Indian Ground-Source Heat Pump (GSHP) Geothermal — IGSHPA + ASHRAE Ch 32 + EN 15879 + CGWB

A 25,000 m² Indian campus GSHP system (100 TR cooling + 30 t/day DHW) demands ₹352 Cr capex with 60 × 200 m boreholes + HDPE U-loop + 100 TR water-to-water HP — saves ₹85 lakh/yr + 12-15 yr payback. IGSHPA + ASHRAE Handbook 2024 Ch 32 + EN 15879 + CGWB + IS 14246 govern. COP 3.5-6.5 by ground type. Three failures: geotechnical + TRT skipped before drilling, borehole spacing < 6 m causing thermal saturation + 25-35 % loss, closed-loop vs open-loop default without analysis.

Indian GSHP geothermal framework

India GSHP (Ground-Source Heat Pump) — limited Indian deployment vs Europe/USA. Suitable for Bengaluru + Pune + Hyderabad (moderate-climate Tier-1 cities) + Himalayan + NE hill stations. Players — Thermax + Voltas + Bock + Daikin + Stiebel Eltron. Standards stack — IGSHPA International Ground Source Heat Pump Association + ASHRAE Handbook 2024 Ch 32 + IS 14246 + EN 15879 (closed-loop GSHP) + EN 12977 (TES + GHX) + IS 1893 (seismic) + DGMS (deep wells where applicable).

GSHP MEP scope — 25,000 m² Indian campus building, 100 TR cooling + 30 t/day DHW

Three Indian GSHP failures

1. Geotechnical + thermal-response-test (TRT) skipped — GSHP performance depends on soil thermal conductivity. TRT per IGSHPA + EN 15879 mandatory before drilling. Indian projects skip — face under-performance + COP shortfall.
2. Borehole spacing too close — vertical boreholes at < 6 m spacing cause thermal saturation. EN 15879 mandates 6-8 m. Indian sites with limited area try 4-5 m + lose efficiency 25-35 %.
3. Closed-loop vs open-loop selection wrong — open-loop (aquifer thermal) cheaper but depends on CGWB approval + water-quality. Closed-loop universally usable but costlier. Indian projects default to one without analysis.