Our Knowledge Series papers comprise of industry and product information, useful articles on developments in HVAC technology and applications. It will be our constant endeavour to provide you with tips and inputs on better undertanding of intelligent and green HVAC systems.
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NEW KNOWLEDGE SERIES PAPERS
DESIGNING BUILDING INTAKE AND EXHAUST FOR OPTIMUM INDOOR AIR QUALITY
In modern buildings, indoor air quality is an important parameter. However the common premise that outdoor air is 'clean' cannot be farther from truth. Because outdoor air quality varies due to proximity of other buildings, local pollution sources like traffic or industries etc. Similarly building exhaust re-entrainment too is a common occurance.
Thus design and location of building intake and exhaust and selection of appropriate louvers assume critical importance.
VALIDATED CORROSION CONTROL IN SESITIVE ELECTRONIC FACILITIES
Degradation of electrical control equipment by corrosive gases is a well-known effect. In fact, virtually all manufacturers of sensitive electronic/electrical equipment specify the required environmental conditions for their equipment as part of the warranty conditions. These specifications set limits for temperature, relative humidity and chemical contaminants as they all influence the rate of corrosion.
Installation of air filters or treatment systems by themsleves do not have the capability to take care of the certain aspects.
ARCHITECTURE INSPIRED AIR OUTLETS
The architecture and inspired interiors of modern working spaces demand air distribution products which combine maximum engineering performance with impeccable aesthetics. The performance parameters include higher airflows at lower noise levels with ease of installation built in.
So the solution does not lie in fabricated air distribution products but engineered solutions that also call for careful selection.
PREVIOUS KNOWLEDGE SERIES PAPERS
VALIDATED INFECTION CONTROL IN BUILDINGS
Most infections (including COVID19), are transmitted either by direct contact (surface to surface) or by droplet emission caused by coughing, sneezing or even normal breathing and talking. Direct contact transmission can be controlled by good hygiene practices, social distancing,disinfecting surfaces and use of PPEs as suggested by WHO & ICMR.
However, it is the microbes expelled through droplets that pose a challenge in any closed or indoor environment. This paper outlines how to overcome this challenge.
DAMPERS FOR SEVERE ENVIRONMENTS
Dampers in the HVAC system are designed to perform various functions such as volume control, directional airflow, shutoff and isolation in case of eventualities. Severe operating environments warrant special materials and construction, higher leakage ratings and better operational capabilities.
Since the operating environments vary from critical to severe, less than optimum containment or sub par function can have drastic implications.
HOW TO ACHIEVE EFFECTIVE CONTAMINATION CONTROL
Ambient air quality outside in most cities is now degraded to harmful levels. Indoor air has always been found to be more toxic than outdoor, due to occupancy, building materials, stored goods, activities in the buildings etc. The problem is further compounded by inadequate ventilation.
Commonly promoted solution of installing air purifiers or treatment systems fail to address the issues like Infiltration & Exfiltration, Optimised Room Air Movement and Demand control Ventilation.
ENSURING OPTIMAL INDOOR AIR QUALITY
CO2 concentration inside buildings can go upto several thousand ppm. Intervention research has shown that higher levels of CO2 in indoor settings are associated with slower work performance, impaired decision making, increased absenteeism.
The answer? Ventilation systems with built-in energy recovery that will keep your energy costs in check while ensuring optimum ventilation.
ON DEMAND VENTILATION FOR CAR PARKS
The main factors determining the characteristics of a parking ventilation system is the approximate number of cars serviced on a daily basis and the nature of construction of the facility that it caters to.
Discover the essentials of an intelligent system that can monitor and control ventilation while optimising your energy costs at the same time.
ZONE REGULATION OF OUTDOOR AIR IN HOTEL ROOMS
Comfort and luxury are two main criteria for planning facilities in hotels. Typically energy costs of a an average five star hotel consume up to 18 per cent of its revenue. HVAC systems account for upto 40-45 per cent of this chunk.
A key requirement thus becomes the HVAC system that will determine the temperature and quality of indoor air. The idea is simple, save energy, save revenue, hence more profit.
IMPLEMENTING FIRE & SMOKE CONTROL
Fire Dampers are required by all building codes. A basic requirement of building fire protection is the compartmentation of of buildings to contain any fire to its zone of origin and prevent it's spread through the HVAC system.
Smoke Dampers on the other hand can be effectively deployed to control and shut off the circulation of air and smoke as part of an Engineered Smoke Control System.
CONTAMINATION CONTROL THROUGH PRESSURISATION
Proper room pressurisation is critical for preventing unwanted air transfer. In chemical and biological research facilities chemical fumes and airborne biological agents must be prevented from migrating out of laboratory rooms to non-laboratory areas.
The answer lies in maintaining a differential pressure relationship, Discover a number of possible approaches to design such a system.
CLIMATE CONTROL WITHOUT WIRES
With increased demand for intelligent and efficient climate control systems, more and more HVAC installations deploy VAV/VAQ terminals. However, installation of these VAV terminals with thermostats and sensors present numerous challenges.
Doing extensive wiring in confined spaces, integration with BMS, not to mention the challenges in operation and maintenance of this system. Together these add to to more labour, more cost and long and delayed implementation. We present a solutions that cuts through this clutter.
HOW TO CHOOSE THE RIGHT AIR OUTLET
Contrary to popular perception a grille is not merely a standard fabrication item, but a product of engineering perfection that determines it's life, performance and aesthetics.
Choice of an appropriate grille/diffuser is based on a number of considerations, ranging from air delivery requirements, size and height of the space, sound levels and appearance.
IMPLEMENTING NOISE CONTROL IN HVAC SYSTEMS
The HVAC system during its operation generates a number of sounds at various stages. All these sounds add up and often exceed the threshold of tolerance and are thus interpreted as noise.
For a silent and noise free HVAC system, there are some simple guidelines that can help you identify and understand the sources of noise and minimize their effect.
BIG LEAP IN DEMAND CONTROLLED VENTILATION
A blueprint for efficient and intelligent HVAC systems that monitor the requirements and make adjustments accordingly to affect significant energy efficiencies and at the same time provide optimal ventilation rates.
In this article we have discussed the various approaches both traditional and new, with illustrations and outlining their advantages and drawbacks.