There are many HLV designs being studied by ISRO .... re-posting an old post of mine .
Heavy Lift Launch Vehicle concepts
ISRO have carried out study of 4 different concepts of HLV to date . These are explained below in random order .
Concept-1
Payload Capacity : 25 tons to LEO (10 tons to GTO)
A Heavy lift Launch Vehicle capable of placing up to 10 ton class of spacecrafts into Geosynchronous Transfer Orbit is currently under study by a project team. This new generation launch vehicle will derive its propulsion modules from LVM3 as well as from new developments, which include :
1) semi cryogenic booster stage, SC200
2) larger solid strap on boosters as compared to S200 strap on motors used in LVM3 (S250) and
3) a larger cryogenic upper stage (C50).
Welcome to VIKRAM SARABHAI SPACE CENTRE - Heavy Lift Launcher
Concept-2&3
Concept 2&3 together was supposed to carry out a human mission to moon . It was first shown in a presentation by ISRO at the IAC 2009 .
Concept-2 =
Crew Launch Vehicle
* Architecture - 4 S230 + SC500 + C60
* Liftoff weight - 1690 tons
* Capability - 31 tons to Low Earth Orbit
* Payload - Crew Module (6 tons) + Service Module (25 tons)
Concept-3 =
Carge Launch Vehicle
* Architecture - 8 S230 + SC800 + C60
* Liftoff weight - 3075 tons
* Capability - 84 tons to Low Earth Orbit
* Payload - Earth Departure Stage (67 tons) + Lunar Descent Module (17 tons)
SuperNova: Indian Moon Rockets: First Look
Concept-4
Single LV capable of Lunar Man Mission with payload capacity of 100tons to LEO
This looks like a single LV capable of replacing two LV of concept-2&3
SuperNova: ISRO Heavy Lift Vehicle
Source:
Indian Space Capabilities | Page 267