"Radiant Heaters for ceiling mounting"
ECOSUN Radiant Heaters for ceiling mounting Radiant heaters Radiant Cassettes Applications Standard models of radiant heaters Advantages Theory Specifications Installation ECOSUN Ranges Radiant panels are manufactured in two basic designs: 1) High-temperature panels ECOSUN S - are equipped with flat radiation surface which guarantees radiation from up to 180° angle ( so called hemispheric radiation ). Temperature at the surface of radiating segment is approx. 350°C. This high temperature enables relatively high density of radiant flow. That is why these panels are designed for suspending in high places 5- 8 m.Plane surface emitter is designed to provide environment heating 2) Low-temperature panels ECOSUN - have also flat radiating area. Contrary to high-level panels is the surface of radiating area max. 110°C. Density of radiant flow is lower. Recommended height of panels placement is 2,5-3,8 m. Radiant Cassettes Applications The radiant cassette is designed to provide environment heatingronment heating The radiant cassette is used for total, or additional heating in thermal insulated buildings : Multiple-purpose buildings buildings which are not continuously occupied with ceiling heights from 2,5 to 8,0 meters Applications: * public offices and administrative offices, company seats, schools * cultural facilities, show-rooms * medical arrangements * commercial and sales centres * manufacturing halls and warehousessuch as shops, industrial premises, gymnasiums, exhibition halls, etc. Plane surface emitter emitter Hemispheric radiation (Radiant cassette) Radiant Cassette Environment comfort heating by ECOSUN 24°C Convection discomfort heating system 20°C 22°C Radiant Cassettes Advantages the surface of the radiant panel radiates a flow whose spectrum lies mostly in the band of wavelengths greater than 5 micrometers, and is thus absorbed to a large degree by the human body: people are thus heated in a manner similar to objects. when the radiant flow heats objects up to a level of 20-22°C, heat comfort can be achieved even with air temperatures of 18-19°C, and this leads to energy savings of at least 18-24%. radiant panels make temperature distribution in a room vastly more vertically balanced – only a -1 to -2 degree difference between the floor and the ceiling (for convection heating, meanwhile, the difference is given as 1°C per mere 30-50 cm of height). there is less flow (whirling) of air in the heated space, so dust particles also whirl less, thus reducing the risk for a number of illnesses—asthma, mucous membrane infection, etc. a higher wall temperature means a lower possibility for surface condensation; room humidity is not lowered. Radiant Cassettes Advantages glass is not ―transparent‖ (we might say ―transthermant‖) when it comes to radiation with wavelengths over 3 and thus the radiant flow is not lost through windowpanes. the panels do not need any maintenance sounder environment with higher air moisture does not lead to mucosa membrane drainage and respiratory diseases has positive effect on people affected with arthral diseases full possibility for machines, furniture etc. placements long service life no emission, thrifty way of dealing with life environment high thermal comfort Infrared radiant heating is most suitable for wall dehumidification in room (for example caused by flood) Cassettes solve the problem of cold spots and isolated work areas. Cassettes do not dry out the air ensuring a pleasant working environment Isolated work areas in factories, work stations, warehouses etc. Hospitals, Xray tables neo-natal units, burn units, receptions, waiting rooms etc. Ecosun High Temperature Cassettes resolve problem of deicing planes in cold hangar areas at the John Lennon Airport, Liverpool. Radiant Cassettes Theory ECOSUN radiant heat cassettes work in a similar way to the radiant heating action of the sun gently warming the surfaces of objects and people in the room. This is a gentle, natural comfortable heating system that offers may advantages over conventional convection heating systems. 2.5 m 2.0 1.5 1.0 0.5 0 20 º 22 º 24 º 26 º Basis of radiant heat transmission • each object with certain temperature has some inner heat energy. • Heat energy is changing into electromagnetic oscillation which extends through space. If there is no heat supplied to the object, it cools down. • When electromagnetic oscillation hits other object, it is absorbed by its surface and changes into heat energy. If the heat is not taken away from the object, it heats up. • Electromagnetic oscillation is not bound to outer environment ( medium) it can proceed even in absolute vacuum • Most famous heat transmission via radiation is natural sun radiation heating the Earth HEATING RADIATION • Transfer of heat energy from one body to another through the space which separates them . (Heating of Air is only secondary!!!) • Using electromagnetic waves as transfer vector Ideal Ecosun Convected heat Ceiling level Convected Ecosun Ideal heat 16º 19º 23º 18º 20º 22º 19º 20º 21º 20º 20º 20º 21º 21º 19º 22º 22º 18º 16º 18º 20º 22º 24º Floor level Radiant Cassettes Specifications Radiant Cassettes ECOSUN S specifications Proportion of energy radiated 70% ! Average surface temperatures up to 350°C 1, 2 or 3 heating units Unitary power 900, 1200, 1800, 2400, 3000, 3600 W Very high installation ( for whole area heating 5 to 8 m, for zone heating 3,5 to 4,5 m). Covering IPX4 ECOSUN S Radiant Cassettes technology Thermal reflecting panel (rock wool insulation) covered with sheet metal varnished body Heating element (aluminium segment with pressed-in heating rods) High emissivity surfacing underside „SILICATING“ Technology Radiant Cassettes ECOSUN specifications Average surface temperatures 90 -110°C Covering IP20, IP44, IP54, IP65 Unitary power 100W - 700W high installation (2,7 to 3,8 m). ECOSUN Radiant Cassettes technology Thermal reflecting panel (rock wool insulation) covered with sheet steel metal body Heating element (a heating foil or a heating cable) THERMOQUARTZ TradeMark layer -the highest possible absorption of heat (of heat radiation) from the heating board THERMOCRYSTAL TradeMark layer-the highest possible efficiency of heat energy radiation Radiant Cassettes Installations How to design output, numbers and location of radiant cassettes? 1. Calculate heating loss of a specific area Q(W) 2. Select heating mode in accordance with the character of a future object operation Systematic heating mode with good level of heating comfort: heat passage coefficient to (U): walls < 0.5 W/m2K, floors at terrain < 0.5 W/m2K, ceilings < 0.35 W/m2K. Higher values to (U) increase operating costs and decrease heating comfort ! How to design output, numbers and location of radiant cassettes? 3. Total input of all heaters set up to 20% higher than calculated heating loss because of higher heating system dynamics: P= 1,2 * Q [W] to check the input size for area unit, whereas applies P/S<150W/m2 S ......... floor surface of an area [W] How to design output, numbers and location of radiant cassettes? 4. Set minimal number of heating units n for creation of homogenous radiant field n> S/H2 H .......... expected installation height [m] The more heating units enable heating comfort but increases acquisition costs!!! 5. Calculate average input of one heating unit and from output line of appropriate type select closest face-value Specify number of heaters according to total input: Pn = P/a » Pjm n = P/Pjm How to design output, numbers and location of radiant cassettes? 6. Propose scheme of even location of individual panels. It is necessary to respect frame distances and even distances of panels according to scheme figure: Minimum distance to wall 100 cm H = mounting height How to design output, numbers and location of radiant cassettes? 7. Determine installed height according to frame recommendation in table or through the use of nomogram: Usually mounting height : 300 W 2,7 to 3,2 m 600 W 3,0 to 3,8 m 700 W 3,0 to 3,8 m 900 W – 1200W 4,5 to 6,5 m 1800 W – 2400W 5,0 to 7,0 m 3000 W – 3600W 6,0 to 8,0 m Minimum mounting height • Vertical asymmetry of radiated < 12°C. • If this temperature difference is : – between 8 and 12°C, the environment is qualified as slightly uncomfortable, – less than 8°C, the environment is considered to be comfortable. How to design output, numbers and location of radiant cassettes? In case of systematic heating mode with lower level of heating comfort is possible to provide „zone heating“ by radiant cassettes. ZONE HEATING is a mean of heating when only exposed, relatively small areas ( case of little heated halls ) are heated with radiant heat. Application of zone heating • heat passage coefficient of an object cover k (U) > 2W / m2K • Interrupted heating mode in objects heated for short-term stay of people (mainly churches, concert halls in historical objects etc. with high ceilings, social halls) These large area objects are very expensive to heat in interrupted mode with conventional heating devices such as storage heaters, convectors and various types of "radiants". These high operation costs are caused by the fact that it is necessary to heat very huge air content from low temperatures up to demanded temperature (comfort). And this all in relatively short time period. Because radiation heats the air only secondarily from radiated objects, comfort environment can be reached in such areas much faster. Therefore radiant heating is for interrupted mode of heating much more effective. Assembly Low temperature radiant cassettes ECOSUN • Supply cords, 1 m long, lead out of the panels. The panels can be installed directly on ceilings using a fastening frame. • They can also be installed in coffer ceilings (in grids) or by hanging on ropes or chains. The figure below show how the panel should be installed Assembly High temperature radiant cassettes ECOSUN S • These panels can be installed directly on ceilings using the attachment frame (which is part of their installation kits) • or by hanging them on ropes or chains. The panels are connected during installation to a terminal box placed on the side of each panel. These terminal boxes each have two outlets to enable the interconnection of cables inside them. CAUTION: The SURROUNDING TEMPERATURE (temperature of surrounding air) near an ECOSUN radiant panel may not exceed 30°C. El. supply • The radiant heaters from 300 W to 1200 W are supplied in 230V • 1800 W and 2400 W are supplied in 230/400V 2N • 3000 W and 3600W are supplied in 230/400V 3N Regulation by room One thermostat only to control all radiant heaters in the same room There must be a suitable control system such as : A moduling electronic ambient thermostat A control system device limiting their operation according to the exterior temperature and modulating interior temperatures The 5 conditions for a quality radiant heating The installed power of heating is equal to the thermals losses of walls and air change by the premises increased by 20 %. In thermal insulated buildings The heaters power in accordance with the mounting height. Radiant heaters must be installed horizontally A homogeneous layout of radiant heater Effective ECOSUN S radiant cassettes applications in practice Prague Castle Gallery Market hall Production hall Effective ECOSUN radiant cassettes applications in practice Newsagent´s Restaurant Office Contact us : FENIX Trading s.r.o. Slezska 2 79001 Jesenik, Czech Rep. Tel/Fax: +420 584 495 304/303 E-mail: firstname.lastname@example.org Web: www.fenixgroup.cz