SOLAR COOLING WITH ADSORPTION CHILLER

Transcription

1 SOLAR COOLING WITH ADSORPTION CHILLER organization / project coordinator (address, telephone, ) Dr. Hans-Martin Henning, Fraunhofer Institute for Solar Energy Systems ISE, Heidenhofstr. 2, Freiburg, Germany, PHONE: ++49 (0) , FAX: ++49 (0) , hans-martin.henning@ise.fhg.de partnership (names, affiliations, contact information) Universitats-Klinik Freiburg type of project Demonstration period of project (start-end) Completed (dd/mm/year): 01 / 01 / / 09 / 2002 status of project (mainly r and d projects) Field test project objectives (mainly r and d projects) Supply of Chilled Water for a laboratory in a hospital building by using CFC-free and FC-free cooling technology, Reduction of pollutants and CO2-emissions by using solar energy to supply a thermal driven cooling process, Quantitative analysis of the adsortion technology, Quantitative analysis of the integrated solar energy system,development of a design guideline for solar assisted adsorption cooling systems project overview (deliverables, future work) Several diploma thesises, Interim reports, Final Report

2 performance (cop-graph, capacity chart etc) Figures: a) Performance of the solar collector field - daily values in August 2002 b) Performance of the Adsorption chiller - daily vaules in August 202Remarks:After an advanced configuration of the operation management the performance of the Adsorption Chiller meets COP values of 0.60 in the nominal design point.

3 application Air conditioning, Laboratory building in a hospital (Klinikum Freiburg) Air conditioned floor area [m²]: < 550 location and relevant weather data City: Country: Latitude [deg.]: Longitude [deg.]: Altitude [m]: Freiburg GERMANY Summer Winter Average Mean daily global horizontal solar radiation [kj/m²day]: Mean outdoor temperature [ C]: Mean outdoor humidity [%]: Indoor temperature [ C]: system classification Working fluid: Cooling tower type: Adsorption H2O Wet Cooling process: Closed system / technology description Adsorption machine supplies cold water for a Water-to-Air-Heatexchanger implemented in the supply air stream of a Air Handling Unit. Cooling operation is requested by the control if the room temperature of the Laboratory is higher than 23 C. Part-load operation states are preformed by a three-way-valve in the cold water cycle. Unique Cooling supply for the Laboratory; without Cooling Back-Up, Only thermal Back-up by using the district steam network, Low supply temperature ~ 65 C for the Adsorption machine, Advanced configuration of the operation managment of the adsorption unit (load controlled switching period of the internal adand desorption chamber)

4 system diagram / drawing / pictures

5 solar system backup system performance data I. chiller/ refrigerator data Thermal: Average operating temperature [ C]: Other: Reporting period (dd/mm/year): Water heating, Flat (evac. tube), Stationary 80 Existing steam distribution/ net work Operation 01 / 05 / / 12 / 2002 I.1 standard performance The heating medium is: The cooling medium is: The cold medium is: Water Water Water Supply [ C] Return [ C] Flow [m³/hr] Heating medium temperature and flow rate: Cooling medium temperature and flow rate: Cold medium temperature and flow rate: Machine (chiller or refrigerator) capacity [kw]: Electricity demand [kw]: Thermal COPth: I.2 non-standard (part-load) performance Daily COP values up to 0.65 [annual consumption] Chilled water storage size [m³]: Water consumption [m³/yr]: Gas consumption [N.m³/yr]: Electricity consumption [kwh/yr]: III. solar system Annual solar radiation on collector plane [kwh/m²]: [solar thermal] Solar collector area [m²]: Tilt angle (0 =horizontal): Average collector efficiency [%]: Collector optical efficiency coefficient (Co): Collector heat loss linear coefficient [W/m².K]: Collector quadratic heat loss linear coefficient [W/m².K²]: Heating medium flow rate [m³/hr]: Solar buffer heat storage size [m³]: Maximum useful temperature of heat storage [ C]: Azimuth angle (0 =South, -90 =East): Absorber general [annual energy sums] Required total (solar & backup) heat [kwh/yr]: Required heat (heating, humidification) [kwh/yr]:

6 Delivered cold (cooling, dehumidification) [kwh/yr]: Total solar radiation incident on solar collectors [kwh/yr]: Delivered gross energy from solar collectors [kwh/yr]: financial data Total investement, excluding VAT [EUR]: [breakdown] Solar collector array with support structure [EUR/m²]: Solar thermal storage [EUR/m³]: Chiller / Refrigerator [EUR/nom. cap.]: Chilled water storage [EUR/m³]: Backup heater [EUR]: Total installation cost (excluding component costs) [EUR]: Monitoring, control, etc. [EUR]: Subsidies [EUR]: Operation and maintenance [EUR]: Other costs [EUR]: [energy & water costs] Electricity (energy price) [EUR/kWh]: Electricity (peak power price) [EUR/kW]: Fossil source (Natural gas) [EUR/N.m³]: Water [EUR/m³]: comments In section GENERAL: monitoring data of 2002