Heat Recovery Ventilator LG ventilation system for clean and comfortable indoor life!!! Eco V TM
Ⅰ.What is a Ventilation system? Ⅱ.IAQ Management Policy (Korea) Ⅲ.Basics of Ventilation Units Ⅳ.Ventilation Products / Design Ⅴ.Installation Case 1/33
Ⅰ What is a Ventilation System? (eco V) 2/33
Ⅰ What is Ventilation System? Types of Indoor Pollution I.A.Q : Indoor Air Quality becomes 2~10 times more harmful to human body when affected by harmful building materials and chemicals in interior finishing Smoking &Combustion Gas CO NO2 PM10 Micro Dust Clothing & Shoes Carpets & Beddings Respiration Germs Fungi Mites CO2 VOC (volatile organic chemical) Rn HCHO (formaldehyde) O3 Building Materials and Paintings Electronics & Furniture *VOCs : Volatile Organic Compounds SHS : Sick House Syndrome, Symptoms : Slight Drowsiness, dizziness, headache, pneumonia, lung cancer 3/33
Ⅱ IAQ Management Policy Current I.A.Q Management Policy (Korea) Public Facilities Air Ventilators Pollution Sources Management New Collective Housing * Koreans Consider of decreased ventilation (36%), pollutants emitted from construction materials (27%), inflow of outdoor air pollutants (25%), people activities (12%) as major factors of Indoor Air pollution (Cyber Poll for 2,213 people in Dec. 2003) - Ministry of Environment 4/33
Ⅱ IAQ Management Policy Current I.A.Q Management Policy (Korea) Controlled Facility Ministry Relevant Act Goal Public Facilities & New Collective Housing Ministry of Environment Act on indoor Air Quality Control in Public Facilities, etc Management of 17 types of public facilities including underground stations Offices & Work Places Ministry of Labor Industrial Safety and Health Act Standard of the Industrial Health Regulation Management of indoor air quality in office and work places Schools Ministry of Education and Human Resources Development School Health Act Management of indoor air quality in schools Public facilities Ministry of Health and Welfare Public Health Control Act Management of public facilities including performance halls Parking lots (under 2,000 m2 ) Ministry of Construction and Transportation Parking Lot Act Management of indoor air quality in parking areas 5/33
Ⅲ Basics of Vent Units Classification of Ventilation Type Ventilation type can be classified depending on the process of exhaustion or supplement. It is classified in to three types of class 1, 2 and 3. Alternating ventilation systems are recently introduced. Ventilation Type 1 Supply Fan Indoor Exhaust Fan Supply fan and Exhaust fan The pressure in the room can be controlled by two fans Ventilation Type 2 Supply Fan Indoor Natural Exhaust Fresh outdoor air is mechanically supply The room is in positive pressure ex) surgery room, clean room Ventilation Type 3 Exhaust Fan The stale air in the room is mechanically discharged Natural Supply Indoor The room is in negative pressure ex) kitchen, bathroom 6/33
Ⅲ Basics of Vent Units Classification of Ventilation Type Ventilation can be classified as central ventilation or individual ventilation depending on their control station location. Also, there is a blended version, floor zone type. 2-way Valve Pressure Valve Lounge Store Floor Radiators AHU FCU Store Cooling Tower Chiller Boiler Hall Office [ Central Ventilation] [ Floor Zone Type] [ Individual Ventilation ] 7/33
Ⅲ Basics of Vent Units Heat Recovery Ventilation Types Heat Recovery Ventilation is a system to recover lost heat energy at indoor and outdoor space in order to mange energy effectively. Heat recovery ventilations are classified into Enthalpy Heat Exchanger and Sensible Heat Exchanger depending in their heat exchange device material. Heat Energy Recovery Humidity Intrusion (Summer) Humidity Exhaust (Winter) Warm Area Condensation Ventilation Plan Cold Area Condensation Heat Exchange Device Contamination Enthalpy Heat Exchange - Enthalpy return is big because of sensible & latent heat exchange via humidity exchange. - More than 50% of humid outdoor air is exchanged thus controlling indoor humidity. 40~50% of humidity is constantly maintained because more than 50% of indoor humidity are exchanged. Bathroom needs a separate ventilation No condensation occurs - Exchange element becomes humid transmitting, making it hard to condense - It may condense under -15 Celsius but it can be prevented with intermittence operation - It s not easily contaminated because humidity is transmitted with osmotic pressure Sensible Heat Exchange - Enthalpy return is relatively small because it only performs sensible heat exchange - Indoor humidity is increased because all the outdoor humidity are not filtered - Indoor room becomes too dry because all the indoor humidity are exhausted - A bathroom included into the ventilation plan - Considerable amount of condensation in winter - Condensation and Freezing occurs easily - It may be problematic in cold areas because condensed water could freeze and block the ventilation port. - Outdoor unit/ventilation temp difference will result in condensation and allow germs to breed. - Left over humidity will contaminate the surface and cause decrease in exchange rate. Also, it is hard to clean. 8/33
Ⅲ Basics of Vent Units Heat Recovery Ventilation System Comparison Types Sensible heat exchanger Total enthalpy heat exchanger EA RA EA RA Flow OA SA OA SA Exchange Material Effect on supply air (Summer case) Usage Countries (main) Only Heat Aluminum Low temperature & same absolute humidity For summers : Low humidity For winters : High humidity Northern Europe Both Heat and moisture Paper/fiber Low temperature & lowered absolute humidity For summers : High humidity For winters : Low humidity Mid East, East Asia Heat movement Water vapor 9/33
Ⅲ Basics of Vent Units How Heat Recovery Vent System Saves Energy 10/33
Ⅲ Basics of Vent Units W.H.R.V System Comparison for Heat Recovery Rate 11/33
Ⅲ Basics of Vent Units Vent System Energy Recovery Efficiency Calculation Enthalpy heat exchange system can be used to expect high energy efficiency compared to vent system or sensible heat exchanger. Also, it is more than 39% efficient than sensible heat recovery system concerning heat recovery rate and price. System Type Simple Vent Sensible Vent Enthalpy Vent System Summary Simple ventilation with wall fans and such without heat exchange Forced or simple heat exchanger with PP element Heat and humidity exchanger with special pulp materials Heating and Cooling energy consumption caused by the ventilation Recovery Rate Cool 100% (6.63 kw/h) 87% (5.77 kw/h) 51% (3.38 kw/h) Heat 100% (12.79 kw/h) 41% (5.22kW/h) 33% (4.22 kw/h) Cool 100% (0.86 kw/h) 378% (3.25 kw/h) Heat 100% (7.57 kw/h) 113% (8.57 kw/h) Annual Recovery Rate 93,000 KRW (classroom) 129,000 KRW (classroom) Standard ventilation rate of a high school classroom in Seoul with 30 people capacity,800 CMH. It can be seen with the above result that Enthalpy ventilation is superior with air conditioning of summer period, which is greatly affected by outdoor humidity. 12/33
Ⅲ Basics of Vent Units Heat Recovery Vent System Principals Heat Recovery Ventilation System is Fan only ventilation Enthalpy heat exchange ventilation 25% Energy saving Compared to fan only ventilation, enthalpy heat exchanger Eco V economizes electricity bill. Environment friendly by energy saving. 13/33
Ⅲ Basics of Vent Units Structure of Heat Recovery Vent System 14/33
Ⅲ Basics of Vent Units Heat Recovery Vent System Comparison Heat Recovery Vent Units is classified into Flat-Plate Heat Exchangers Type & Heat-Transfer Wheel Type depending on their operating types. Flat-Plate Heat Exchangers Type Heat -Transfer Wheel Type Operating parts are not easily affected No germs due to the steam pressure humidity control simple structure, simple maintenance high heat exchange rate Germs may breed with its humidity absorption exchange system Lowered ventilation amount due to the installation space and fudge wind Complex structure, professional maintenance required. 15/33
Ⅳ Vent Products / Line up 250 CMH 350 CMH 100/150 CMH 1500/2000 CMH 350 CMH 1000 CMH 500 CMH 800 CMH 16/33
Ⅳ Vent Products / Model Nomenclature Format The following format shows the nomenclature for all Eco-V model. Meaning of each term in the nomenclature is explained in the table below. L Z - H 0 5 0 6 B A 0 Code Part Mark Marking method 1,2 Product type English LZ :Changwon Ventilator 3 -- -- -- 4 5,6,7 Heat exchanging method Ventilation capacity English Number 8 Power supply Number 9 Product type English 10 Grade 1 2 3 4 5 6 7 8 9 10 11 Number English H : Enthalpy heat (Humidity included) T : Sensible heat (Temperature only) Ventilation air flow: EX) 050 500 CMH & 150 1500CMH 2. 220V, 1 Φ, 60Hz 6. 220~240V, 1 Φ, 50Hz B : ceiling concealed duct type T : ceiling cassette type W: window type Grade according to addition function EX) A basic function. 11 Serial No Number Development sequence (0,1,2...) 17/33
Ⅳ Vent Products / Features and Benefits Energy saving Fresh & clean air Versatile installation Operation modes The indoor air is pre-warm/pre-cool using incoming air thus saving energy and money. Exchange of Wasted heat (sensible & latent both). Ventilation supplies Fresh air & Exhausts polluted air. Filter prevents pollution to enter inside & maintains hygiene. The briefcase-style latches allows easy filter replacement and heat exchanger cleaning. Installation direction is flexible both ways. Heat exchange mode & by-pass mode are available. Easy service Easy accessible and disassembly parts. Networking control Simple, group, central control facilitated. Low Noise Compact size Eco v is acoustically engineered and tested for quiet operation, ensuring that comfort is felt, not heard. Low height for low fall ceiling installations. Control Logics Various Control Logics 18/33
Ⅳ Vent Products / Design Fresh OA supply Humidity Control Deodorization 19/33
Ⅳ Vent Products / Design Upper gallery EA OA outer wall Upper part should concerned Gallery SA RA Parallel OA EA Upper part 180 degree Rotation RA SA 20/33
Ⅳ Vent Products / Design What is kitchen hood synch? Enthalpy Exchanger will operate in synch with the kitchen hood. When the hood is on, Enthalpy Exchanger shift from SA (Inhalation) Strong to RA (Exhaustion) weak automatically. Exhaustion Power Strong Inhalation Power Strong For the smooth ventilation, kitchen vent hood should be synched with Enthalpy exchanger so that inhalation shift to max power and exhaustion power becomes to weak. The high pressure in the kitchen will help smoother ventilation via kitchen hood. 21/33
Ⅳ Vent Products / Design Rapid Vent Button 22/33
Ⅳ Vent Products / Design Anti- Germ Function Heat & Humidity Nonflammable, High Tensile Strength 23/33
Ⅳ Vent Products / Design Yellow dust Filter Deodorizing Filter HEPA Filter HEPA ( high efficiency particulate ) 24/33
Ⅳ Vent Products / Design Filter Cleaning alarm Energy Saving Vent Rapid Vent A/C Control Synch Homenet, PC control 25/33
Ⅳ Vent Products / Design Vent System Operation Mode Normal Ventilation (Spring / Fall) Heat Exchange Ventilation (Summer / Winter) Damper Damper Outside Inside Outside Inside Enthalpy Ventilation Operation Mode : Temp and humidity exchange operation mode during the cold and hot season Normal Vent Mode( 1) Bypass Ventilation ) : An operation mode to perform bypassing RA into the indoor without humidity & heat exchange through a damper within the unit. The operation mode is effective in crowded area such as classrooms and libraries during the mid seasons such as spring or autumn. (Normal vent mode is seized and only Enthalpy vent mode is performed when outdoor temp decrease under 8 ) Automatic Vent Mode: automatic ventilation mode that alternates Enthalpy and normal operation mode depending on the temperature that is detected by a sensor located within the unit (at OA & RA) 1) Bypass Ventilation : A term to describe certain ventilation that involves exhaustion only. * ordinary and automatic mode is only available with models that are higher than 350CMH 26/33
Ⅳ Vent Products / Design Bypass Ventilation Efficiency Analysis [ 800CMH Standard Ventilation Energy Consumption ] Simple Inhalation Enthalpy Vent Ordinary Vent (bypass) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Outdoor air cooling with bypass vent Energy Efficient Period Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Heating Season Inside 22, 50% Change Season Inside 24, 50% Cooling Season Inside 26, 50% Change Season Inside 24, 50% Heating Season Inside 22, 50% Korea Seoul s outdoor temp and humidity analysis You can observe from the data that during the period from mid March to mid June, that air conditioning energy consumption of Enthalpy ventilation is relatively higher than others. This will continue from mid September to mid November and you can see that simple air conditioning is more efficient than Enthalpy ventilation. Outdoor air ventilation is more effective and efficient with crowded interior space like offices and classrooms than residential housings. 27/33
Ⅳ Vent Products / Design Vent System Soundproof Performance Plate type individual vent system is structured with delicate plate gaps. Simple vent system or natural ventilation like opening windows will allow noises from outside to freely enter the space. Because noises are caused with atmospheric vibrations, the air vibration will be reduced while it are passing through delicate plates of plate type ventilation system. Such reduction of vibrations will result in reduced noises. Generally speaking, 80dBA noise level from outside will reduce to 40dBA when it enters indoor via plate type ventilation. 28/33
Ⅳ Vent Products / Design Zero stand-by power (SMPS) Switching Mode Power Supply (SMPS) restricts power Consumption to almost zero in stand-by mode. ez tuning It consists of phase control motor which can provide constant air volume at different static pressures conditions in the duct. Static pressure (mm Aq) 29/33
Ⅳ Vent Products / Design Structure of a Unit Fan for EA Heat Exchanger Element Damper for Bypass Duct Connection Flange Temp Sensor (Outdoor, Indoor) PU Insulator Felt Filter Control Box Fan for SA 30/33
Ⅳ Vent Products / Design Simple Assembly Eco V Unit Remove top panel Remove side panel Remove Support angles Remove Pre filters Remove Heat exchanger Remove fan casing Remove fan assembly 31/33
Ⅳ Vent Products / Design Individual Supply Living room and master bed room shared Return 32/33
Ⅳ Vent Products / Design BELAGIO HomeNet Server Gas Oven Dish Washer Washing Machine Kimchi Fridge Gas Oven Dish Washer Built in Apt & Home Network Washing Machine Kimchi Fridge Outdoor Unit PI-485 G/W VRF Ventilation System 33/33
Ⅳ Vent Products / Design Enthalpy Exchanger application standard 1) 0.6t or heavier zinc galvanized spiral duct (straight piping parts) SA, RA duct insulation not applied (exceptional sites are applied with nonflammable silver foils of PE 5mm or more) 6 2) Soundproof flexible duct - product~main duct connection (1~1.5m) - diffuser connection ( within 1.5m ) Min 60cm Boiler 2 1 2 3) Flexible Duct Outdoor Unit Hood ~ Product connection (within 1.5m ) - OA, EA N/F silver foil PE 10mm or thicker insulation 5 EA RA 4) Round fan type diffuser (A Type with wind direction control function) Move Duct width 3 times in size or more OA SA 5) Rapid ventilation point must be apart at least 3 times the width of minimum duct pipe width 3 4 6) Forced exhaustion type boiler s individual exhaust type must not have an opening within the range of 60 cm, which may allow exhausted gas back in. (Safety standard for metropolitan gas control Article 4-2-3 number2) 34/33
Ⅴ Reference Site Changwon Acrotower Complex Apt - Eco V : 392EA Busan Daewoo Inceheon Songdo Area Condominium Officetel Apt - Eco V : 393EA - Eco V : 2,047EA Seoul Hangang Zai Apt - Eco V : 202EA Whasung Dongtan Area Complex Apt - Eco V : 1,226EA Pazu Munjung Area Daegu Daelim Acrotower Halla Apt Complex Apt - Eco V : 941EA - Eco V : 224EA Changwon the City 7 Complex Apt - Eco V : 1,600EA 35/33
App. Pazu Munjung Halla Apt Installation Checking air flow Dome type Cap Grille Flat Oval Duct at the crossing point Circle type Diffuser End part of a Spiral 75ø 75ø 75ø 100ø 36/33
App. Changwon The City 7 Apt Installation Installation of ERV 250CMH Checking air flow Location of ERV RA Distributor Circle type Diffuser : SA : RA 5 4 3 2 2 1 SA Distributor Installation of clean ducts 1 6 4 3 7 37/33
App. Ventilating Air flow rate Model selection Various methods are used to calculate the required ventilating airflow rate according to CO2 generated by the following a) Inhabitants in a room b) waste gas generated by use of fire c) Other condition of a room. Here are 2patterns of calculating methods. 1.Based on persons in room Requires ventilating Air flow rate( m3 /h) = 25 * persons 2.Based on room size. Requires ventilating Air flow rate( m3 /h) = room volume( m3 ) * number of ventilation required per hour Common Household 0.7~1 Schools 6 15 Eating Place 6 20 Office 6 Inns and Hotels 5 20 Playhouses & movie theaters 6 20 38/33