standards. NFPA 37 shall also apply, except where the Codes or these Rules are more restrictive. Such regulations include, but are not limited to the following: fuel gas piping, egress, fire protection, fire detection, electrical power, ventilation, and gas vent or chimney.

(ii) External compressor. For microturbines with an external compressor, the following requirements shall be satisfied:

A. Gas connections between the compressor and the turbine shall be solid-welded; no threaded joints shall be permitted.

B. A flame arrestor shall be installed upstream of the gas compressor to prevent flame propagating to the natural gas fuel distribution lines.

C. The length of gas piping connecting the gas compressor with the combustion device, both of which shall be in the same room, shall not exceed 12 feet.

(iii) Annunciation. All annunciations shall be provided locally and remotely to indicate any abnormal conditions in the system. The remote panel shall be located in a continuously supervised area on the premises.

(iv) Automatic gas shut-off. Gas supply to the microturbine shall be provided with an automatic shut-off valve that is activated by a malfunction alarm from any component of the microturbine system.

(v) Remotely and manually controlled emergency gas shut-off. A normally closed solenoid gas shut-off valve shall be located immediately after the branch connection providing dedicated service to the microturbine installation. The

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