Screen reader users, click here to load entire articleThis page uses JavaScript to progressively load the article content as a user scrolls. Screen reader users, click the load entire article button to bypass dynamically loaded article content. Volume 62, July 2013, Pages 427–435 The optimization of the operation of a solar desiccant air handling unit coupled with a radiant floor Received 4 October 2012, Accepted 18 March 2013, Available online 25 March 2013•A solar desiccant AHU and a conventional one, both coupled with a radiant floor, are compared.•The paper studies the operation of the desiccant AHU, optimizing the control to minimize the energy consumption.•The desiccant AHU is favourable in humid climates.•The energy consumption is about 35% lower if the solar desiccant AHU is used instead of the conventional one.Dedicated outdoor air systems complement radiant floor to condition large volume enclosures. The air handling unit copes with ventilation loads and with the latent load of the zone to be conditioned.

The floor handles partially or totally the sensible load of the zone. In these systems, the use of a solar desiccant air handling unit can be interesting. The paper proposes a combination of a solar desiccant air handling unit complemented with conventional cooling and heating coils. The objective is to analyse the interest of such an AHU in a real building placed in two different climates in Spain, dry or humid. The control strategy has to be carefully studied because there are many possibilities to reach the required supply conditions to the zone. By means of a physical model implemented in TRNSYS, the interest of the proposed air handling unit is demonstrated in humid climates. Compared with conventional system, the solar desiccant alternative has 35% less of energy consumption. On the contrary, in dry climates the utility of the desiccant wheel is very limited and their use is not justified.Copyright © 2013 Elsevier B.V. Air handling units training With this course you’ll know the technology and composants of air handling units and understand the operation of air mixing boxes.

A level Equivalent to HND. Description of the training Air handling units : Guidance: A basic and easily accessible E-book, necessary for a good understanding of air conditioning, and vital for heat wave periods. Level: School certificate to A level Guidance: This course is useful to all technicians dealing with this type of equipment. It deals especially with air dampers in (mixing) plenums. In training at School certificate level, we will only look at the first 2 paragraphs. Level: A level Equivalent to HND No Reviews found for this course.There is a newer edition of this item. HVAC Equations, Data, and Rules of Thumb, Third Edition Arthur A. Bell Jr Fast solutions to specific problems HVAC personnel face every day. Written by a veteran HVAC designer, this task simplifying guide puts essential HVAC answers at your fingertips. Featuring 200-plus equations, completely updated codes and standards, more than 350 rules of thumb, and other essential data, this is the most complete HVAC reference available.

Title: HVAC: Equations, Data, and Rules of Thumb, Second EditionPublisher: McGraw-Hill: New York, Chicago, San Francisco, Lisbon, London, Madrid, Mexico City, Milan, New Delhi, San Juan, Seoul, Singapore, Sydney, TorontoCopyright / Pub. Date: 2008, 2000 The McGraw-Hill Companies, Inc.ISBN: 9780071482424Authors:Arthur A. Bell Jr is the author of this McGraw-Hill Professional publication.air handling unit requirementsFeaturing 200-plus equations, completely updated codes and standards, more than 350 rules of thumb, and other essential data, this is the most complete HVAC reference available.air conditioner outside unit replacementThis part of the Energy Efficiency Manual shows you how to save energy in dual-duct variable air volume (VAV) air handling systems, also called double duct systems. cost of running an ac unit

VAV dual-duct systems have the potential of being efficient and comfortable, but they often have significant opportunities for improvement. In dual-duct systems, the air handling unit has two coils, a continuously operating cooling coil and a continuously operating heating coil. The cooling coil feeds chilled air into a cold air duct. The heating coil feeds hot air into a hot air duct. The two ducts run in parallel throughout the building. At each space, air is tapped from the two ducts by a terminal unit. The terminal unit has a hot air damper and a cold air damper. When the space thermostat calls for heating, the hot air damper opens. When the thermostat calls for cooling, the cold air damper opens. Efficiency suffers if a terminal unit mixes chilled air with heated under any conditions. The system may be designed to do this deliberately under low conditioning loads to maintain a minimum air flow into the spaces. “Triple-duct” systems avoid air mixing. They are similar in appearance to dual-duct systems.

The main difference is a third duct that carries unconditioned air (a mixture of return air and outside air) for mixing with either the heated air or the chilled air. If properly installed, triple-duct systems have no mixing losses, except for leakage that occurs inside the terminal units. Here are the energy conservation measures for optimizing efficiency in VAV dual-duct systems. The largest opportunity for energy conservation in VAV double duct systems is eliminating any mixing of heated air and chilled air. Also, you can save fan energy by using accurate fan modulation to follow the cooling or heating loads. Variable-speed fans are the favored approach. VAV systems also allow you to use energy saving thermostatic controls, including deadband thermostats and temperature setback thermostats. The dual-duct VAV system design is especially favorable for exploiting the energy saving principle of the outside air economizer cycle. Find the details here.Handbook of Air Conditioning and Refrigeration, 2/e

* A broad range of disciplines—energy conservation and air quality issues, construction and design, and the manufacture of temperature-sensitive products and materials—is covered in this comprehensive handbook. * Provides essential, up-to-date HVAC data, codes, standards, and guidelines, all conveniently located in one volume * A definitive reference source on the design, selection, and operation of A/C and refrigeration systems Title: Handbook of Air Conditioning and Refrigeration, 2/ePublisher: McGraw-Hill Education: New York, Chicago, San Francisco, Athens, London, Madrid, Mexico City, Milan, New Delhi, Singapore, Sydney, TorontoCopyright / Pub. Date: 2001 McGraw-Hill EducationISBN: 9780070681675Authors:Shan K. Wang was the former Deputy Director and Chief Engineer for the Institute of Air Conditioning in Beijing, China. With master's degrees from both Harvard and MIT, and over 50 years in industry, he authored 11 books in the HVAC area. Login for UK Access Management Federation Institutions (Shibboleth)