November, 11-15, 2025, Eilat, Israel
Archive - Electricity 2017 Archive - Electricity
TPM seat 6
Air supply systems - Air Supply Systems
Thursday | 9.11.2017 | 14:00
TPM 6.1
Principles of ventilation and control of smoke control in car and electric train tunnels
Anatoly Lifshits
lectra M&E
Israel
Air Conditioning Engineer (MA)
education:
1992 Computerized design and drawing course in software Autocad 12
1984 - 1979 Institute of Civil Engineering in Kiev. Specializing in ventilation and heat supply systems And gas. Graduated with honors. Education MA
Trend: Industrial air conditioning
Research: Principles of air distribution in factories with high heat load.
1979 - 1975 School of Construction Technicians in Kiev. Specialization in sanitary systems And technical. Graduated with honors.
Experience:
Engineer in the Department of Air Conditioning, Ventilation and Smoke Management.
Design and execution of heating, ventilation and air conditioning systems in conventional and nuclear power plants, chemical plants, clean rooms.
Supervision of the implementation of the above projects.
Execution of MA projects:
Jerusalem Municipality, Jerusalem Artists' House, Jerusalem Congress Center, Samson Jerusalem Center, Masada Mall, Agrippa Jerusalem Mall, Mevaseret Mall, Meirsdorf Jerusalem, Jerusalem, Grand Court Hotel Jerusalem, Ministry of Foreign Affairs Jerusalem, Gamidsel Laboratories Clean Rooms Kels 1,000 Jerusalem, The Shekels Laboratories Kels 100 Laboratories Jerusalem, Faculty of Nanotechnology - Hebrew University of Jerusalem, Shaare Zedek Hospital Jerusalem Energy Center and Operating Rooms, Shaare Zedek Hospital Jerusalem Children's Hospital, Hadassah Jerusalem Hospital Tower
This lecture will present the building principles of ventilation and smoke release systems in the tunnels of the Tel Aviv-Jerusalem high-speed train line.
Ventilation of the tunnel will be done naturally due to the height difference between the west and the eastern portals which produces the thermal buoyancy effect up or down depending on the temperature inside and from the tunnel.
During normal train operation, the tunnels will be naturally ventilated by the PISTON EFFECT generated by the train while moving along the tunnel, the air will be released naturally through the portals.
During the maintenance period, a ventilation system will operate in order to extract the heat from the condensing units of the complex air conditioners in the plots and create satisfactory environmental conditions for the maintenance staff.
In the event of a fire, by default, JET FANS are automatically activated by the SCADA system depending on the air direction in the tunnel, measured 15 minutes before the event time by AVADT sensors.
All three sensors or the minimum years of them should show the same figure - for the purpose of operating the blowers.
TPM 6.2
Systems DX Super efficient for treating fresh air as an integrated solution for merging large spaces with high efficiency
Ronen Shahar
Gadir Systems Ltd
Israel
Ronen is a B.Sc. mechanical engineer from Afeka College, registered in the Register of Engineers and Architects.
Prior to that, a practical engineer completed a certified air conditioning, the School of Practical Engineers at the Technion, Haifa.
BA in Economics and Management, Jezreel Valley College.
Course in air conditioning systems design - integrates in collaboration with IMMAM.
For the past 7 years, he has been employed as a chief engineer at Gadir Systems, a company that imports, markets and services chillers for refrigeration and air conditioning, air conditioning, heat pumps and hydraulic systems.
Prior to that, he was employed for about 5 years as an air conditioning practical engineer at "BTU", a company that specializes in servicing and repairing air conditioning systems in the business and private sectors.
In the Army he served in the Air Force as a firing systems technician.
Summary
In recent decades there has been a trend of improving the insulation of buildings as well as, supplying fresh air through the air conditioning system. Accordingly, there is a sharp decrease in the demand to treat the thermal load of the shell of the buildings and on the other hand there is an increase in the need to treat fresh air.
The chart below illustrates this trend:
In practice, we witness that the design of air conditioning systems has not changed and is usually carried out using chillers, where the load of fresh air and fresh air is treated in the same system.
Clivet offers a different design based on a unit called ZEPHIR developed by the company and on it are registered a number of patents that allow work with very high efficiency.
The ZEPHIR unit is a 100% fresh air DX package, which includes an on / off compressor and an inverter compressor, with a thermodynamic heat recovery system. In this system, the evaporator battery absorbs fresh air and puts it into a treated and cooled structure to the required level. Excess air emitted from the building is introduced through an air duct into the condensing battery in the ZEPHIR unit. Because the excess air temperature is lower than the ambient temperature, the efficiency increases.
the advantages of the system:
The return air emitted from the building is a stable thermal source over time and saves up to 50% in the power consumption of the compressors.
Continuous control over productivity, allowing for high efficiency throughout all seasons.
Getting Dynamic Free-Cooling - Cost Saving.
Possibility of air drying by heat recovery achieved from the hot gas circuit.
Direct drive without straps of the blower motor while adjusting the engine speed to the air flow requirements in the building - saving 30% operation of fresh air blower.
Thermodynamic heat recovery saves the pressure losses generated by a conventional heat exchanger (air-to-air heat exchanger).
Saving water circulation in the building and saving energy losses in the pipeline.
An electronic filter that filters small particles, bacteria and dust, with low pressure losses compared to a traditional filter - a 10% saving in electricity consumption for air filtration.
Possibility to maintain a constant air flow depending on the amount of CO2 in the patient's space.
We will explain the system diagram in the lecture:
We will present in the lecture a comparative techno-economic model of operating a cell-based system only, as opposed to an integrated system based on super-efficient DX ZEPHIR units.
In the lecture we will briefly raise a number of additional topics:
Screw chillers, water condensers, water heaters for temperatures up to 65 C, to save on heating costs.
Technological improvements in chillers with Class A scroll A compressors
Chillers with a remote condenser for installation in crowded places.
TPM 6.3
Desiccant drying systems for low dew points - design, structure and control considerations
Yehoshua Elizov
Insupco
Israel
education:
B.Sc. In Chemical Engineering - Haifa Technion 1966-1970.
Degree M.Sc. In Materials Engineering - Haifa Technion 1971-1977
Workplaces:
1971-1994: IMI - Military Industry.
1995-2000: A.B. Air Technologies
2001-2017: Insuppo Ltd.
introduction
In this lecture we will focus on the field of air drying by absorbents.
This connection between cooling and air drying means, of course, a close and inseparable connection between the air temperature and its humidity. The only possibility for a complete separation between the treatment of air temperature and the treatment of humidity, is the use of air drying technologies based on adsorbents.
Drying materials
The group of adsorbents as a whole (called SORBENTS), is divided into several subgroups, whose uniqueness is expressed in their ability to adsorb a certain type of substances.
The subgroup of water absorbents is called - DESICCANTS.
This subgroup is divided into two:
ADDORBENTS.
ABSORBENTS.
Characteristics
Typical properties of all water-absorbing materials:
Hydrophilic. ("Water Lovers")
Have very low vapor pressure.
They can be refreshed, that is, by investing appropriate energy the water vapor can be extracted from them Which were annexed and returned to their original condition.
Adsorption processes in a solid desiccant
The simplest physical explanation for all air drying processes is the difference between the water vapor pressures
In the air the water vapor pressure across the descendant. (There are also other explanations related to intermolecular gravity, electric gravity and more, but we will not expand on them here).
In order to have a process of air drying, water vapor pressure on the surface of the desiccant should be lower than that in the air we want to dry. This difference is actually the "driving force" of all existing air drying systems.
The following drawing shows a drying process on a desiccant drying wheel:
Fig. 1: Adhesion process in a desiccant wheel
Systems
Systems based on solid desiccants:
Systems with one adsorbent wheel.
Systems with adsorbent wheel + heat exchanger (rotary or other).
Systems with an antelope wheel.
Applications
The range of applications of air drying technology is very large:
Food factories, pharmaceuticals, electronics, plastics and more, archives, refrigeration rooms, seed storage and more.
We will focus on one of the most challenging applications for the desiccant drying process and that is lithium battery production rooms.
In these rooms maintained at a temperature of 20 degrees, a relative humidity of 0.5% or a dew point of is required
Minus C 40.
We will present, for example, a project in one of the production plants in Israel with an emphasis on all the considerations in designing the drying system while meeting the plant's requirements for maximum savings in operating expenses - especially those related to the refreshing energy of the adsorbent wheel.
Drying equation
The most useful drying equation is:
W = 1.2 * K * (G2-G1)
when are:
W - The amount of water disposed of in the drying unit, in kg per hour.
K - Air flow through the drying unit, in cubic meters per hour.
G2 - The absolute humidity in the air entering the drying unit, in kg of water per kg of dry air.
G1 - The absolute humidity in the air leaving the drying unit, in kg of water per kg of dry air.
1.2 - Weight of cubic meters of air under standard conditions, kg.
Desiccant drying systems
For low dew points - design, structure and control considerations
TPM 6.4
Application of the ILS methodology to improve the availability of the air system in a process facility
Shai Peretz
NRCN
Israel
Shai Peretz, son of a systems engineer at the Nuclear Research Campus
Degree 1 Electrical Engineer B.Sc Graduate of the College of Engineering in the Negev SCE
Degree 2 Nuclear Engineer M.Sc Graduate of Ben Gurion University BGU
Currently studying for a 2nd degree at the Technion in Systems Engineering
Summary
In this article, we will present an application of Integrated Logistic Support (ILS) methodology, in order to improve the availability of the air system in a process facility.
We have chosen to apply this methodology in an important process facility whose mode of maintenance is an important parameter in the process.
The overarching goal of the implementation of the ILS methodology is to achieve the availability goals of the air array at the process facility and the operational readiness from the process facility in operational, safety and maintenance aspects throughout the life of the facility.
Performing such "smart" maintenance will result in an improvement in a number of things:
Management of monitoring and transparency of knowledge for all employees.
Proper and smart management and maintenance of spare parts inventory.
Improving the process at the facility
MTBF as large as possible
MTTR as small as possible
In this article we will present the principles for calculating the availability of the air array.
"Breathing air" systems are designed to produce and supply standard air according to the requirements of a recognized standard for breathing in areas where there is an atmosphere where there is not enough oxygen or toxic substances for human breathing in order to minimize the chance of possible injury and minimize injury.
The breathable air standard we use is the Canadian standard. This standard is the most stringent in the field of breathable air.
The fact described in this paper examines the reliability of the architecture chosen for the application of breathing air in a building, since the derivative ordering a breathing air array is a safety risk that may harm workers' health and therefore the availability of breathing air array should be as high as possible with sufficient redundancy.
The availability analysis is done in two different and independent methods and the results show a very high level of reliability that includes sufficient redundancy.
The system architecture was written according to the requirements of the Canadian standard for breathing air systems. The following figure shows the breathing air system of our system.
TPM 6.5
Pumped storage on Mount Gilboa - ventilation of tunnels and underground structures
Jonny Malachi
Mashav Refrigeration
Israel
Engineer Yoni Malachi
Management, Wind Cooling and Air Conditioning Engineering (1965) Ltd., Israel
background
Serves as Mashav's VP of Operations since 2003. Has been on the company's management staff since 1997.
education
1. Heriot Watt University:
MBA
2. The Technion Israel Institute of Technology:
Bachelor's degree in Mechanical Engineering - BSc. Mechanical Engineering
3. The vocational school for practical engineers and technicians founded by Basmat near the Technion, Haifa:
Certified refrigeration and air conditioning technician and certified electrician
Skills
Operations Management, Project Management, Service Management, Agency Representation, Leadership Strategy and Organizational Culture
Outline:
Methods for storing energy
A pumped energy storage facility on Mount Gilboa
Integration of air conditioning and ventilation systems in a pumped energy storage facility on Mount Gilboa
Table of Contents:
1. Methods for storing energy
A brief overview of different methods for storing energy - thermal storage - cold / heat, compressed air, pumped energy and more.
Basic principle of operation of stored energy storage
2. A pumped energy storage facility on Mount Gilboa
A brief overview of a pumped storage facility on Mount Gilboa
Integration of air conditioning and ventilation systems in a pumped energy storage facility on Mount Gilboa
Integration of air conditioning systems
Combination of ventilation and exhaust systems