DEH software (Energy need of air conditioning units)

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Paula Goodman
8 years ago
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1 DEH software (Energy need of air conditioning units) The software DEH calculated not only the entire energy needs of air-conditioning units, but also the operating costs (heating, cooling, electricity, water), the payback period for 3 different energy recovery systems and the CO2 savings. Therefore the knowledge of the true meteorological data is of a central importance. Without HR With CC-System With Plate-HE With Rotor-HE ADA ADA ADA Meteorological data for Europe The meteorological data according to DIN 7 of January 3 for 15 zones, which were assigned to cities, are outdated. They represent the means in the period and shall be construed as legal basis for calculations, although extreme years have not been taken into account and in the meantime the climate has changed significantly. Therefore calculations, based on this outdated data, resulting to high heating and a to small cooling need. For this reason, with the software DEH the meteorological data for cities in Europe, which represent means for the period from 1995 to 5. Whit this data, rudimentary calculations can be made, explained with an example of Stuttgart. The height of the station is 297 m, the height in the centre is 5 m and the amount for the urban area extends from 7 m to 59 m. Therefore, accurate calculations with individual meteorological data must be done. Meteorological data worldwide Records for 7 hours can be determined, for example, with the software Meteonorm from of the outdated period from and for the more recent period from Because it is warmer and wetter in future, will need appropriate corrections can be made to a more realistic energy need and the resulting operating costs can be determined. Although everyone knows, that cooling is more expensive than heating, for determining the cooling cost, often the electricity price was divided by the COP of the refrigeration plant, causes that cooling energy would be cheaper than heating energy, what is total nonsense of course, but we think only of the capital costs and extras. MDI software Therefore with the software MDI, we offer an interface for global meteorological data which is help to create representations according to DIN 7, based on annual records for 7 hours. The global warming after IPCC can be used for planning, for future periods to be considered. For the assignment of the service hours are available comfortable typing tables for day and night. Example for the determination of service times Principally the whole year, but with the following restrictions: Not at all weekends. Not in last July and in the first August week (holidays). Not in last December and in the first January week (holidays). The determination of the times for reduced air flow and the part of fresh air in function of the outside air temperature is defined in the software DEH.

2 ADA ADA ADA Point of referece Winter C % g/kg Summer C % g/kg Volume flow humid m3/h Mass flow dry kg/h Definition Height over sea level m 5. Pressure hpa 99.3 Temp. C. Rel. humidity %. Phone: Ittigen, Indication Return air Adiabate return air cooling Exhaust air Recirculated air Outside air After heater After cooler Humidifier Supply air Heat recovering Comfort area ( DIN 19 ) ADA,, ( C ) / ( C ) ( C ) 2 / ( g/kg ) ,, ( g/kg ) ( g/kg )

3 Temp. - Abs. humidity - DIN 19 Climate data Software Meteonorm - Station Frankfurt ( 5. m / 9.2 C /. g/kg ) Outside air ( Day ) Outside air ( Night ) Phone: Ittigen, Return air Supply air Comfort area ( DIN 19 )

4 Need of energy without CC-System Phone: Maximal values Volume flow humid m3/h Mass flow dry kg/h Heating + Humidification kw Ittigen, Cooling + Dehumidifying kw Humidification x 1.5 kg/h Dehumidifying kg/h Service/Air flow Air (%) Service (h) Total (h) Definition (h) Day ( ) 1.. '' '' Night ( ) '' '' 3.. Outside air flow rate (Day) Outside air flow rate (Night) ( C) Day (%) Night (%) Auxiliary energies h-total m3/h Pa kw : Fan : Fan Damper ---. ( Pressure drop total ) ( Pressure drop total ) SFP (Specific Fan Power) Recom. Effective ( + ) W/(m3/s) < W/(m3/h) < Water Day Night Total % : Humidification t : Humidification t : Dehumidifying t : Dehumidifying t Need of energy Day Night Total % : Heating MWh : Heating MWh : Cooling MWh : Cooling MWh : Fan MWh Damper MWh : Fan MWh Accessory MWh Need of energy total MWh

5 Costs without CC-System Day Night High rate Low rate Definition ( WMO ) Time Hours total h.. Daily hours h.. Night hours h.. Phone: Humidification ( / t ) EUR.... Dehumidifying ( / t ) EUR Heating ( / MWh ) EUR.... Cooling ( / MWh ) EUR Ittigen, Electric energy ( / MWh ) EUR.... Costs without CC-System (%) : Humidification : Humidification : Dehumidifying : Dehumidifying : Heating : Heating : Cooling : Cooling : Fan Damper : Fan Accessory Costs Day Night Total % : Humidification EUR : Humidification EUR : Dehumidifying EUR : Dehumidifying EUR : Heating EUR : Heating EUR : Cooling EUR : Cooling EUR : Fan EUR Damper EUR : Fan EUR Accessory EUR Costs total EUR

6 ADA ADA ADA CC-System-Winter Temperature efficiency % 7. Efficiency humid %. Capacity sensible kw 2.9 Capacity latent kw. Capacity total kw 2.9 SA-He Inlet Outlet Definition Phone: Temp. C -... Rel. humidity % Volume flow humid m3/h Velocity m/s Ittigen, Pressure drop Pa. RA-Co Inlet Outlet Definition Temp. C. -.. Rel. humidity % Volume flow humid m3/h Velocity m/s Pressure drop Pa % Et.glycol SA-He RA-Co Temp. in C Temp. out C Volume flow m3/h Mass flow kg/h Pressure drop kpa Mollier-t/x-Diagramm for Winter (2.9 kw) Mollier-t/x-Diagramm for Summer (1.5 kw) 2

7 ADA ADA ADA Need of energy with CC-System Phone: Maximal values kw % Ittigen, Heating + Humidification Total CC-System Diff Cooling + Dehumidifying Total 25.. CC-System Diff Need of energy Day Night Total % without CC-System MWh : Heat recovering MWh : Cold recovery MWh : Fan-CC-System MWh : Fan-CC-System MWh Glycol pump MWh Net useful ratio MWh Auxiliary energies h-total m3/h kpa kw : Fan : Fan Damper.31 Glycol pump (CC-System) Glycol pump (Accessory) SFP (Specific Fan Power) Recom. Effective ( + ) ( Pressure drop total ) ( Pressure drop total ) W/(m3/s) < W/(m3/h) < Water Day Night Total % : Humidification t : Humidification t : Humidification t : Dehumidifying t : Dehumidifying t Need of energy Day Night Total % : Heating MWh : Heating MWh : Cooling MWh : Cooling MWh : Fan MWh Damper MWh : Fan MWh Accessory MWh Glycol pump MWh Need of energy total MWh ( Water )

8 ADA ADA ADA Costs with CC-System Day Night High rate Low rate Definition ( WMO ) Time Hours total h.. Daily hours h.. Night hours h.. Phone: Humidification ( / t ) EUR.... Dehumidifying ( / t ) EUR Heating ( / MWh ) EUR.... Cooling ( / MWh ) EUR Ittigen, Electric energy ( / MWh ) EUR.... Costs with CC-System (%) : Humidification : Humidification : Humidification : Dehumidifying : Dehumidifying : Heating : Heating : Cooling : Cooling : Fan Damper : Fan Accessory Glycol pump Costs Day Night Total % : Humidification EUR : Humidification EUR : Humidification EUR : Dehumidifying EUR : Dehumidifying EUR : Heating EUR : Heating EUR : Cooling EUR : Cooling EUR ( Water ) : Fan EUR Damper EUR : Fan EUR Accessory EUR Glycol pump EUR Costs total EUR

9 ADA ADA ADA Economy with CC-System Capital-interest %. Energy-increase % 3. Inflation % 2. Support costs % 5. Investment-costs without CC-System EUR with CC-System EUR Additional costs EUR Overheads Support costs (+) EUR Energy costs (-) EUR Ittigen, Energy costs (+) EUR Energy costs -3.3 % EUR 1599 Amortization BEP (Break even point) Years 3.7 Phone: Summer Adiabate return air cooling Hours 57 Capital costs Life cycle Years 15 Investment-costs EUR Energy costs EUR Support costs EUR 5 Overheads EUR 3713 Capital costs EUR 73 Economy with CC-System Incomes/Expenses (EUR) Years Incomes Expenses Yield EUR EUR EUR 2 Amortization (Years)

ADA ADA ADA Economy AHU supply air + AHU return air with CC-System Costs EUR % Energy costs without CC-System 11.5 93. Support costs without CC-System 3..2 Overheads without CC-System 11.5. Energy costs with CC-System 253.

10 ADA ADA ADA Economy AHU supply air + AHU return air with CC-System Costs EUR % Energy costs without CC-System Support costs without CC-System 3..2 Overheads without CC-System Energy costs with CC-System Support costs with CC-System Overheads with CC-System Phone: Ittigen, Net useful ratio with CC-System Need of energy MWh % Need of energy without CC-System 33.. Need of energy with CC-System Net useful ratio with CC-System CO2-Reduction MWh t CO2 Thank you!!! Energy from brown coal ( kgco2/mwh) Energy from hard coal (33 kgco2/mwh) Energy from heating oil (27 kgco2/mwh) Energy from natural gas ( kgco2/mwh) Sonderfall Schweiz MWh % Need of energy = Sensible heat - Outside air Need of energy 5..3 Gross useful ratio with CC-System : Fan-CC-System 3..7 : Fan-CC-System 3..7 Glycol pump Net useful ratio with CC-System ETV=75.2/( ). Der sensible Wärmebedarf der ist nicht vergleichbar mit dem totalen Energiebedarf. Nicht berücksichtigt sind: Latenter Wärmebedarf der (Befeuchten im Winter) Sensibler Wärmebedarf der (Heizen im Winter) Latenter Wärmebedarf der (Befeuchten im Winter) Sensibler Kühlbedarf der (Kühlen im Sommer) Latenter Kühlbedarf der (Entfeuchten im Sommer) Sensibler Kühlbedarf der (Kühlen im Sommer) Latenter Kühlbedarf der (Entfeuchten im Sommer) Adiabate Befeuchtung der (Leistungssteigerung der Kälterückgewinnung im Sommer) Gesamter Elektro-Energiebedarf für Zuluft- und Abluft-Ventilatoren sowie diverse Hilfsaggregate

Sound pr. (db(a)) Phone: +90 216 394 12 82 Pressure hpa 960.075. Fax: +90 216 394 12 87 Capacity kw 1200.000

Sound pr. (db(a)) Phone: +90 216 394 12 82 Pressure hpa 960.075. Fax: +90 216 394 12 87 Capacity kw 1200.000 Hybrid-Re-Cooler V-2x8 - Offer no. 1328 Sound power (db(a)) Sound pr. (db(a)) Company Schenkel & Partner GmbH 1 Branch Ingenieurbüro Street Bahnhofstrasse 44 Country/ZIP/City 8 Zürich Installation Credit