AdCept Technologies Pvt. Ltd.

HVAC/R Systems Monitoring

Heating, ventilation, and air conditioning/refrigeration (HVAC/R) systems regulate thermal comfort
inside of buildings and maintain adequate air quality by circulating and replenishing interior air withfresh outdoor air. Building operators and mechanical contractors who oversee these systems strive toensure that HVAC/R equipment is running efficiently so that a proper interior environment is sustained
and operating costs held at reasonable levels.
To achieve better performance from HVAC/R systems, interior monitoring can provide valuable
feedback in terms of system operations, leading to insights for correcting inefficiencies and optimizing
equipment. Monitoring can also identify opportunities for energy efficiency upgrades and provide
validation for improvements that contribute towards LEED certification.
Our IoT solution, comprising of data loggers and sensors, enable accurate monitoring of interiorconditions, helping building professionals diagnose mechanical issues, locate sources that compromise
comfort, and better balance healthy and comfortable interior environments with energy costs.

Challenges in maintaining Indoor Air Quality in Centrally Airconditioned Malls, Schools, Apartment Buildings and Offices
For facilities managers ensuring proper air circulation in buildings have always been a top priority.
However, plagued by the Covid-19 pandemic, the facilities managers recognized that this year air quality
would play an even more important role in maintaining a healthy environment. Due to health challenges
posed by the pandemic, there’s a need to be proactive in employing a solution that allowed them torepeatedly test and monitor all HVAC systems to ensure maximum performance required for optimalfresh air circulation. Monitoring carbon dioxide (CO2) levels indoors would help ensure proper
circulation of fresh air, while reducing stagnant air that might retain virus particles.
Additionally, every big facility typically generates Lakhs in utility bills each year. High per square footutility bills are a high price to pay, even if the HVAC system is relatively new. In keeping with a national
push to bring greater energy efficiency, it is essential to analyze motor utilization, a first step toward
cutting energy costs. To accomplish the above, energy consumption data are required to be collected
over a period of time, besides recording the temperature, relative humidity, CO2 levels, motor runtimes, and electricity usage.

Advanced Technology Solution
We recommended IoT-enabled data loggers for convenient measuring and recording of CO2,temperature, and relative humidity in buildings. . The data collected from the loggers enables
performance optimization of the buildings’ HVAC systems to ensure that indoor air quality is conducive
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to health and safety standards. We employ a data-driven approach to achieve these goals, deploying
variety of portable data loggers throughout the facility to collect energy consumption data in addition torecording temperature, relative humidity, CO2 levels, motor run times, and electricity usage.

Typical System Components
IoT Data Logger
The IoT gateway is a Microcontroller based product with GSM interface forconnecting field instruments with cloud. It collects real time data from field
instruments and pushes data to cloud server. Data stored at cloud server canbe viewed from remote places. The gateway stores data in local non-volatile
flash memory in case of network issue and sends data to the server whennetwork connection is restored to avoid data loss. It supports MQTTProtocol.
The data logger supports the following measurements: 4-20mA, AC Current,AC Voltage, Air Velocity, Carbon Dioxide, Compressed Air Flow, DC Current, DC Voltage, Differential
Pressure, Gauge Pressure, Kilowatts (kW) and Temperature.

Split-core AC current Sensor / Motor “ON / OFF” sensor
A split-core sensor is used to record AC amperage, for use with the datalogger with an input of AC current, sine wave, single phase 50 Hz or 60 Hz,
load power factor 0.5 to 1.0 lead or lag. Senses power induced from line
voltage using self-gripping split-core design for faster installation. These
are available in 5 ranges - 20, 50, 100, 200 & 600 Amps. This is used toestimate electrical draw on the motors. We use the runtime data toestimate actual kilowatt hour usage for each motor.

Differential Air Pressure Transducer Sensor
The transducer can measure either air pressure or velocity with the flip of a switch. It isavailable in three installation configurations: duct, panel, or universal. Duct and panel
models have two pressure and velocity range options: 0-1" WC / 0-3,000 ft./min or 010" WC / 0-7,000 ft./min, with seven field-selectable sub-ranges for pressure and eightfor velocity. All variants are available with and without display. It has an IP65/NEMA 4
environmental rating.

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Indoor Carbon Dioxide - Temp - RH Data Logger
Indoor CO2, RH and Temperature logger makes it more convenient than everto measure and record CO2 in buildings and other non-condensingenvironments. It measures CO2 from 0–5,000 parts per million (ppm).

Motor Temperature Sensor
The temperature probe works with data loggers. The digital temperature andhumidity sensor is a temperature and humidity combined sensor that has beencalibrated to provide digital signal output. The sensor includes a capacitive sensor
wet component and a temperature measurement device and connected with ahigh-performance 8-bit microcontroller. The ultra-small size, low power
consumption, signal transmission distance up to 20 meters or more, makes it thebest choice of even the most demanding applications in a variety of applications.

System Architecture
IoT-enabled data logger measures and records levels of CO2, temperature, and relative humidity inbuildings and it works with an app on either a mobile phone or tablet so users can access data andconfigure audible alarm notifications of the logger. With the built-in gateway functionality, data can becollected from the logger and automatically sent via Ethernet, WiFi, GPRS, 3G or 4G communications toa cloud-based platform. The cloud data can be viewed anywhere at any time, simply by logging into an
online user account, which can also be set up to send alarm notifications via text or email should
conditions exceed user-set thresholds.

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