Central Heating System Testing AND ROOFING OPTIONS.pptx

Central Heating System Testing and Roofing Options

1. CENTRAL HEATING SYSTEM CHS “WE WILL EITHER FIND A WAY OR MAKE ONE”

2. CENTRAL HEATING SYSTEM CHS RADIANT/CONVECTIVE AHU BASED (BASED ON TWIN SYSTEM) “WE WILL EITHER FIND A WAY OR MAKE ONE”

3. RADIANT & CONVECTIVE HEATING PILOT PROJECT AT SRINAGAR 1. CONCEPT. HEAT THE CONCRETE FLOOR BY CIRCULATING HEATED WATER/GLYCOL MIXTURE THROUGH PE-RT PIPES SO THAT THE FLOOR STARTS RADIATING AND HEAT TRANSFERS THROUGH RADIATION AND NATURAL CONVECTION. 2. OPERATION. (a) WATER/GLYCOL MIXTURE IS HEATED BY HOT WATER GENERATORS, WHICH IS THEN CIRCULATED INSIDE THE HANGAR THROUGH A PRIMARY LOOP. (b) THIS HEATED MIXTURE THEN TRANSFERS ITS HEAT TO THE SECONDARY LOOP, CONTAINING WATER/GLYCOL MIXTURE THROUGH A HEAT EXCHANGER, WHICH PASSES UNDER THE PQC FLOOR. 3. TOTAL POLYETHYLENE RAISED TEMP (PE-RT) PIPE USED IS APPROX 30 KMS, WHICH IS EMBEDDED IN PQC. 4 . PROBLEMS FACED. FLOOR TEMP RISE AS PER DESIRED REQUIREMENT WAS NOT BEING ACHIEVED DURING INITIAL TESTING CARRIED OUT IN JAN 2021. 5. RECTIFICATION ACTIONS INITIATED. (a) HOD MECH DEPT, IIT KANPUR WAS REQUESTED TO VISIT THE SITE ON SHORT NOTICE AND RECOM CHANGES. SITE VISIT WAS DONE IN THE LAST WEEK OF FEB 2021. (b) CERTAIN CHANGES CARRIED OUT IN THE HOT WATER GENERATOR FUEL INJECTION SYSTEM TO INCREASE EFFECIENCY. (c) CERTAIN PUMPS RE-LOCATED TO INCREASE FLOW RATE WHICH WAS CONSIDERED AS A MAJOR REASON FOR INADEQUATE FLOOR HEATING. “WE WILL EITHER FIND A WAY OR MAKE ONE”

4. RADIANT & CONVECTIVE HEATING PILOT PROJECT AT SRINAGAR 6. TESTING AND RESULTS. (a) SUCCESSFUL TESTING CARRIED OUT FROM 28-30 JAN 2022 IN THE PRESENCE OF SR IEM AND USER REP INCL AOC, 1 WG, CADMO AND WKS OFFR. (b) MAX INSIDE TEMP ACHIEVED WAS 23.5 ﹾ C WHEN OUTSIDE TEMP WAS -1 ﹾ C (FURTHER INCR IN TEMP COULD HAVE BEEN ACHIEVED BUT TESTING WAS STOPPED AFTER 72 HRS AS PER CONTRACT CONDITIONS) . (c) CONTRACT CONDITION 20 ﹾ C (+-) 2 ﹾ C WHEN - 7 ﹾ C OUTSIDE. (d) MAX FLOOR TEMP ACHIEVED 34 ﹾ C. PE-RT PIPES LAYED IN PQC

5. ROOFING OPTIONS “WE WILL EITHER FIND A WAY OR MAKE ONE”

6. OPTION 1 – HEAT TRACING CABLES “WE WILL EITHER FIND A WAY OR MAKE ONE”

7. FIG DEPICTING THE HEAT TACING CABLES LAID ON THE MLH ROOF OPTION 1 – HEAT TRACING CABLES “WE WILL EITHER FIND A WAY OR MAKE ONE”

8. COSTING HEAT TRACING CABLE APPROX 10000 METRES – 50.0 L TRANSFORMER 320 KVA WITH ACCESSORIES – 20.0 L FIXING ARNG – 5.0 L TOTAL APPROX 75.0 L (MINIMUM) “WE WILL EITHER FIND A WAY OR MAKE ONE”

9. FIG DEPICTING HOT WATER CIRCULATION ON THE MLH ROOF (HEAT EXCHANGER) Plant Room 04 x Burner Exhaust Mixture of Water & Glycol Mixture of Water & Glycol collected at Eaves level Mixture of Water & Glycol collected at Eaves level Mixer Tank Mixture of Water & Glycol connected back to Heat Exchanger Flow of Hot Mixture (Water & Glycol) OPTION 2 – HEAT EXCHANGER BASED WATER CIRCULATION HE “WE WILL EITHER FIND A WAY OR MAKE ONE”

10. COSTING HEAT EXCHANGER – 5.0 L PIPING AND PUMP WITH ACCESSORIES – 4.0 L FIXING ARNG – 2.0 L CONSULTANCY WITH IIT – 1.5 L TOTAL APPROX 12.5 L (MINIMUM) “WE WILL EITHER FIND A WAY OR MAKE ONE”

11. OPTION 3 – HYBRID SYSTEM “WE WILL EITHER FIND A WAY OR MAKE ONE” HEAT EXCHANGER BASED PIPING SYSTEM FOR THE ROOF HEAT CABLE FOR THE EAVE TO NEGATE ICE DAMS

12. FIG DEPICTING THE HYBRID SYSTEM ON THE MLH ROOF Plant Room 04 x Burner Exhaust Mixture of Water & Glycol Mixture of Water & Glycol collected at Eaves level Mixture of Water & Glycol collected at Eaves level Mixer Tank Mixture of Water & Glycol connected back to Heat Exchanger Flow of Hot Mixture (Water & Glycol) Placement of Heat Tracing Cable at Eaves Level Placement of Heat Tracing Cable at Eaves Level OPTION 3 – HYBRID SYSTEM “WE WILL EITHER FIND A WAY OR MAKE ONE” HE

13. COSTING HEAT EXCHANGER – 5.0 L HEAT TRACING CABLE 200 METRES – 1.0 L PIPING AND PUMP WITH ACCESSORIES – 4.0 L FIXING ARNG – 2.0 L CONSULTANCY WITH IIT – 1.5 L TOTAL APPROX 13.5 L (MINIMUM) RECOMMENDED OPTION “WE WILL EITHER FIND A WAY OR MAKE ONE”

14. TIMELINES “WE WILL EITHER FIND A WAY OR MAKE ONE”

15. DATE TIMELINE/SEQUENCE OF EVENTS D DAY ACCEPTANCE OF PROPOSAL D+30 DESIGNING BY IIT D+75 TENDERING (45 DAYS) D+175 COMPLETION OF WK (100 DAYS MAX) NOV/DEC TESTING OF THE SYSTEM ROOFING SOLUTION TIMELINES “WE WILL EITHER FIND A WAY OR MAKE ONE”