Analisis Potensi Panas Buang AC di Rumah Sakit

Abstrak

This study analyzes the potential utilization of waste heat from split-type air conditioning (AC) systems in hospital buildings as an alternative
energy source for water heating to improve energy efficiency and reduce electricity operating costs. Hospital cooling systems consume substantial electricity and generate condenser waste heat that is typically unused. A case study was conducted on a hospital HVAC system by
identifying installed unit capacities, calculating heat rejection potential using thermodynamic parameters and energy balance, and designing a
heat recovery system with heat exchangers and storage tanks. An economic feasibility assessment was performed, including capital expenditure
(CAPEX), operational expenditure (OPEX), energy savings, and payback period calculations. The results show that total waste heat potential reaches 3,234.96 kWh per day, with approximately 70% (2,264.47 kWh per day) considered recoverable. The hospital’s hot water demand of
10,000 liters per day requires about 349 kWh of energy, which can be fully supplied by the available AC waste heat. This corresponds to a
reduction of 349 kWh in daily electricity consumption and cost savings of approximately Rp 523,500 per day or Rp 191,077,500 annually. The
required investment is estimated at Rp 700,000,000, with annual operating costs of Rp 49,710,000 and net annual savings of Rp 141,367,500, resulting in a payback period of approximately 4.95 years. The novelty of this research lies in its integrated quantitative assessment based on actual capacity data, linking waste heat potential analysis, system design, and economic feasibility evaluation for hospital utilities. The findings demonstrate that AC waste heat recovery is technically feasible, economically viable, and applicable as an energy efficiencystrategy for healthcare building services.