Energy Audit and Management Prof C S Solanki Department of Energy Science and Engineering Definition of Energy Audit It is a systematic research of energy conservation opportunities as well as a systematic approach to measure energy level of plant It is an effective tool in defining comprehensive energy management program In general Energy Audit is the translation of conservation ideas into realities, by blending technically feasible solutions with economic and other organizational consideration within a specified time frame NEED FOR ENERGY AUDIT (EA) Identify all the energy streams in a facility and to quantify energy use  Indicates where the major potential for improvement  Identifies the cost of energy and where and how it is used  It provides a base from which results can be measured and from which programmer can be further developed  OBJECTIVES OF ENERGY AUDIT • Assessment and reduction of electricity bill • Identifying potential areas of electrical energy economy • Assessing present pattern of energy consumption and optimizing energy consumption level • Highlighting wastages in major areas • Recommending energy saving measures with minimum possible investment and realization of savings Comply with government regulations: • The Energy Conservation Act 2003 (India), has identified 14 industry sectors and commercial buildings as designated consumers A comprehensive Energy Audit helps these industries comply with major provisions of the act like: •  Maintaining energy consumption within standard norms  Maintaining and reporting accurate energy usage patterns  Training of Energy Managers responsible for energy efficiency of the plant • • The Energy conservation techniques can be understood by studying the Energy conservation Act, 2003 (INDIA) Major Provisions of the Energy Conservation Act, 2003 (India):  Industries in specific sectors, with connected load of MW and above and/or consuming 20 MT of oil equivalent per hour on an average are notified as designated consumers All commercial buildings with connected load of more than 500KW are also notified as designated consumers  Designated consumers will comply with energy consumption standards and norms Different standards and norms are prescribed for different designated consumers  The Central Government, in consultation with BEE, can direct designated consumers to conduct Energy Audits by an accredited Energy Auditor based on a certain periodicity Industries notified under the Energy Conservation Act, 2001 (India): 10 Aluminum Fertilizer Iron and Steel Cement Pulp and Paper Chlor Alkali Sugar Textile Chemical Railway Conservation of energy through Auditing • • • • • • • • Removal of discrepancies between the operating and the design figures of energy consumptions Improvement in process technology Improvement in system design; change in temperature approach in heat exchangers Improvement in automations and controls for optimal utilization of energy Units/Systems integration: provision of a facility of one equipment for the other Incorporation of measures to improve efficiency such as cascading of energy Recovery of waste and low level heat, minimizing of losses, etc Detailed study of measure energy consuming equipments for possible energy savings by improving operations, improvement in hardware design and replacement with more efficient hardware TYPES OF ENERGY AUDIT The type of EA to be performed depends on •Function and type of Industry •Depth to which final audit is needed •Potential and magnitude of cost reduction desired There can be two types of EA •Preliminary Energy Audit ( PEA ) •Detailed Energy Audit ( DEA ) PEA Objective DEA Set priorities for optimizing a) Quantify Energy consumption and energy consumptions utilization b) Evolve detailed engineering for options to reduce energy cost Scope Highlight energy cost and Formulate detailed plan on the basis of wastages in major equipment quantitative evaluation /problems Duration Audit 2-10 days – 10 weeks a) No pre audit visit required a) One / two pre audit visits are required b) Detailed questionnaire to be b) In addition completed before audit Due date of Within weeks of completion of report field work - Advance notice to HOD’s - Arranging office and secretarial support - Advance tentative schedule - Audit kit planning Within months of completion of field work