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Home » Authors » Ionel Petrus, P.E.

Articles by Ionel Petrus, P.E.

pulling floor

Deciphering a Project’s Dehumidification Demands

With a robust array of design options, designers are often tasked with the challenge of deciding which dehumidification methods best suit their projects’ needs.
Ionel Petrus
Ionel Petrus, P.E.
ES-Petrus-ConnorHeadshot-900x550.jpg
Connor Harrigan
June 21, 2022

With a robust array of design options, designers are often tasked with the challenge of deciding which dehumidification methods best suit their projects’ needs.


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air volume (VAV) air distribution systems

Approaching Building Controls a Little Differently

Examining the fundamental differences between the standard control methods described in ASHRAE guideline 36 and a proposed new approach based on AI and casual algorithms.
Ionel Petrus
Ionel Petrus, P.E.
ES-petrus-charming-900x550.jpg
Elena Charming EIT
May 26, 2022

Examining the fundamental differences between the standard control methods described in ASHRAE guideline 36 and a proposed new approach based on AI and casual algorithms.


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Chiller and pumps

The Three Stages to Controlling a Chiller and its Primary-Secondary Pumps

A few potential pitfalls while designing condenser water systems and selecting condenser water pumps, if not avoided, could lead to catastrophic failure or damage to the system and its components.
Ionel Petrus
Ionel Petrus, P.E.
ES-petrus-Vidit-900x550.jpg
Vidit Dabhi EIT, LEED GA
ES-petrus-mohammed-900x550.jpg
Mohammed Fahd LEED GA
April 11, 2022

A few potential pitfalls while designing condenser water systems and selecting condenser water pumps, if not avoided, could lead to catastrophic failure or damage to the system and its components.


Read More
chiller plant

Beware of Faulty Efficiency Claims – Part 2

Ionel Petrus
Ionel Petrus, P.E.
December 10, 2021

Regression-type algorithms learn to approximate a function by ‘seeing’ the data.


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AI

AI-Based Control Algorithms: Sequence of Operations, Deep Learning, Machine Learning, and More

Ionel Petrus
Ionel Petrus, P.E.
February 25, 2021

Sequences of operation, as we have used them for the past decade, will slowly become somewhat obsolete in the next five to 10 years.


Read More
VRF Design

The Proprietary Roadblocks Stunting the Future of VRF Design

Before proceeding with the design of a VRF system, design engineers need to familiarize themselves with all limitations that come with such highly proprietary systems.
Ionel Petrus
Ionel Petrus, P.E.
February 12, 2021

Variable refrigerant flow (VRF) systems have been around for decades, and VRF manufacturers continuously push the limits of energy efficiency with the release of new models. 


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IoT

The IoT in HVAC: Digital Twins, Optimized Sequences, and More

Melissa Lim
Melissa Lim
Ionel Petrus
Ionel Petrus, P.E.
October 30, 2020

IoT technologies are designed to grant facility managers predictive control of a building’s comfort performance.


Read More
A properly designed pump network is critical to the success of any hydronic mechanical system.

The Proper Design Criteria for Selecting the Appropriate Pump

Elena Gowdy
Ionel Petrus
Ionel Petrus, P.E.
August 27, 2020

A properly designed pump network is critical to the success of any hydronic mechanical system. 


Read More
Figure 1

Designing Temporary HVAC: Codes and Loads

As temporary power is often provided in unfortunate situations, maintaining a simple and safe solution is as important as supplying temporary HVAC.
Jacob Pohlman, P.E., LEED AP BD+C
Ionel Petrus
Ionel Petrus, P.E.
April 22, 2020

When building owners want their building systems to be designed for resiliency, the discussion between the owner and the engineers typically includes redundancy and temporary HVAC systems that can support all building HVAC systems or portions thereof. 


Read More
Chilled Water System

Pushing the Boundaries: Heating a Building with a Chilled Water System

Don’t be afraid to test the limits of what can be done with proven technologies.
Ionel Petrus
Ionel Petrus, P.E.
March 30, 2020

HVAC system designers are faced with unique challenges when attempting to design energy-efficient HVAC systems


Read More
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