/[ascend]/trunk/models/johnpye/cavity.a4c
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revision 359 by johnpye, Fri Mar 3 04:47:59 2006 UTC revision 360 by johnpye, Tue Mar 7 03:38:36 2006 UTC
# Line 150  MODEL cavity_losses REFINES cavity; Line 150  MODEL cavity_losses REFINES cavity;
150      h_B, h_N IS_A heat_transfer_coefficient;      h_B, h_N IS_A heat_transfer_coefficient;
151      T_amb IS_A temperature;      T_amb IS_A temperature;
152            
153      - q['B'] = h_B * B * (T['B'] - T_amb);      (* external heat loss *)
154        
155        q_ext_rad IS_A energy_rate;
156        q_ext_conv IS_A energy_rate;
157        q_ext_conv = h_B * B * (T['B'] - T_amb);
158        q_ext_rad = B * eps['B'] * 1{SIGMA_C} * (T['B']^4 - T_amb^4);
159        - q['B'] = q_ext_conv + q_ext_rad;
160      - q['L'] = h_N * N * (T['L'] - T_amb);      - q['L'] = h_N * N * (T['L'] - T_amb);
161      - q['R'] = h_N * N * (T['L'] - T_amb);      - q['R'] = h_N * N * (T['L'] - T_amb);
162    
163        (* Determine 'F_rad' from overall heatloss... *)
164        
165      F_rad IS_A factor;      F_rad IS_A factor;
166      F_rad_1 IS_A factor;      F_rad_1 IS_A factor;
167            

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john.pye@anu.edu.au
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