Climate control functional specifications .docx

FUNCTIONAL SPECIFICATION Greenhouse Climate Control System B 271 – LASR Facility, Naval Research Laboratory (NRL) POC: Jason Geder, Code 1700 POC: Allen O’Hara, Code 1700

1. INTRODUCTION The Laboratory for Autonomous Systems Research (LASR), Code 1700, Naval Research Laboratory (NRL), requires a greenhouse climate control system capable of simulating a Southeast Asian tropical environment. The system must provide precise, automated control of temperature, humidity, air circulation, solar radiation/light exposure. The system must maintain stable plant growth conditions year-round through coordinated environmental control systems.

2. SCOPE OF WORK The Contractor must provide all labor, materials, equipment, software, installation, integration, commissioning, training, documentation, and coordination required for a fully operational greenhouse climate control system. This includes full responsibility for control system installation, integration with existing equipment, network infrastructure, control system configuration, and functional performance validation. The system must not be considered complete until all components operate together in accordance with this specification.

Controlled systems include the heating system, exhaust ventilation, circulation air movement, side, gable, and roof vents, humidity control via fogging, solar shading systems, and outdoor weather monitoring systems.

3. SYSTEM COMPONENTS

3.1 Hardware Requirements The contractor shall provide a complete UL/NEMA-rated control system including all required sensors, controllers, wiring interfaces, necessary for full system operation.

3.1.1 Control Panel: The control panel must include an industrial climate control panel rated for UL/NEMA standards, low-voltage control hardware, relays, contactors, transformers, and backup power supply. These components must be integrated into a unified control assembly.

3.1.2 Indoor Sensors: Indoor sensing must include primary temperature sensors, primary humidity sensors, backup temperature sensors, and solar radiation or light sensors to support environmental monitoring and control.

3.1.3 Outdoor Environmental Sensors (Weather Station): The system must include a fully integrated weather station consisting of ambient outdoor temperature sensors, outdoor relative humidity sensors, wind speed sensors, solar radiation sensors or light sensors , and rain sensors. The Contractor must furnish and install all weather station sensors, mounting mast and structural hardware, enclosures, and all necessary wiring for full integration into the control system.

3.2 Software Requirements

The system software must provide integrated monitoring, control, data management, user interaction, and diagnostic functions to support safe, reliable, and efficient operation of all connected systems.

3.2.1 Real-Time Monitoring: The system must provide real-time monitoring of temperature, humidity, solar radiation, outdoor weather data, and equipment status.

3.2.2 Data Logging: The system must continuously log all environmental and system data with historical storage and export capability.

3.2.3 Automated Control: The system must operate in a fully automated mode with coordinated system logic and configurable setpoints and deadbands.

3.2.4 User Control The system must support full and complete manual override for control capabilities.

3.2.5 Alerts and Diagnostics The system must include fault detection, alarm notifications, to alert the system manager.

3.3 Server and IT Infrastructure The Government end user will provide a dedicated server PC meeting system requirements. The Contractor must install and configure the operating system and control software, configure system settings, and coordinate with software Controls. The control system software and hardware must be capable of supporting remote access functionality if enabled by the Government. The Government shall be solely responsible for all remote access implementation, network connectivity, cybersecurity approvals, firewall configuration, and enterprise network integration.

3.4 Control System Communication The contractor must provide and install CAT6 cables for direct communication between the government provided workstation and the all climate control hardware panels. This must include all connections required for system operation.

3.4.1The contractor must configure controller communication settings to ensure proper data exchange between the control panels and the PC.

3.4.2 The NRL representative shall provide the PC and shall be responsible for its operating system, IT security, general computer/network environment, remote access configuration, and all network infrastructure beyond the direct control system connection.

3.4.3The Contractor shall not be responsible for network infrastructure, remote access configuration, cybersecurity compliance, or enterprise network integration beyond the direct CAT6 connections required for control system communication.

4. Control System Sequence of Operations and Performance Requirements The control system must automatically regulate temperature, humidity, ventilation, and air circulation to maintain stable greenhouse conditions. Equipment shall operate in staged responses based on changing environmental conditions to stay within defined setpoints. The system must also use outdoor data and owner/end user-defined sequences to support coordinated and consistent operation.

4.1 Temperature Control: The system must maintain a target temperature of approximately 80°F. Heating shall activate at 75°F and deactivate at 85°F. Exhaust and ventilation systems must activate at 90°F and deactivate at 85°F.

4.2 Humidity Control: The system must maintain approximately 80% relative humidity. Fogging must activate at 75% and deactivate at 85%. Ventilation must activate at 90% and deactivate at 80%.

4.3 Air Circulation: Air circulation systems must operate continuously, with high mode (8 fans) operation during cooling cycles and low mode (4 fans) operation during stable conditions.

4.4 Ventilation Control: The greenhouse ventilation system must maintain an internal temperature setpoint of 80°F using staged control of roof, gable, and sidewall vents.

At Stage 1 (≥85°F), roof vents must open to 20–30%.

At Stage 2 (≥90°F), roof vents must modulate to 40–60%, gable vents to 20–40%.

At Stage 3 (≥92°F), roof vents must open to 100%, gable vents to 80–100%, and sidewall vents to 60–100%.

As temperature decreases below 82°F, vent positions must be reduced, and all vents must return to minimum position when temperature reaches 78°F, closing in reverse order of opening (sidewall, gable, then roof).

4.5 Shade operation must be based on solar radiation or light levels. Shade setpoints shall be determined jointly by the Contractor and the LASR Facility manager during system programming and commissioning, based on greenhouse conditions, , and site-specific performance objectives. Final setpoints shall be documented and submitted as part of the control system commissioning record.

4.6 Weather Station Integration The outdoor environmental data must be used in control decisions, including wind-based vent restrictions, rain-triggered roof vent closure, and solar radiation-based shading optimization.

4.7 Sequence of Operations The NRL representative shall provide the Sequence of Operations. The contractor must implement the Sequence of Operations, develop and coordinate the control logic with the building automation system controls software, and refine system performance as required. Final system behavior shall be subject to government representative review and approval prior to commissioning.

5. Installation and System Integration Requirements The contractor must remove all existing control hardware and install all new control hardware, sensors, weather station equipment, mounting structures, and associated supports required for a fully functional greenhouse climate control system. The Contractor must furnish and install all control and network wiring, including CAT6 or equivalent cabling required for communication between control panel and the Government-provided PC. All wiring and components must be clearly labeled. The Contractor must install, configure, and integrate all field devices, control panels, and system components to ensure proper operation of all greenhouse systems, including heating, ventilation, air circulation, air cooling, fogging, shading, and weather monitoring. The Contractor must verify equipment compatibility with existing systems prior to commissioning and ensure full system interoperability. All systems must be fully installed, integrated, and operational prior to commissioning and acceptance testing.

8. Documentation The contractor must provide system design documentation, wiring diagrams, Sequence of Operations documentation, installation and commissioning reports, operator manuals, maintenance manuals, training materials, and as-built drawings.

8.1 Control System Documentation The contractor must provide complete control system documentation including control schematics showing all input/output points, controllers, and field devices in the form of system control architecture diagrams.

11. Warranty The Contractor must provide a minimum one-year warranty covering all equipment and hardware supplied under this contract, including installation, wiring, termination, integration, system functionality, and all provided components. This warranty must cover defects in materials, equipment, and installation. All defective workmanship, equipment, or hardware shall be repaired or replaced at no cost to the Government.