IEE Solar Combi + WP3 Virtual Case Studies Actual project stage

Transcription

1 IEE Solar Combi + WP3 Virtual Case Studies Actual project stage Björn Nienborg, Lotta Koch, Edo Wiemken Fraunhofer Institute for Solar Energy Systems ISE 4 th project meeting March 3rd, 2009 Bergamo, Italy Slide 1

2 Content 1. Changes since last meeting 2. Data processing (Excel-Macros) 3. Performance figures / evaluation 4. Overview of results of Sortech simulations Slide 2

3 1. Changes since last meeting Cold distribution - fan coil: 12 C return temperature (formerly 15 C) Heat rejection hybrid cooler instead of dry cooler - reference chilling capacity calculated with 32 C return temperature (formerly 35 C) - >30 C ambient temperature adiabatic cooling (t_amb- 2K) Modified load file: cooling load is accumulated to min. 15% of maximum load. Slide 3

4 1. Changes since last meeting Water consumption: loss factor - wet cooling tower: 30 50%?? - hybrid cooler: %?? Slide 4

5 2. Data Processing 2 macros created by EURAC - import of data into Excel files - processing / combination with user parameters Slide 5

6 3. Performance figures Energetic results and related: - thermal (solar system, chiller, system) - electric - combined (electric efficiency) - stagnation time, water consumption Economic and environmental results; compared to reference system, require user input: - PE - CO2 - combined with costs Slide 6

7 3. Evaluation Proposal at side meeting at ISE (Dec. 08) Preselection: - total electric efficiency > 5 η el, tot = Q cold, demand + Qheat, demand + QDHW, P el demand - stagnation time < 50 Slide 7

8 4. Simulation results Slide 8

9 4. Simulation results Solar Fraction Cooling 0.8 CC FP HC CC FP WC FC FP WC FC FP HC NAP 6OFF 11 16NAP 21R NAP 36 R TOU 51OFF 56 61TOU 66 R TOU 81 R STR 96 OFF 101 Slide 9

10 Solar fraction cooling [-] CC ET HC CC ET WC FC ET WC FC ET HC NAP 6 OFF NAP 21 R NAP 36 R TOU 56 OFF TOU 71 R TOU 81 R STR 96OFF 101 Slide 10

11 Total Electric Efficiency CC FP HC CC FP WC FC FP WC FC FP HC NAP 6 OFF 11 16NAP 21R NAP 36 R60 41 TOU 46 OFF TOU 61 R TOU 81R STR 96OFF 101 Slide 11

12 Total Electric Efficiency 40 CC ET HC CC ET WC FC ET WC FC ET HC NAP 6OFF 11 16NAP 21R NAP 36R60 41 TOU OFF 56 TOU R TOU 81 R STR 96OFF 101 Slide 12

13 Specific collector yield [kwh/m²] CC FP HC CC FP WC FC FP WC FC FP HC NAP 6OFF 11 16NAP 21R NAP 36 R TOU 51OFF 56 61TOU 66R TOU 81 R STR 96OFF 101 Slide 13

14 Specific collector yield [kwh/m²] CC ET HC CC ET WC FC ET WC FC ET HC NAP 1 OFF 6 11 NAP 16 R NAP 31 R TOU 46 OFF TOU61 R TOU 76 R STR 91OFF Slide 14

15 ToDos Finalization of simulations (Sonnenklima,?) Final validation of results Report Sensitivity analysis (control strategy, configuration, ) WP4 Slide 15

16 3.4: System configuration C1 Simulated for: ClimateWell (adapted) Loads Rotartica Sonnenklima Boiler Heating DHW Collector Chiller Cooling heat rejection Source: Fraunhofer ISE Slide 16

17 3.4: System configuration E1 Simulated for: EAW (Solution) Sortech Loads Heating DHW Collector Boiler Chiller Cooling heat rejection Source: Fraunhofer ISE Slide 17

18 3.6, 3.7: energetic and economic evaluation Performance figures of the system: Collector efficiency, collector yield, solar fractions, COP, Environmental performance figures: PEsavings, PE-COP, CO2- savings, PER, Economical figures: Investment costs, annual costs, costs per saved kwh PE,... Primary energy other media Primary energy conversion conversion fossil fuel water fossil fuel solar radiation electricity solarcollector boiler other boiler system boundary: solar assisted system solar buffer DHW buffer chiller, thermal heat supply air-conditioning heat rejection waste heat system boundary: reference system DHW buffer heat supply air-conditioning hot water heating cooling hot water heating other chiller, el.compr. heat rejection cooling Slide 18 electricity waste heat